Scripts for setting up nginx

README.md

@@ -115,7 +115,7 @@ and register the SSH public key of root as __deploy key__ to allow readonly acce
        || (ssh-keygen \
            -t ed25519 \
            -f "/root/.ssh/id_ed25519" -q -N "" \
-           -C "$(date +%Y%m%d):root@$(hostname -b)" \
+           -C "$(date +%Y%m%d)-root@$(hostname -b)" \
        && cat "/root/.ssh/id_ed25519.pub")
    ```
 
@@ -145,7 +145,7 @@ cat "${JENKINS_HOME}/.ssh/id_ed25519.pub" \
     || (ssh-keygen \
         -t ed25519 \
         -f "${JENKINS_HOME}/.ssh/id_ed25519" -q -N "" \
-        -C "$(date +%Y%m%d):$(whoami)@$(echo ${JENKINS_URL} | cut -d/ -f3)" \
+        -C "$(date +%Y%m%d)-$(whoami)@$(echo ${JENKINS_URL} | cut -d/ -f3)" \
     && cat "${JENKINS_HOME}/.ssh/id_ed25519.pub")
 
 # add your host here, note the tailing '&' to run it in parallel

manual/README.md

@@ -1,30 +0,0 @@
-Manual
-======
-
-Each script `${FULL_SCRIPTNAME}.sh` has it's corresponding manual here:
- - `manuals/${FULL_SCRIPTNAME}.sh.md`
-
-According to the rule above, this directory `manuals/core/*`  
-has the same structure as `../core/*` and contains all manuals explaining the core functionality.
-
-And this directory `manuals/script/*`  
-has the same structure as `../script/*` and contains all manuals explaining the purpose of each script.
-
-
-
-Core functionality
-------------------
-
-This set of scripts is the absolute minimum to provide the core functionality:
- - `setupCoreOntoThisHost.sh` bootstraps an empty new host, after the scripts repository was cloned  
-   [Read this for further details](./setupCoreOntoThisHost.sh.md)
- - `setupCoreOntoThisHost.sh` needs [`../core/addAndCheckGitRepository.sh`](./core/addAndCheckGitRepository.sh.md)
- - `setupCoreOntoThisHost.sh` needs [`../core/addNormalUser.sh`](./core/addNormalUser.sh.md)
- - `setupCoreOntoThisHost.sh` needs [`../core/addToCrontabEveryHour.sh`](./core/addToCrontabEveryHour.sh.md)
- - `setupCoreOntoThisHost.sh` needs [`../core/defineAuthorizedKeysOfUser.sh`](./core/defineAuthorizedKeysOfUser.sh.md)
- - `setupCoreOntoThisHost.sh` needs [`../core/ensureUsageOfDefinitions.sh`](./core/ensureUsageOfDefinitions.sh.md)
-
-
-
-The scripts
------------

manual/core/addNormalUser.sh.md

@@ -1,8 +0,0 @@
-[core/addNormalUser.sh](..//core/addNormalUser.sh)
-==================================================
-
-This script adds a normal user to the host on which it was called.
-
-__Parameters:__
-  1. USER (mandantory)
-          Name of the user who will be added to the host

manual/core/defineAuthorizedKeysOfUser.sh.md

@@ -1,8 +0,0 @@
-[core/defineAuthorizedKeysOfUser.sh](../core/defineAuthorizedKeysOfUser.sh)
-===========================================================================
-
-This script defines the `authorized_keys` file of the given user.
-It will create a link pointing to the file in definitions to distribute the same settings across all hosts.
-
-__Parameters:__
-  1. USER (mandantory) Name of the user who will receive the ssh settings.

manual/script/host/README.md

@@ -1,9 +0,0 @@
-script/host
-===========
-
-This folder contains scripts managing the host.  
-For example:
-  - certificates
-  - git
-  - ssh
-  - users

manual/script/host/user/README.md

@@ -1,4 +0,0 @@
-script/host/user
-================
-
-This folder contains scripts managing users of a host.

prepareThisHostBeforeCloning.sh

@@ -33,7 +33,7 @@ function prepareThisHost() {
     ssh-keygen \
         -t ed25519 \
         -f "/root/.ssh/id_ed25519" -q -N "" \
-        -C "$(date +%Y%m%d):root@$(hostname -b)"
+        -C "$(date +%Y%m%d)-root@$(hostname -b)"
 
     cat "/root/.ssh/id_ed25519.pub" \
         && return 0

script/docker/printAllBridgedNetworksWithRange.sh

@@ -0,0 +1,4 @@
+#/bin/bash
+
+docker network inspect $(docker network ls | grep -F 'bridge' | cut -d' ' -f1) \
+    | jq -r '.[] | .Name + " " + .IPAM.Config[0].Subnet' -

script/docker/printContainerNamesOfComposition.sh

@@ -0,0 +1,23 @@
+#/bin/bash
+
+_COMPOSITION_FILE="${1:-./docker-compose.yml}"
+
+[ -d "${_COMPOSITION_FILE}" ] \
+    && echo "A valid composition file ('docker-compose.yml') is needed. Given parameter was: ${_COMPOSITION_FILE}" >&2 \
+    && exit 1
+
+_DOCKER_COMPOSE_CMD=""
+
+[ "${_DOCKER_COMPOSE_CMD}" = "" ] \
+    && docker compose version 2> /dev/null | grep -q version \
+    && _DOCKER_COMPOSE_CMD="docker compose"
+
+[ "${_DOCKER_COMPOSE_CMD}" = "" ] \
+    && docker-compose version 2> /dev/null | grep -q version \
+    && _DOCKER_COMPOSE_CMD="docker-compose"
+
+[ "${_DOCKER_COMPOSE_CMD}" = "" ] \
+    && echo "Command 'docker compose' not found" >&2 \
+    && exit 1
+
+${_DOCKER_COMPOSE_CMD} -f "${_COMPOSITION_FILE}" images | tail -n +2 | cut -d' ' -f1

script/host/net/printAllShortManagedHostnamesFromHostsFile.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# Select just lines containing 'managedHost'.
+# 1.) Remove everything after a '#' (including the #).
+# 2.) Remove every indenting.
+# 3.) Remove blanks (spaces or tabs) at the end of lines.
+# 4.) Replace blanks (spaces or tabs) with one ';' between the values.
+# 5.) Delete empty lines.
+# Then cut the second field
+# Then cut the first field to get the short hostname
+grep 'managedHost' /etc/hosts \
+    | sed -e 's/#.*//' \
+        -e 's/^[[:blank:]]*//' \
+        -e 's/[[:blank:]]*$//' \
+        -e 's/\s\+/;/g' \
+        -e '/^$/d' \
+    | cut -d';' -f2 \
+    | cut -d'.' -f1
+

script/host/net/printOwnDefaultMACAdress.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+cat /sys/class/net/e*/address \
+    | head -n 1

script/host/net/printOwnIPv4Adress.sh

@@ -0,0 +1,108 @@
+#!/bin/bash
+
+#grep -E '(:|^(127|169\.254|10|172\.(1(6|7|8|9)|2[0-9]|30|31)|192\.168|(22(4|5|6|7|8|9)|23(0|1|2|3|4|5|6|7|8|9))).*)' findet:
+#  loopback:  127.0.0.0/8
+#  linklocal: 169.254.0.0/16
+#  private:   10.0.0.0/8,
+#             172.16.0.0/12,   (172.16… bis 172.31…)
+#             192.168.0.0/16
+# multicast:  224.0.0.0/4      (224… bis 239…)
+
+
+function all() {
+    # Select just lines containing 'inet'.
+    # 1.) Remove every indenting.
+    # 2.) Remove 'inet '.
+    # 3.) Remove everything after a '/' (including the /).
+    ip -4 addr \
+        | grep 'inet' \
+        | sed -e 's/^[[:blank:]]*//' \
+            -e 's/inet //' \
+            -e 's/\/.*//'
+}
+
+function routed() {
+    local _DEVICE
+    _DEVICE="$(ip -4 route show default | xargs -n 1 | grep -A1 -i dev | tail -n 1)"
+    readonly _DEVICE
+
+    ip -4 addr show dev "${_DEVICE:?"Missing DEVICE"}" scope global \
+        | grep 'inet' | xargs -n 1 \
+        | grep -A1 'inet' \
+        | tail -n 1 \
+        | cut -d/ -f1
+}
+
+function public() {
+    hostname -I | xargs -n 1 \
+        | grep -vE '(:|^(127|169\.254|10|172\.(1(6|7|8|9)|2[0-9]|30|31)|192\.168|(22(4|5|6|7|8|9)|23(0|1|2|3|4|5|6|7|8|9))).*)'
+}
+
+# Maybe use "resolvectl status" to get DNS Server and specify 'nslookup'
+function published() {
+    local _BOOT_HOSTNAME
+    _BOOT_HOSTNAME="$(hostname -b)"
+    readonly _BOOT_HOSTNAME
+
+    nslookup -type=A "${_BOOT_HOSTNAME:?"Missing BOOT_HOSTNAME"}" | xargs -n 1 \
+        | grep -A2 -i "${_BOOT_HOSTNAME}" \
+        | grep -A1 -i 'address' \
+        | tail -n1
+}
+
+function verified() {
+    local _PUBLISHED_IP
+    _PUBLISHED_IP="$(published)"
+    readonly _PUBLISHED_IP
+
+    [ -z "${_PUBLISHED_IP}" ] \
+        && return 0
+
+    all | grep "${_PUBLISHED_IP}"
+}
+
+function usage() {
+    echo "Use one of the following options:"
+    echo "  --all       : prints all IPv4 addresses"
+    echo "  --routed    : prints the IPv4 address used to send traffic to the default gateway"
+    echo "  --public    : prints all IPv4 addresses direct accessable from the internet"
+    echo "  --published : prints the IPv4 address provided by DNS using this host's name"
+    echo "  --verified  : prints the IPv4 included in 'all' und respended by 'published'"
+}
+
+
+
+function main(){
+
+    case "${1}" in
+        --all)
+            all
+            return 0
+            ;;
+        --routed)
+            routed
+            return 0
+            ;;
+        --public)
+            public
+            return 0
+            ;;
+        --published)
+            published
+            return 0
+            ;;
+        --verified)
+            verified
+            return 0
+            ;;
+        *)
+            usage
+            return 1
+            ;;
+    esac
+
+    return 1
+
+}
+
+ main "$@" && exit 0 || exit 1

script/host/net/printOwnIPv6Adress.sh

@@ -0,0 +1,109 @@
+#!/bin/bash
+
+#grep -E '(^::1|(^fc.*|^fd.*)|^fe80::.*|^ff.*)' findet:
+#  loopback: ::1/128
+#  uniquelocal: fc00::/7   (fc00… bis fdff…)
+#  linklocal:   fe80::/64
+#  multicast:   ff00::/8   (ff…)
+
+
+
+function all() {
+    # Select just lines containing 'inet6'.
+    # 1.) Remove every indenting.
+    # 2.) Remove 'inet6 '.
+    # 3.) Remove everything after a '/' (including the /).
+    ip -6 addr \
+        | grep 'inet6' \
+        | sed -e 's/^[[:blank:]]*//' \
+            -e 's/inet6 //' \
+            -e 's/\/.*//'
+}
+
+function routed() {
+    local _DEVICE
+    _DEVICE="$(ip -6 route show default | xargs -n 1 | grep -A1 -i dev | tail -n 1)"
+    readonly _DEVICE
+
+    ip -6 addr show dev "${_DEVICE:?"Missing DEVICE"}" scope global \
+        | grep 'inet6' \
+        | xargs -n 1 \
+        | grep -A1 'inet6' \
+        | grep ':' \
+        | cut -d/ -f1
+}
+
+function public() {
+    hostname -I | xargs -n 1 \
+        | grep ':' \
+        | grep -vE '(^::1|(^fc.*|^fd.*)|^fe80::.*|^ff.*)'
+}
+
+# Maybe use "resolvectl status" to get DNS Server and specify 'nslookup'
+function published() {
+    local _BOOT_HOSTNAME
+    _BOOT_HOSTNAME="$(hostname -b)"
+    readonly _BOOT_HOSTNAME
+
+    nslookup -type=AAAA "${_BOOT_HOSTNAME:?"Missing BOOT_HOSTNAME"}" | xargs -n 1 \
+        | grep -A2 -i "${_BOOT_HOSTNAME}" \
+        | grep -A1 -i address \
+        | tail -n1
+}
+
+function verified() {
+    local _PUBLISHED_IP
+    _PUBLISHED_IP="$(published)"
+    readonly _PUBLISHED_IP
+
+    [ -z "${_PUBLISHED_IP}" ] \
+        && return 0
+
+    all | grep "${_PUBLISHED_IP}"
+}
+
+function usage() {
+    echo "Use one of the following options:"
+    echo "  --all       : prints all IPv6 addresses"
+    echo "  --routed    : prints the IPv6 address used to send traffic to the default gateway"
+    echo "  --public    : prints all IPv6 addresses direct accessable from the internet"
+    echo "  --published : prints the IPv6 address provided by DNS using this host's name"
+    echo "  --verified  : prints the IPv6 included in 'all' und respended by 'published'"
+}
+
+
+
+function main(){
+
+    case "${1}" in
+        --all)
+            all
+            return 0
+            ;;
+        --routed)
+            routed
+            return 0
+            ;;
+        --public)
+            public
+            return 0
+            ;;
+        --published)
+            published
+            return 0
+            ;;
+        --verified)
+            verified
+            return 0
+            ;;
+        *)
+            usage
+            return 1
+            ;;
+    esac
+
+    return 1
+
+}
+
+ main "$@" && exit 0 || exit 1

script/host/net/printOwnMACAdresses.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+cat /sys/class/net/e*/address

script/host/net/printOwnShortHostnameFromHostsFile.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# Select just lines containing 'inet'.
+# 1.) Remove every indenting.
+# 2.) Remove 'inet '.
+# 3.) Remove everything after a '/' (including the /).
+# Search each IP of the IPv4-list in file '/etc/hosts' 
+# Select just lines containing 'managedHost'.
+# 1.) Remove everything after a '#' (including the #).
+# 2.) Remove every indenting.
+# 3.) Remove blanks (spaces or tabs) at the end of lines.
+# 4.) Replace blanks (spaces or tabs) with one ';' between the values.
+# 5.) Delete empty lines.
+# Then cut the second field
+# Then cut the first field to get the short hostname
+ip -4 addr \
+    | grep 'inet' \
+    | sed -e 's/^[[:blank:]]*//' \
+        -e 's/inet //' \
+        -e 's/\/.*//' \
+    | xargs -i grep {} /etc/hosts \
+    | grep 'managedHost' \
+    | sed -e 's/#.*//' \
+        -e 's/^[[:blank:]]*//' \
+        -e 's/[[:blank:]]*$//' \
+        -e 's/\s\+/;/g' \
+        -e '/^$/d' \
+    | cut -d';' -f2 \
+    | cut -d'.' -f1
+

script/host/nginx/restartIfConfigurationIsValid.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+nginx -t &> /dev/null \
+    && systemctl restart nginx.service \
+    && exit 0
+
+exit 1

script/host/nginx/setup.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+function main() {
+    local _SCRIPTPATH _DH_PATH _SELF_SIGNED_PATH
+    _SCRIPTPATH="$(cd -- "$(dirname "$0")" > /dev/null 2>&1; pwd -P)"
+    _DH_PATH="/etc/ssl/private"
+    _SELF_SIGNED_PATH="/etc/ssl/private"
+    readonly _SCRIPTPATH _DH_PATH _SELF_SIGNED_PATH
+
+    ! dpkg -s nginx > /dev/null 2>&1 \
+        && apt-get --yes install nginx-full \
+        && echo "Nginx erfolgreich installiert." \
+        || echo "Nginx ist bereits installiert."
+
+    ! dpkg -s openssl > /dev/null 2>&1 \
+        && apt-get --yes install openssl \
+        && echo "OpenSSL erfolgreich installiert." \
+        || echo "OpenSSL ist bereits installiert."
+
+    ! [ -f "${_DH_PATH}/dhparam4096.pem" ] \
+        && mkdir -p "${_DH_PATH}" \
+        && chmod go-rwx "${_DH_PATH}" \
+        && openssl dhparam -out "${_DH_PATH}/dhparam4096.pem" 4096 \
+        && echo "Diffie-Hellman-Parameters erfolgreich erstellt." \
+        || echo "Diffie-Hellman-Parameters bereits vorhanden."
+
+    ! [ -f "${_SELF_SIGNED_PATH}/selfsigned-private.key" ] \
+        && mkdir -p "${_SELF_SIGNED_PATH}" \
+        && chmod go-rwx "${_SELF_SIGNED_PATH}" \
+        && openssl req -x509 -days 36524 -nodes -newkey rsa:4096 \
+             -keyout "${_SELF_SIGNED_PATH}/selfsigned-private.key" \
+             -out "${_SELF_SIGNED_PATH}/selfsigned-fullchain.crt" \
+        && echo "Selbstsignierte Standardschlüssel erfolgreich erstellt." \
+        || echo "Selbstsignierte Standardschlüssel bereits vorhanden."
+
+#TODO Links erstellen
+#    [ -d "/etc/nginx/" ] \
+#        && cp "${_SCRIPTPATH}/etc_nginx_conf.d/"* "/etc/nginx/conf.d/" \
+#        && mkdir -p /etc/nginx/ssl-trusted \
+#        && cp "${_SCRIPTPATH}/etc_nginx_ssl-trusted/"* "/etc/nginx/ssl-trusted/" \
+#        && mkdir -p /var/www/letsencrypt/.well-known/acme-challenge \
+#        && echo "Basis-Konfiguration erfolgreich erstellt." \
+#        || echo "Basis-Konfiguration bereits vorhanden."
+
+    echo \
+        && echo "Nginx neu starten:" \
+        && nginx -t \
+        && systemctl restart nginx.service \
+        && return 0
+
+    return 1
+}
+
+main "$@" && exit 0 || exit 1

script/host/user/addUserToSudoGroup.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo usermod --append --groups sudo "${1:?"Missing first parameter USER"}"

script/host/user/removeUserFromSudoGroup.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo usermod --remove --groups sudo "${1:?"Missing first parameter USER"}"

script/monitor/README.md

@@ -1,126 +1,33 @@
 
-How to setup a monitoring dashboard
+Monitoring - How it works
-===================================
+=========================
 
-Inspired by: https://pimylifeup.com/ubuntu-chromium-kiosk/
+Basics
+------
 
-Steps
+You have to set up the monitoring host first. That host will monitor your other machines.
------
+Execute `/cis/script/monitor/setupMonitoringHost.sh` to start the process.
 
-
+As usual you can configure this feature via definitions.
-
+```
-### 1.) Install Ubuntu Server (no desktop) on your computer than set hostname and timezone.
+# Path of this feature's scripts       : '/cis/script                 /monitor'
-
+# Path of the corresponding definitions: '/cis/definitions/YOUR.DOMAIN/monitor'
-```sh
+ls -lha '/cis/script/monitor'
-hostnamectl set-hostname check.local
+ls -lha '/cis/definitions/YOUR.DOMAIN/monitor'
-timedatectl set-timezone Europe/Berlin
 ```
 
+You can modify the appearance and place your own `check.css` or `logo.png` into the definitions folder:
 
+ - /cis/definitions/YOUR.DOMAIN/monitor/check.css
+ - /cis/definitions/YOUR.DOMAIN/monitor/logo.png
 
-### 2.) Install minimal GUI and Tools.
+After the change, you have to call `/cis/script/monitor/setupMonitoringHost.sh` again,  
-
+because it creates links in '/var/www/html/' and gives the definitions priority over the script.  
-```sh
+Additional you need to configure a webserver to publish the site. 
-apt install ubuntu-desktop-minimal
-apt install language-pack-gnome-de
-apt install xdotool
-apt install dbus-x11
-```
 
 
 
-### 3.) Create a kiosk user with home-directory.
+Dashboard
+---------
 
-```sh
+You can set up an dashboard following this manual [SETUP_DASHBOARD.md](SETUP_DASHBOARD.md)
-useradd -m kiosk
-```
-
-and disable Welocme-Screen
-```sh
-echo "yes" > /home/kiosk/.config/gnome-initial-setup-done
-```
-
-
-
-### 4.) Edit following file `nano /etc/gdm3/custom.conf` to turn of wayland and turn on autologin for user 'kiosk'.
-
-```
-[daemon]
-# Uncomment the line below to force the login screen to use Xorg
-#WaylandEnable=false
-
-WaylandEnable=false
-
-# Enabling automatic login
-#  AutomaticLoginEnable = true
-#  AutomaticLogin = user1
-
-AutomaticLoginEnable = true
-AutomaticLogin = kiosk
-```
-
-
-
-### 5.) Configure GUI of user kiosk to prevent monitor from sleeping
-
-```sh
-#gsettings list-recursively
-
-# Does not work
-#sudo -u kiosk gsettings set org.gnome.desktop.session idle-delay 0
-
-# Set idle-delay from "uint32 300" to "uint32 0", needs 'apt install dbus-x11'
-# You can check the value in "GUI-Session of kiosk -> Settings -> Power"
-sudo -u kiosk dbus-launch dconf write /org/gnome/desktop/session/idle-delay "uint32 0"
-```
-
-
-
-### 6.) Create custom service to start firefox loading the page.
-
-Therefore create a file `/etc/systemd/system/kiosk.service` with this content:
-
-```
-[Unit]
-Description=Firefox Kiosk
-Wants=graphical.target
-After=graphical.target
-
-[Service]
-Environment=DISPLAY=:0
-# Set firefox language, needs 'apt install language-pack-gnome-de' 
-Environment=LANG=de_DE.UTF-8
-Type=simple
-# Always a fresh firefox ('-' allow error if common does not exist)
-ExecStartPre=-/usr/bin/rm -r /home/kiosk/snap/firefox/common
-# Move Mouse (should also work on small screens), needs 'apt install dbus-x11'
-ExecStartPre=/usr/bin/xdotool mousemove 4096 2160
-# See: https://wiki.mozilla.org/Firefox/CommandLineOptions (just -kiosk URL => Start-Assistant, so use -url too)
-ExecStart=/usr/bin/firefox -fullscreen -kiosk -url http://monitor.example.net/check.html
-Restart=always
-RestartSec=30
-User=kiosk
-Group=kiosk
-
-[Install]
-WantedBy=graphical.target
-```
-
-
-
-### 7.) Enable the service and reboot
-
-```sh
-systemctl enable kiosk
-reboot
-```
-
-
-
-Troubleshouting
----------------
-
-```
-systemctl disable pd-mapper.service
-apt purge cloud-init -y && apt autoremove --purge -y
-```

script/monitor/SETUP_DASHBOARD.md

@@ -0,0 +1,126 @@
+
+How to setup a monitoring dashboard
+===================================
+
+Inspired by: https://pimylifeup.com/ubuntu-chromium-kiosk/
+
+Steps
+-----
+
+
+
+### 1.) Install Ubuntu Server (no desktop) on your computer than set hostname and timezone.
+
+```sh
+hostnamectl set-hostname check.local
+timedatectl set-timezone Europe/Berlin
+```
+
+
+
+### 2.) Install minimal GUI and Tools.
+
+```sh
+apt install ubuntu-desktop-minimal
+apt install language-pack-gnome-de
+apt install xdotool
+apt install dbus-x11
+```
+
+
+
+### 3.) Create a kiosk user with home-directory.
+
+```sh
+useradd -m kiosk
+```
+
+and disable Welocme-Screen
+```sh
+echo "yes" > /home/kiosk/.config/gnome-initial-setup-done
+```
+
+
+
+### 4.) Edit following file `nano /etc/gdm3/custom.conf` to turn of wayland and turn on autologin for user 'kiosk'.
+
+```
+[daemon]
+# Uncomment the line below to force the login screen to use Xorg
+#WaylandEnable=false
+
+WaylandEnable=false
+
+# Enabling automatic login
+#  AutomaticLoginEnable = true
+#  AutomaticLogin = user1
+
+AutomaticLoginEnable = true
+AutomaticLogin = kiosk
+```
+
+
+
+### 5.) Configure GUI of user kiosk to prevent monitor from sleeping
+
+```sh
+#gsettings list-recursively
+
+# Does not work
+#sudo -u kiosk gsettings set org.gnome.desktop.session idle-delay 0
+
+# Set idle-delay from "uint32 300" to "uint32 0", needs 'apt install dbus-x11'
+# You can check the value in "GUI-Session of kiosk -> Settings -> Power"
+sudo -u kiosk dbus-launch dconf write /org/gnome/desktop/session/idle-delay "uint32 0"
+```
+
+
+
+### 6.) Create custom service to start firefox loading the page.
+
+Therefore create a file `/etc/systemd/system/kiosk.service` with this content:
+
+```
+[Unit]
+Description=Firefox Kiosk
+Wants=graphical.target
+After=graphical.target
+
+[Service]
+Environment=DISPLAY=:0
+# Set firefox language, needs 'apt install language-pack-gnome-de' 
+Environment=LANG=de_DE.UTF-8
+Type=simple
+# Always a fresh firefox ('-' allow error if common does not exist)
+ExecStartPre=-/usr/bin/rm -r /home/kiosk/snap/firefox/common
+# Move Mouse (should also work on small screens), needs 'apt install dbus-x11'
+ExecStartPre=/usr/bin/xdotool mousemove 4096 2160
+# See: https://wiki.mozilla.org/Firefox/CommandLineOptions (just -kiosk URL => Start-Assistant, so use -url too)
+ExecStart=/usr/bin/firefox -fullscreen -kiosk -url http://monitor.example.net/check.html
+Restart=always
+RestartSec=30
+User=kiosk
+Group=kiosk
+
+[Install]
+WantedBy=graphical.target
+```
+
+
+
+### 7.) Enable the service and reboot
+
+```sh
+systemctl enable kiosk
+reboot
+```
+
+
+
+Troubleshouting
+---------------
+
+```
+systemctl disable pd-mapper.service
+apt purge cloud-init -y && apt autoremove --purge -y
+```

script/monitor/checks/EXAMPLE_CHECK.off

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+_CHECK="$(readlink -f "${0}" 2> /dev/null)"
+
+# Folders always ends with an tailing '/'
+_CIS_ROOT="${_CHECK%%/definitions/*}/"             #Removes longest  matching pattern '/definitions/*' from the end
+_GENERIC_CHECKS="${_CIS_ROOT:?"Missing CIS_ROOT"}script/monitor/generic/"
+
+${_GENERIC_CHECKS:?"Missing GENERIC_CHECKS"}OVERRIDDEN_DOMAIN_CHECK.sh "your-host.your-domain.net"

script/monitor/generic/CIS_OWN_DOMAIN_CHECK.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+_REMOTE_HOST="${1:?"FQDN of server missing: e.g. host.example.net[:port]"}"
+_REMOTE_HOSTNAME_FQDN="${_REMOTE_HOST%%:*}"            #Removes longest  matching pattern ':*' from the end
+_REMOTE_HOSTNAME_SHORT="${_REMOTE_HOSTNAME_FQDN%%.*}"  #Removes longest  matching pattern '.*' from the end
+_REMOTE_PORT="${_REMOTE_HOST}:"
+_REMOTE_PORT="${_REMOTE_PORT#*:}"                      #Removes shortest matching pattern '*:' from the begin
+_REMOTE_PORT="${_REMOTE_PORT%%:*}"                     #Removes longest  matching pattern ':*' from the end
+_REMOTE_PORT="${_REMOTE_PORT:-"22"}"
+_REMOTE_USER="monitoring"
+_SOCKET='~/.ssh/%r@%h:%p'
+
+
+
+function checkOrStartSSHMaster() {
+    timeout --preserve-status 1 ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} 2>&1 | grep -q -F 'Master running' \
+        && return 0
+
+    ssh -O stop -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} &> /dev/null
+    ssh -o ControlMaster=auto \
+        -o ControlPath=${_SOCKET} \
+        -o ControlPersist=65 \
+        -p ${_REMOTE_PORT} \
+        -f ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} exit &> /dev/null \
+        && return 0
+
+    echo "FAIL#SSH connection (setup ok?)"
+    return 1
+}
+
+function testDomain(){
+    checkOrStartSSHMaster \
+        || return 1
+
+    local _RESULT="$(ssh -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} 'bash /cis/core/printOwnDomain.sh' 2>&1 1>/dev/null)"
+
+    [ -z "${_RESULT}" ] \
+        && echo "OK" \
+        && return 0
+
+    echo "WARNING#Check hosts '/cis/core/printOwnDomain'"
+    return 0
+}
+
+testDomain && exit 0

script/monitor/generic/NGINX_CHECK.sh

@@ -13,8 +13,7 @@ _SOCKET='~/.ssh/%r@%h:%p'
 
 
 function checkOrStartSSHMaster() {
-    timeout --preserve-status 1 "ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN}" &> /dev/null \
+    timeout --preserve-status 1 ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} 2>&1 | grep -q -F 'Master running' \
-        && echo "master checked" \
         && return 0
 
     ssh -O stop -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} &> /dev/null

script/monitor/generic/POSTGRES_CERTIFICATE_CHECK.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+function checkPostgresSSLCertificate() {
+    local _SERVER
+    _SERVER="${1:?"FQDN of server missing"}"
+    readonly _SERVER
+
+    local _RESULT
+    _RESULT="$(echo | openssl s_client -starttls postgres -connect "${_SERVER}":5432 -servername "${_SERVER}" 2> /dev/null | openssl x509 -noout -enddate | grep -F 'notAfter=' | cut -d'=' -f2)"
+    readonly _RESULT
+
+    [ -z "${_RESULT}" ] \
+        && echo "FAIL#Unable to get cert's end date from ${_SERVER}:5432" \
+        && return 1
+
+    local _ENDDATE
+    _ENDDATE="$(date --date="${_RESULT}" --utc +%s)"
+    readonly _ENDDATE
+
+    ! echo "${_ENDDATE}" | grep -q -E "^[0-9]*$" \
+        && echo "FAIL#Unable to parse end date of certificate" \
+        && return 1
+
+    local _NOW _REMAINING_DAYS
+    _NOW="$(date --date now +%s)"
+    _REMAINING_DAYS="$(( (_ENDDATE - _NOW) / 86400 ))"
+    readonly _NOW _REMAINING_DAYS
+
+    [ -z "${_REMAINING_DAYS}" ] \
+        && echo "WARN#Only ${_REMAINING_DAYS} days left" \
+        && return 1
+
+    echo "OK#${_REMAINING_DAYS} days remaining"
+    return 0
+}
+
+checkPostgresSSLCertificate "${@}" && exit 0 || exit 1

script/monitor/generic/URL_CHECK.sh

@@ -1,7 +1,5 @@
 #!/bin/bash
 
-_URL="${1:?"URL of site missing"}"
-
 #curl:
 # --connect-timeout SECONDS  Maximum time allowed for connection
 # -k                         Allow connections to SSL sites without certs (H)
@@ -14,4 +12,51 @@ _URL="${1:?"URL of site missing"}"
 #grep:
 # -q                         Quite, no output just status codes
 # -F                         Interpret search term as plain text
-((curl --connect-timeout 10 --max-time 10 -k -s --head --no-progress-meter "${_URL}" | grep -qF '200 OK') && echo OK) || echo FAIL
+function checkUrl() {
+    local _URL _SEARCH_STRING
+    _URL="${1:?"URL of site missing"}"
+    _SEARCH_STRING="${2}"
+    readonly _URL _SEARCH_STRING
+
+    local _RESULT
+    if [ -z "${_SEARCH_STRING}" ]; then
+        _RESULT="$(curl --connect-timeout 10 --max-time 10 --no-progress-meter --verbose "${_URL}" 2>&1 | grep -o -E "(expire.*|HTTP.*200 OK)")"
+    else
+        _RESULT="$(curl --connect-timeout 10 --max-time 10 --no-progress-meter --verbose "${_URL}" 2>&1 | grep -o -E "(expire.*|HTTP.*200 OK|${_SEARCH_STRING})")"
+    fi
+    readonly _RESULT
+
+    ! echo "${_RESULT}" | grep -q -F '200 OK' \
+        && echo "FAIL#Status code 200 not found" \
+        && return 1
+
+    ! [ -z "${_SEARCH_STRING}" ] \
+        && ! echo "${_RESULT}" | grep -q -F "${_SEARCH_STRING}" \
+        && echo "FAIL#Search string not found" \
+        && return 1
+
+    local _ENDDATE
+    _ENDDATE="$(echo "${_RESULT}" | grep -F 'expire' | cut -d':' -f2-)"
+    _ENDDATE="$(date --date="${_ENDDATE}" --utc +%s)"
+    readonly _ENDDATE
+
+    ! echo "${_ENDDATE}" | grep -q -E "^[0-9]*$" \
+        && echo "FAIL#Unable to parse end date of certificate" \
+        && return 1
+
+    local _NOW _REMAINING_DAYS
+    _NOW="$(date --date now +%s)"
+    _REMAINING_DAYS="$(( (_ENDDATE - _NOW) / 86400 ))"
+    readonly _NOW _REMAINING_DAYS
+
+    # less than 30 days remaining => should be warned
+    [ "${_REMAINING_DAYS}" -le "30" ] \
+        && echo "WARN#Certificate: only ${_REMAINING_DAYS} days left" \
+        && return 1
+
+    echo "OK#Certificate: ${_REMAINING_DAYS} days remaining"
+    return 0
+}
+
+#((curl --connect-timeout 10 --max-time 10 -k -s --head --no-progress-meter "${_URL}" | grep -qF '200 OK') && echo OK) || echo FAIL
+checkUrl "${1}" "${2}" && exit 0 || exit 1

script/monitor/generic/ZFS_POOL_CHECK.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+_REMOTE_HOST="${1:?"FQDN of server missing: e.g. host.example.net[:port]"}"
+_ZFS_POOL="${2:?"Name of zfs pool missing: e.g. zpool1"}"
+_REMOTE_HOSTNAME_FQDN="${_REMOTE_HOST%%:*}"            #Removes longest  matching pattern ':*' from the end
+_REMOTE_HOSTNAME_SHORT="${_REMOTE_HOSTNAME_FQDN%%.*}"  #Removes longest  matching pattern '.*' from the end
+_REMOTE_PORT="${_REMOTE_HOST}:"
+_REMOTE_PORT="${_REMOTE_PORT#*:}"                      #Removes shortest matching pattern '*:' from the begin
+_REMOTE_PORT="${_REMOTE_PORT%%:*}"                     #Removes longest  matching pattern ':*' from the end
+_REMOTE_PORT="${_REMOTE_PORT:-"22"}"
+_REMOTE_USER="monitoring"
+_SOCKET='~/.ssh/%r@%h:%p'
+
+
+
+function checkOrStartSSHMaster() {
+    timeout --preserve-status 1 ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} 2>&1 | grep -q -F 'Master running' \
+        && return 0
+
+    ssh -O stop -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} &> /dev/null
+    ssh -o ControlMaster=auto \
+        -o ControlPath=${_SOCKET} \
+        -o ControlPersist=65 \
+        -p ${_REMOTE_PORT} \
+        -f ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} exit &> /dev/null \
+        && return 0
+
+    echo "FAIL#SSH connection (setup ok?)"
+    return 1
+}
+
+function testPool(){
+    checkOrStartSSHMaster \
+        || return 1
+
+    local _RESPONSE="$(ssh -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} 'zpool status ${_ZFS_POOL} | grep -F scrub')"
+    local _RESULT=$(echo "${_RESPONSE}" | grep -F 'scrub repaired 0B' | grep -F '0 errors')
+    _RESULT="${_RESULT#*on}"  #Removes shortest matching pattern '*on' from the begin
+
+    [ -z "${_RESULT}" ] \
+        && echo "FAIL#CHECK POOL: ${_ZFS_POOL}" \
+        && return 0
+
+    echo "OK#Scrubbed on ${_RESULT}."
+    return 0
+}
+
+testPool && exit 0
+
+exit 1

script/monitor/generic/ZFS_SYNC_CHECK.sh

@@ -30,8 +30,7 @@ _DEBUG_PATH="/tmp/monitor/"
 
 
 function checkOrStartSSHMaster() {
-    timeout --preserve-status 1 "ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN}" &> /dev/null \
+    timeout --preserve-status 1 ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} 2>&1 | grep -q -F 'Master running' \
-        && echo "master checked" \
         && return 0
 
     ssh -O stop -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} &> /dev/null
@@ -75,8 +74,8 @@ function checkSync() {
     for _COMPOSITION_PATH in ${_COMPOSITIONS}*; do
 
         # If remote host is found than it is responsible for this container-composition, otherwise skip
-        #   (grep -E "^something" means. Line has to start with "something".)
+        #   (grep -E "^[[:blank:]]*something" means. Line has to start with "something", leading blank chars are ok.)
-        grep -E "^${_REMOTE_HOSTNAME_SHORT}" "${_COMPOSITION_PATH}/zfssync-hosts" &> /dev/null \
+        grep -E "^[[:blank:]]*${_REMOTE_HOSTNAME_SHORT}" "${_COMPOSITION_PATH}/zfssync-hosts" &> /dev/null \
             || continue;
 
         _COMPOSITION_NAME="${_COMPOSITION_PATH##*/}"   #Removes longest  matching pattern '*/' from the begin

script/monitor/generic/ZFS_USAGE_CHECK.sh

@@ -13,8 +13,7 @@ _SOCKET='~/.ssh/%r@%h:%p'
 
 
 function checkOrStartSSHMaster() {
-    timeout --preserve-status 1 "ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN}" &> /dev/null \
+    timeout --preserve-status 1 ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} 2>&1 | grep -q -F 'Master running' \
-        && echo "master checked" \
         && return 0
 
     ssh -O stop -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} &> /dev/null

script/monitor/setupMonitoringHost.sh

@@ -15,6 +15,20 @@ _DEFINITIONS="${_CIS_ROOT:?"Missing CIS_ROOT"}definitions/${_DOMAIN:?"Missing DO
 
 
 
+function checkPreconditions() {
+    [ -d "${_DEFINITIONS:?"Missing DEFINITIONS"}monitor/checks" ] \
+        && return 0
+
+    echo "No folder for your defined checks found: ${_DEFINITIONS:?"Missing DEFINITIONS"}monitor/checks"
+    echo "Please create it and add all your custom monitoring checks there, following this convention: 'NAME_OF_THE_CHECK.on'"
+    echo "A check has to be switched 'on' to be executed, so you can rename a check to 'NAME_OF_THE_CHECK.off' and it will be ignored."
+    echo
+    echo "You can copy the file '/cis/script/monitor/checks/EXAMPLE_CHECK.off' to your check definitions folder and modify it."
+    return 1
+}
+
+
+
 function printSelectedDefinition() {
     local _FILE_DEFINED_DOMAIN _FILE_DEFINED_DEFAULT
     _FILE_DEFINED_DOMAIN="${_DEFINITIONS:?"Missing DEFINITIONS"}monitor/${1:?"Missing CURRENT_FULLFILE"}"
@@ -50,6 +64,7 @@ function setupPublicFile() {
 }
 
 echo "Setup the monitoring host that monitors the others ... " \
+    && checkPreconditions \
     && setupPublicFile "check.html" \
     && setupPublicFile "check.css" \
     && setupPublicFile "logo.png" \

script/ssl/Dockerfile

@@ -0,0 +1,20 @@
+###########################################################################
+# Dockerfile to build a Container to update TLS Certificates automatically.
+# Based on latest Ubuntu LTS
+###########################################################################
+# See https://hub.docker.com/_/ubuntu
+FROM ubuntu:latest
+
+# Update repositories
+RUN echo Version 20251030v1
+RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt-get install -y apt-utils
+
+#### BEGIN INSTALLATION ###################################################
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y cron curl dnsutils openssh-client
+
+ADD acme.sh-3.1.1.tar.gz /tmp/acme.sh-setup/
+COPY renewCerts.sh /renewCerts.sh
+COPY start.sh /start.sh 
+
+# Run the command on container startup
+CMD ["bash", "/start.sh"]

script/ssl/README.md

@@ -0,0 +1,52 @@
+Issuing SSL certificates
+========================
+There are two modes you can use the script `renewCerts.sh`.
+
+1. dns
+2. http
+
+
+
+Dns mode
+--------
+This mode is meant to use inside a docker container defined by the `Dockerfile`.
+To configure, build and run the Container there is a file `docker-compose.yml.template`.
+You can copy this file to `docker-compose.yml` and set the needed environment variables there.
+
+- __AUTOACME_CONTAINER_HOSTNAME__  
+  is used to enable the use of the host name within the container.
+  For example, for meaningful commit messages.
+- __AUTOACME_GIT_REPOSITORY_VIA_SSH__ (optional)  
+  is used to specify a Git repository to which the keys and certificates are transferred.
+  Therefore, SSH keys are generated on first launch (`docker compose up -d`) and the repository is cloned to `~/acmeResults/`.
+  The public key must be granted __write access__ to the repository  
+  (e.g. as repository's deploy key).
+  The key can be viewed via `docker compose logs`.
+- __AUTOACME_PATH_IN_GIT_REPOSITORY__  (optional)  
+  specifies a path inside the repository were the certiticates are saved.  
+  (e.g. AUTOACME_PATH_IN_GIT_REPOSITORY="/foo/bar/" => /root/autoACME/foo/bar/your-domain.net/fullchain.crt)
+- __AUTOACME_DNS_PROVIDER__  
+  sets the provider modul of acme.sh used to communicate with your domain provider.  
+  (For further information see: https://github.com/acmesh-official/acme.sh/wiki/dnsapi)
+
+You may have to set additional environment variables depending on your provider...
+
+
+
+### Manual docker commands
+Instead of using `docker compose` you can build and run the container manually:
+```
+docker build -t cis/autoacme .
+docker run --name autoacme -d cis/autoacme
+```
+This may be useful for investiagtion...
+
+
+Http mode
+---------
+If you plan to use `renewCerts.sh` directly on your host computer this mode may fit your needs.
+Here you need a `nginx` webserver. The domain have to point to it and following configuration is needed:
+
+1. The content of folder `/var/www/letsencrypt/.well-known/acme-challenge/` has to be accessable via `http://your-domain.net/.well-known/acme-challenge/`
+2. The certificates are stored to `/etc/nginx/ssl`. If this folder is a git repository then changes will be commited and pushed.
+3. An entry into the crontab is needed to do automatic updates.

script/ssl/docker-compose.yml.template

@@ -0,0 +1,18 @@
+services:
+  autoacme:
+    container_name: autoacme
+    image: cis/autoacme
+    build: .
+    restart: unless-stopped
+    volumes:
+      - /etc/timezone:/etc/timezone:ro
+      - /etc/localtime:/etc/localtime:ro
+    environment:
+      AUTOACME_CONTAINER_HOSTNAME: ${HOSTNAME:?"HINT - You may run 'export HOSTNAME' first."}
+      AUTOACME_GIT_REPOSITORY_VIA_SSH: 'ssh://git@git.your-domain.net/your-repo.git'
+      # Optionally you can set a path inside the git repository, requires a repository.
+      AUTOACME_PATH_IN_GIT_REPOSITORY: 'hosts/all/etc/ssl/domains/'
+      # See: https://github.com/acmesh-official/acme.sh/wiki/dnsapi   and search your provider like 'hetzner' e.g. 
+      AUTOACME_DNS_PROVIDER: 'dns_hetzner'
+      HETZNER_Token: 'your-token'
+

script/ssl/renewCerts.sh

@@ -0,0 +1,550 @@
+#!/bin/bash
+
+# curl http://your.domain.net/.well-known/acme-challenge/test
+# curl http://85.183.145.8/.well-known/acme-challenge/test
+# /var/www/letsencrypt/.well-known/acme-challenge
+
+function checkConfigViaHttp() {
+    local _DOMAIN _MODE _LOCAL_FOLDER
+    _MODE="${1:?"checkConfigViaHttp(): Missing first parameter MODE"}"
+    _DOMAIN="${2:?"checkConfigViaHttp(): Missing second parameter DOMAIN"}"
+    _LOCAL_FOLDER="/var/www/letsencrypt/.well-known/acme-challenge/"
+    readonly _DOMAIN _MODE _LOCAL_FOLDER
+
+    local _LOCAL_FILE _LOCAL_URL _PUBLIC_URL
+    _LOCAL_FILE="${_LOCAL_FOLDER}${_DOMAIN}"
+    _LOCAL_URL="http://localhost/.well-known/acme-challenge/${_DOMAIN}"
+    _PUBLIC_URL="http://${_DOMAIN}/.well-known/acme-challenge/${_DOMAIN}"
+    readonly _LOCAL_FILE _LOCAL_URL _PUBLIC_URL
+
+    # Skip check if mode is not http
+    [ "${_MODE}" != "http" ] \
+        && return 0
+
+    # Fail because wildcard certificate
+    [ "${_MODE}" == "http" ] \
+        && isWildcardCertificate "${_DOMAIN}" \
+        && echo "Wildcard certificates are not supported via HTTP." \
+        && return 1
+
+    _CHECK="Available on $(hostname)@$(date)"
+
+    echo -n "Check domain '${_DOMAIN}'..." \
+        && [ -d "${_LOCAL_FOLDER}" ] \
+        && echo "${_CHECK}" > "${_LOCAL_FILE}" \
+        && curl -4s "${_PUBLIC_URL}" | grep -q "${_CHECK}" \
+        && echo " Done" \
+        && return 0
+
+    echo
+    echo "FAILED: configuration of domain '${_DOMAIN}' is INCORRECT:"
+    echo -n "  ${_PUBLIC_URL} was not found."
+
+    curl -4s "${_LOCAL_URL}" | grep -q "${_CHECK}" \
+        && echo " (check DNS first)" \
+        || echo " (check Webserver first)"
+
+    return 1
+}
+
+function isActive() {
+    local _DOMAIN _MODE _RESULT_CERTS
+    _RESULT_CERTS="${RESULT_CERTS:?"isActive(): Missing global parameter RESULT_CERTS"}"
+    _MODE="${1:?"isActive(): Missing first parameter MODE"}"
+    _DOMAIN="${2:?"isActive(): Missing second parameter DOMAIN"}"
+    readonly _DOMAIN _MODE _RESULT_CERTS
+
+    # If mode is dns the domain is active always
+    [ "${_MODE}" == "dns" ] \
+        && return 0
+
+    nginx -T 2> /dev/null | grep -q "${_RESULT_CERTS}${_DOMAIN}/fullchain.crt" \
+        && return 0
+
+    echo "Domain '${_DOMAIN}' is inaktiv and therefore it will be skipped."
+    return 1
+}
+
+function isGitRepository() {
+    local _FOLDER
+    _FOLDER="${1:?"isGitRepository(): Missing first parameter FOLDER"}"
+    readonly _FOLDER
+
+    git -C "${_FOLDER}" ls-tree main &> /dev/null \
+        && return 0
+
+    return 1
+}
+
+function isWildcardCertificate() {
+    local _DOMAIN
+    _DOMAIN="${1:?"isWildcardCertificate(): Missing first parameter DOMAIN"}"
+    readonly _DOMAIN
+
+    echo "${_DOMAIN}" | grep -q -F "_." \
+        && return 0
+
+    echo "${_DOMAIN}" | grep -q -F "*." \
+        && return 0
+
+    return 1
+}
+
+function tryGitPush() {
+    local _DOMAIN _NOW _RESULT_CERTS
+    _RESULT_CERTS="${RESULT_CERTS:?"tryGitPush(): Missing global parameter RESULT_CERTS"}"
+    _DOMAIN="${1:?"tryGitPush(): Missing first parameter DOMAIN"}"
+    _NOW="$(date +%Y%m%d_%H%M)"
+    readonly _DOMAIN _NOW _RESULT_CERTS
+
+    ! isGitRepository "${_RESULT_CERTS}" \
+        && echo \
+        && echo "Folder '${_RESULT_CERTS}' is not part of a git repository, therefore nothing will be pushed." \
+        && return 1
+
+    pushd "${_RESULT_CERTS}" > /dev/null
+    git pull > /dev/null
+    git add * > /dev/null
+    git commit -m "${_NOW} - Certificate for '${_DOMAIN}' was updated." \
+        && git push > /dev/null \
+        && popd > /dev/null \
+        && echo "SUCCESS: certificate for '${_DOMAIN}' pushed." \
+        && return 0
+
+   popd > /dev/null
+   echo "FAILED: unable to push certificate for '${_DOMAIN}'."
+   return 0
+}
+
+function own() {
+    ! [ -d "${RESULT_CERTS:?"own(): Missing global parameter RESULT_CERTS"}" ] \
+        && echo "Trying to derive domain names from subfolders of '${RESULT_CERTS}', but it is not a folder!" \
+        && return 1
+
+    local _DOMAINS _MODE
+    _DOMAINS=("${RESULT_CERTS}"*)
+    _MODE="${1:?"own(): Missing first parameter MODE"}"
+    readonly _DOMAINS _MODE
+
+    local _domain
+    for _domain in "${_DOMAINS[@]}"; do
+        # just take names of folders
+        ! [ -d "${_domain}" ] && continue
+        # cut pfad (like basename)
+        _domain="${_domain##*/}"
+
+        # folder default => skip
+        [ "${_domain}" == "default" ] && continue
+
+        case "${_MODE}" in
+            dns)
+                # dns supports all options
+                ;;
+            http)
+                # http and wildcard certifikate => skip
+                isWildcardCertificate "${_domain}" && continue
+                # ssl on domain inaktiv => skip
+                ! isActive "{_MODE}" "${_domain}" && continue
+                ;;
+            *)
+                echo "Unknown mode: ${_MODE}"
+                return 1
+                ;;
+        esac
+
+        single "${_MODE}" "${_domain}" "${2}"
+    done
+
+    return 0
+}
+
+function continueIssuingCertificate() {
+    local _CERT_FILE_FULLCHAIN _DOMAIN
+    _CERT_FILE_FULLCHAIN="${1:?"continueIssuingCertificate(): Missing first parameter CERT_FILE_FULLCHAIN"}"
+    _DOMAIN="${2:?"continueIssuingCertificate(): Missing second parameter DOMAIN"}"
+    local _CERT_FILE_FULLCHAIN _DOMAIN
+
+    local _PRETTY_DOMAIN
+    _PRETTY_DOMAIN="$(printPrettyDomain ${_DOMAIN})"
+    readonly _PRETTY_DOMAIN
+
+    # forced => should be issued
+    [ "${3:-""}" == "--force" ] \
+        && echo "Certificate for domain '${_PRETTY_DOMAIN}' is forced to be issued." \
+        && return 0
+
+    # no cert => should be issued
+    ! [ -f "${_CERT_FILE_FULLCHAIN}" ] \
+        && echo "No certificate for domain '${_PRETTY_DOMAIN}', so it will be issued." \
+        && return 0
+
+    local _ENDDATE _NOW _REMAINING_DAYS
+    _ENDDATE="$(openssl x509 -enddate -noout -in ${_CERT_FILE_FULLCHAIN} | cut -d= -f2)"
+    _ENDDATE="$(date --date="${_ENDDATE}" --utc +%s)"
+
+    _NOW="$(date --date now +%s)"
+    _REMAINING_DAYS="$(( (_ENDDATE - _NOW) / 86400 ))"
+    readonly _ENDDATE _NOW _REMAINING_DAYS
+
+    # less than 30 days remaining => should be issued
+    [ "${_REMAINING_DAYS}" -le "30" ] \
+        && echo "Certificate for domain '${_PRETTY_DOMAIN}' (${_REMAINING_DAYS} days remaining) will be issued." \
+        && return 0
+
+    echo "Certificate for domain '${_PRETTY_DOMAIN}' (${_REMAINING_DAYS} days remaining) will be skipped."
+    return 1
+}
+
+function printBaseDomain() {
+    local _DOMAIN
+    _DOMAIN="${1:?"printBaseDomain(): Missing first parameter DOMAIN"}"
+    readonly _DOMAIN
+
+    local _BASE_DOMAIN
+    # cut front '*.' or '_.'
+    _BASE_DOMAIN="${_DOMAIN#\*.}"
+    _BASE_DOMAIN="${_BASE_DOMAIN#_.}"
+    readonly _BASE_DOMAIN
+
+    echo "${_BASE_DOMAIN}" \
+        && return 0
+
+    return 1
+}
+
+function printPrettyDomain() {
+    local _BASE_DOMAIN _DOMAIN
+    _DOMAIN="${1:?"printPrettyDomain(): Missing first parameter DOMAIN"}"
+    _BASE_DOMAIN="$(printBaseDomain ${_DOMAIN})"
+    readonly _BASE_DOMAIN _DOMAIN
+
+    isWildcardCertificate "${_DOMAIN}" \
+        && echo "*.${_BASE_DOMAIN}" \
+        && return 0
+
+    echo "${_DOMAIN}" \
+        && return 0
+
+    return 1
+}
+
+function printFullDomainFolder() {
+    local _BASE_DOMAIN _DOMAIN _RESULT_CERTS
+    _RESULT_CERTS="${RESULT_CERTS:?"printFullDomainFolder(): Missing global parameter RESULT_CERTS"}"
+    _DOMAIN="${1:?"printFullDomainFolder(): Missing first parameter DOMAIN"}"
+    _BASE_DOMAIN="$(printBaseDomain ${_DOMAIN})"
+    readonly _BASE_DOMAIN _DOMAIN _RESULT_CERTS
+
+    isWildcardCertificate "${_DOMAIN}" \
+        && echo "${_RESULT_CERTS}_.${_BASE_DOMAIN}/" \
+        && return 0
+
+    echo "${_RESULT_CERTS}${_DOMAIN}/" \
+        && return 0
+
+    return 1
+}
+
+function prepareFullDomainFolder() {
+    local _DOMAIN _DOMAIN_FOLDER
+    _DOMAIN="${1:?"prepareFullDomainFolder(): Missing first parameter DOMAIN"}"
+    _DOMAIN_FOLDER="$(printFullDomainFolder "${_DOMAIN}")"
+    readonly _DOMAIN _DOMAIN_FOLDER
+
+    [ -d "${_DOMAIN_FOLDER}" ] \
+        && return 0
+
+    # create folder for results
+    echo -n "Creating folder '${_DOMAIN_FOLDER}'... " \
+        && mkdir -p "${_DOMAIN_FOLDER}" \
+        && echo "Done"
+
+    [ -d "${_DOMAIN_FOLDER}" ] \
+        && return 0
+
+    return 1
+}
+
+function prepareAndCheckAliasDomain() {
+    local _ALIAS_DOMAIN _DOMAIN
+    _DOMAIN="${1:?"prepareAndCheckAliasDomain(): Missing first parameter DOMAIN"}"
+    _ALIAS_DOMAIN="${2:?"prepareAndCheckAliasDomain(): Missing second parameter ALIAS_DOMAIN"}"
+    readonly _ALIAS_DOMAIN _DOMAIN
+
+    local _BASE_DOMAIN _CHALLENGE_ALIAS_DOMAIN_FILE _DOMAIN_FOLDER
+    _BASE_DOMAIN="$(printBaseDomain ${_DOMAIN})"
+    _DOMAIN_FOLDER="$(printFullDomainFolder ${_DOMAIN})"
+    _CHALLENGE_ALIAS_DOMAIN_FILE="${_DOMAIN_FOLDER}challenge-alias-domain"
+    readonly _BASE_DOMAIN _CHALLENGE_ALIAS_DOMAIN_FILE _DOMAIN_FOLDER
+
+    [ -d "${_DOMAIN_FOLDER}" ] \
+        && [ "$(dig +short _acme-challenge.${_BASE_DOMAIN} CNAME)" == "_acme-challenge.${_ALIAS_DOMAIN}." ] \
+        && echo "${_ALIAS_DOMAIN}" > "${_CHALLENGE_ALIAS_DOMAIN_FILE}" \
+        && echo "SUCCESS: alias domain '${_ALIAS_DOMAIN}' is used when issuing certificates for '${_BASE_DOMAIN}' via DNS." \
+        && return 0
+
+    echo "FAILED: unable to use alias domain '${_ALIAS_DOMAIN}' to issue certificates for '${_BASE_DOMAIN}'."
+    echo "        You have to configure your domain '${_BASE_DOMAIN}' first before you can use the alias domain as proof."
+    echo "        So check if there is a CNAME entry '_acme-challenge.${_BASE_DOMAIN}' pointing to:"
+    echo "          - '_acme-challenge.${_ALIAS_DOMAIN}'"
+    return 1
+}
+
+function single() {
+    local _ACME_FILE _DOMAIN _MODE _RESULT_CERTS
+    _RESULT_CERTS="${RESULT_CERTS:?"single(): Missing global parameter RESULT_CERTS"}"
+    _ACME_FILE="${ACME_FILE:?"single(): Missing global parameter ACME_FILE"}"
+    _MODE="${1:?"single(): Missing first parameter MODE"}"
+    _DOMAIN="${2:?"single(): Missing second parameter DOMAIN"}"
+    readonly _ACME_FILE _DOMAIN _MODE _RESULT_CERTS
+
+    local _BASE_DOMAIN _CHALLENGE_ALIAS_DOMAIN_FILE _DOMAIN_FOLDER _PRETTY_DOMAIN
+    _BASE_DOMAIN="$(printBaseDomain ${_DOMAIN})"
+    _DOMAIN_FOLDER="$(printFullDomainFolder ${_DOMAIN})"
+    _PRETTY_DOMAIN="$(printPrettyDomain ${_DOMAIN})"
+    _CHALLENGE_ALIAS_DOMAIN_FILE="${_DOMAIN_FOLDER}challenge-alias-domain"
+    readonly _BASE_DOMAIN _CHALLENGE_ALIAS_DOMAIN_FILE _DOMAIN_FOLDER _PRETTY_DOMAIN
+
+    ! [ -f "${_ACME_FILE}" ] \
+        && echo "Program 'acme.sh' seams not to be installed. Try run 'renewCerts.sh --setup'." \
+        && return 1
+
+    # cancel on broken configuration
+    ! checkConfigViaHttp "${_MODE}" "${_DOMAIN}" \
+        && return 1
+
+    # cancel if folder is not prepared
+    ! [ -d "${_DOMAIN_FOLDER}" ] \
+	    && echo "Certificate of domain '${_PRETTY_DOMAIN}' skipped because of missing folder:" \
+        && echo "  - '${_DOMAIN_FOLDER}'" \
+        && return 1
+
+    # check enddate if third parameter is not --force
+    ! continueIssuingCertificate "${_DOMAIN_FOLDER}fullchain.crt" "${_DOMAIN}" "${3:-""}" \
+        && return 0
+
+    # backup the keys
+    [ -f "${_DOMAIN_FOLDER}fullchain.crt" ] \
+        && cp "${_DOMAIN_FOLDER}fullchain.crt" "${_DOMAIN_FOLDER}fullchain.crt.bak"
+    [ -f "${_DOMAIN_FOLDER}private.key" ] \
+        && cp --preserve=mode,ownership "${_DOMAIN_FOLDER}private.key" "${_DOMAIN_FOLDER}private.key.bak"
+
+    local _OPTIONS
+    # always --force because we check expiring on ourself
+    # _OPTIONS="--issue --force --test"
+    _OPTIONS="--issue --force"
+    if [ "${_MODE}" == "dns" ]; then
+        _OPTIONS="${_OPTIONS} --dns ${AUTOACME_DNS_PROVIDER:?"single(): Missing global parameter AUTOACME_DNS_PROVIDER"}"
+        [ -f "${_CHALLENGE_ALIAS_DOMAIN_FILE}" ] \
+            && _OPTIONS="${_OPTIONS} --challenge-alias $(cat "${_CHALLENGE_ALIAS_DOMAIN_FILE}")"
+        isWildcardCertificate "${_DOMAIN}" \
+            && _OPTIONS="${_OPTIONS} --domain ${_PRETTY_DOMAIN}"
+    elif [ "${_MODE}" == "http" ]; then
+        _OPTIONS="${_OPTIONS} --webroot /var/www/letsencrypt"
+    fi
+    readonly _OPTIONS
+
+    ${_ACME_FILE} ${_OPTIONS} \
+        --domain "${_BASE_DOMAIN}" \
+        --server "letsencrypt" \
+        --keylength "ec-384" \
+        --fullchain-file "${_DOMAIN_FOLDER}fullchain.crt" \
+        --key-file "${_DOMAIN_FOLDER}private.key" \
+        && openssl pkcs12 -export -in "${_DOMAIN_FOLDER}fullchain.crt" -inkey "${_DOMAIN_FOLDER}private.key" -out "${_DOMAIN_FOLDER}bundle.pkx" -passout pass: \
+        && echo "Certificate of domain '${_PRETTY_DOMAIN}' was updated." \
+        && tryGitPush "${_PRETTY_DOMAIN}" \
+        && return 0
+
+    echo "Certificate of domain '${_PRETTY_DOMAIN}' remains unchanged."
+    return 0
+}
+
+function isInstalled() {
+    local _ACME_FILE
+    _ACME_FILE="${ACME_FILE:?"isInstalled(): Missing global parameter ACME_FILE"}"
+    readonly _ACME_FILE
+
+    [ -f "${_ACME_FILE}" ] \
+        && echo "Following version of acme.sh is installed:" \
+        && echo "------------------------------------------" \
+        && ${_ACME_FILE} --version | tail -n 1 \
+        && return 0
+
+    return 1
+}
+
+function extractTarArchive() {
+    local _ACME_SETUP_FILE _ACME_TAR_FILE
+    _ACME_SETUP_FILE="${ACME_SETUP_FILE:?"extractTarArchive(): Missing global parameter ACME_SETUP_FILE"}"
+    _ACME_TAR_FILE="${ACME_TAR_FILE:?"extractTarArchive(): Missing global parameter ACME_TAR_FILE"}"
+    readonly _ACME_SETUP_FILE _ACME_TAR_FILE
+
+    # extracted file already exists
+    [ -f "${_ACME_SETUP_FILE}" ] \
+        && return 0
+
+    [ -f "${_ACME_TAR_FILE}" ] \
+        && mkdir -p "/tmp/acme.sh-setup/" \
+        && tar -xzf "${_ACME_TAR_FILE}" -C "/tmp/acme.sh-setup/" \
+        && [ -f "${_ACME_SETUP_FILE}" ] \
+        && return 0
+
+    echo "Missing setup file '${_ACME_SETUP_FILE}' after trying to extract '${_ACME_TAR_FILE}'"
+    return 1
+}
+
+function setup() {
+    local _ACME_SETUP_FILE
+    _ACME_SETUP_FILE="${ACME_SETUP_FILE:?"setup(): Missing global parameter ACME_SETUP_FILE"}"
+    readonly _ACME_SETUP_FILE
+
+    isInstalled \
+        && return 0
+
+    ! [ $(id -u) == 0 ] \
+        && echo "Setup requires execution as user 'root'." \
+        && exit 1
+
+    ! [ "$(echo $HOME)" == "/root" ] \
+        && echo "The setup is executed with 'root' privileges but not in the 'root' user environment." \
+        && exit 1
+
+    ! extractTarArchive \
+        && exit 1
+
+    echo "Starting install of acme.sh:"
+    echo "----------------------------"
+    pushd "${_ACME_SETUP_FILE%/*}" > /dev/null 2>&1    #Removes shortest matching pattern '/*' from the end
+    ./acme.sh --install --no-cron --no-profile 2>&1
+    popd > /dev/null 2>&1
+    isInstalled \
+        && echo \
+        && echo 'Now this script can be added into cron-tab (crontab -e), like this e.g.:' \
+        && echo \
+        && echo '# Each day at 6:00am renew certificates:' \
+        && echo '0 6 * * * /renewCerts.sh --http --own > /var/log/renewCerts.sh.log 2>&1' \
+        && return 0
+
+    echo "Something went wrong during setup."
+    return 1
+}
+
+function usage() {
+    echo
+    echo 'Commands:'
+    echo '  --prepare DOMAIN --usingAlias ALIAS-DOMAIN  : Prepares a domain to issue certificate using an alias domain in DNS mode.'
+    echo '                                                    See: https://github.com/acmesh-official/acme.sh/wiki/DNS-alias-mode'
+    echo '  --dns            --single DOMAIN [--force]  : Issues a certificate for the given domain using DNS mode.'
+    echo '  --http           --single DOMAIN [--force]  : Issues a certificate for the given domain using HTTP mode.'
+    echo
+    echo ' (--dns|--http)    --own [--force]            : Iterates all domains found in RESULT_CERTS.'
+    echo
+    echo 'Current environment:'
+    echo "    Full name of this script:                      OWN_FULLNAME='${OWN_FULLNAME}'"
+    echo "  Configuration:"
+    echo "    Version of 'acme.sh' that will be installed:   ACME_VERSION='${ACME_VERSION}'"
+    echo "    Tar file containing the setup of 'acme.sh':    ACME_TAR_FILE='${ACME_TAR_FILE}'"
+    echo "    Setup file of 'acme.sh' after extraction:      ACME_SETUP_FILE='${ACME_SETUP_FILE}'"
+    echo "    Full name of the installed script 'acme.sh':   ACME_FILE='${ACME_FILE}'"
+    echo "  Output:"
+    echo "    Path were the issued certificate are saved:    RESULT_CERTS='${RESULT_CERTS}'"
+
+    return 0
+}
+
+function main() {
+
+    echo
+
+    [ -f "/autoACME.env" ] \
+        && source "/autoACME.env" \
+        && echo "[$(date)] Environment '/autoACME.env' loaded."
+
+    local ACME_FILE ACME_VERSION OWN_FULLNAME
+    OWN_FULLNAME="$(readlink -e ${0})"
+    ACME_FILE="/root/.acme.sh/acme.sh"
+    ACME_VERSION="acme.sh-3.1.1"
+    readonly ACME_FILE ACME_VERSION OWN_FULLNAME
+
+    local ACME_SETUP_FILE ACME_TAR_FILE RESULT_CERTS
+    ACME_SETUP_FILE="/tmp/acme.sh-setup/${ACME_VERSION}/acme.sh"
+    ACME_TAR_FILE="${OWN_FULLNAME%/*}/${ACME_VERSION}.tar.gz"
+    RESULT_CERTS="${AUTOACME_RESULT_CERTS%/}"    #Removes shortest matching pattern '/' from the end
+    RESULT_CERTS="${RESULT_CERTS:-"/etc/nginx/ssl"}/"
+    readonly ACME_SETUP_FILE ACME_TAR_FILE RESULT_CERTS
+
+    local REPOSITORY_URL
+    isGitRepository "${RESULT_CERTS}" \
+        && REPOSITORY_URL="$(git -C ${RESULT_CERTS} config --get remote.origin.url)"
+    readonly REPOSITORY_URL
+
+    case "${1}" in
+        --dns)
+            case "${2}" in
+                --single)
+                    echo "[$(date)] Issue single certificate '${3}' via DNS:" \
+                        && prepareFullDomainFolder "${3}" \
+                        && single "dns" "${3}" "${4}" \
+                        && return 0
+                    ;;
+                --own)
+                    echo "[$(date)] Renewing own certificates via DNS:"
+                    own "dns" "${3}" \
+                        && echo "Finished successfully." \
+                        && return 0
+                    ;;
+            esac
+            ;;
+        --http)
+            case "${2}" in
+                --single)
+                    echo "[$(date)] Issue single certificate '${3}' via HTTP:" \
+                        && prepareFullDomainFolder "${3}" \
+                        && single "http" "${3}" "${4}" \
+                        && echo \
+                        && echo "Checking configuration of nginx and restart the webserver:" \
+                        && echo "==========================================================" \
+                        && nginx -t && systemctl reload nginx \
+                        && return 0
+                    ;;
+                --own)
+                    echo "[$(date)] Renewing own certificates via HTTP:" \
+                        && own "http" "${3}" \
+                        && echo \
+                        && echo "Checking configuration of nginx and restart the webserver:" \
+                        && echo "==========================================================" \
+                        && nginx -t && systemctl reload nginx \
+                        && return 0
+                    ;;
+            esac
+            ;;
+        --prepare)
+            case "${3}" in
+                --usingAlias)
+                    echo "[$(date)] Prepare domain '${2}' using the alias-domain '${4}' via DNS:" \
+                        && prepareFullDomainFolder "${2}" \
+                        && prepareAndCheckAliasDomain "${2}" "${4}" \
+                        && return 0
+                    ;;
+                *)
+                    echo "Unknown command '${1}' '${2}' '${3}' '${4}'"
+                    usage
+                    return 1
+                    ;;
+            esac
+            ;;
+        --setup)
+            setup \
+                && return 0
+            ;;
+        *)
+            echo "Unknown command '${1}' '${2}'"
+            usage
+            return 1
+            ;;
+    esac
+
+    return 1
+}
+
+main "$@" && exit 0 || exit 1

script/ssl/start.sh

@@ -0,0 +1,161 @@
+#/bin/bash
+
+function createEnvironmentFile() {
+    local _ENVIRONMENT_FILE _REPOSITORY_FOLDER
+    _ENVIRONMENT_FILE="${ENVIRONMENT_FILE:?"createEnvironmentFile(): Missing global parameter ENVIRONMENT_FILE"}"
+    _REPOSITORY_FOLDER="${AUTOACME_REPOSITORY_FOLDER:?"createEnvironmentFile(): Missing global parameter AUTOACME_REPOSITORY_FOLDER"}"
+    readonly _ENVIRONMENT_FILE _REPOSITORY_FOLDER
+
+    # Save environment for cronjob
+    export -p | grep -v -E "(HOME|OLDPWD|PWD|SHLVL)" > "${_ENVIRONMENT_FILE}" \
+        && echo "SUCCESS: there values were exported into file: '${_ENVIRONMENT_FILE}'" \
+        && echo "  - AUTOACME_CONTAINER_HOSTNAME: ${AUTOACME_CONTAINER_HOSTNAME}" \
+        && echo "  - AUTOACME_DNS_PROVIDER: ${AUTOACME_DNS_PROVIDER}" \
+        && echo "  - AUTOACME_GIT_REPOSITORY_VIA_SSH: ${AUTOACME_GIT_REPOSITORY_VIA_SSH}" \
+        && echo "  - AUTOACME_PATH_IN_GIT_REPOSITORY: ${AUTOACME_PATH_IN_GIT_REPOSITORY}"
+
+    [ "${AUTOACME_GIT_REPOSITORY_VIA_SSH}" == "" ] \
+        && echo "declare -x AUTOACME_RESULT_CERTS=\"${AUTOACME_REPOSITORY_FOLDER#/}\"" >> "${_ENVIRONMENT_FILE}" \
+        && echo "SUCCESS: added AUTOACME_RESULT_CERTS (without git) into file '${_ENVIRONMENT_FILE}'." \
+        && echo "  - AUTOACME_RESULT_CERTS: ${AUTOACME_REPOSITORY_FOLDER#/}" \
+        && echo "        (depends on if there is a git repo and the path for the certs in it)"
+
+    ! [ "${AUTOACME_GIT_REPOSITORY_VIA_SSH}" == "" ] \
+        && echo "declare -x AUTOACME_RESULT_CERTS=\"${AUTOACME_REPOSITORY_FOLDER}${AUTOACME_PATH_IN_GIT_REPOSITORY#/}\"" >> "${_ENVIRONMENT_FILE}" \
+        && echo "SUCCESS: added AUTOACME_RESULT_CERTS (with git) into file '${_ENVIRONMENT_FILE}'." \
+        && echo "  - AUTOACME_RESULT_CERTS: ${AUTOACME_REPOSITORY_FOLDER}${AUTOACME_PATH_IN_GIT_REPOSITORY#/}" \
+        && echo "        (depends on if there is a git repo and the path for the certs in it)"
+
+    return 0
+}
+
+function ensureThereAreSSHKeys() {
+    grep -F 'ssh' "/root/.ssh/id_ed25519.pub" &> /dev/null \
+        && echo "SUCCESS: ssh-keys found, printing public key:" \
+        && cat "/root/.ssh/id_ed25519.pub" \
+        && return 0
+
+    # -t    type of the key pair
+    # -f    defines the filenames (we use the standard for the selected type here)
+    # -q    quiet, no output or interaction
+    # -N "" means the private key will not be secured by a passphrase
+    # -C    defines a comment
+    ssh-keygen \
+        -t ed25519 \
+        -f "/root/.ssh/id_ed25519" -q -N "" \
+        -C "$(date +%Y%m%d)-root@$(hostname -s)_onHost_${AUTOACME_CONTAINER_HOSTNAME%%.*}"
+
+    grep -F 'ssh' "/root/.ssh/id_ed25519.pub" &> /dev/null \
+        && echo "SUCCESS: ssh-keys generated, printing public key:" \
+        && cat "/root/.ssh/id_ed25519.pub" \
+        && return 0
+
+    echo
+    echo "FAILED: something went wrong during the generation of the ssh keys..."
+    echo "        These keys are mandantory to access the git repository."
+    echo "You can try to restart this script."
+    echo
+    return 1
+}
+
+function ensureGitIsInstalled() {
+    git --version &> /dev/null \
+        && return 0
+
+    echo \
+        && echo "Installing Git in 30s (ensure the SSH-Key is trusted and has write pemissions)... " \
+        && sleep 30 \
+        && DEBIAN_FRONTEND=noninteractive \
+        && apt-get install git -y &> /dev/null \
+        && echo "SUCCESS: $(git --version) is usable now." \
+        && return 0
+
+    echo
+    echo "FAILED: something went wrong during the installation of Git..."
+    echo "        Git is mandantory to push the keys into the specified repository."
+    echo "You can try to install git manually (apt install git)."
+    echo
+    return 1
+}
+
+function ensureRepositoryIsAvailableAndWritable() {
+    local _REPOSITORY_FOLDER
+    _REPOSITORY_FOLDER="${AUTOACME_REPOSITORY_FOLDER:?"ensureRepositoryIsAvailableAndWritable(): Missing global parameter AUTOACME_REPOSITORY_FOLDER"}"
+    readonly _REPOSITORY_FOLDER
+
+    [ -d "${_REPOSITORY_FOLDER}.git" ] \
+        && echo \
+        && git -C "${_REPOSITORY_FOLDER}" pull &> /dev/null \
+        && git -C "${_REPOSITORY_FOLDER}" push --dry-run &> /dev/null \
+        && echo "Writable repository found in folder '${_REPOSITORY_FOLDER}'." \
+        && return 0
+
+    ! [ -d "${_REPOSITORY_FOLDER}.git" ] \
+        && echo \
+        && echo "Cloning repository '${AUTOACME_GIT_REPOSITORY_VIA_SSH}'... " \
+        && GIT_SSH_COMMAND="ssh -o StrictHostKeyChecking=accept-new" git clone "${AUTOACME_GIT_REPOSITORY_VIA_SSH}" "${_REPOSITORY_FOLDER}" &> /dev/null \
+        && git -C "${_REPOSITORY_FOLDER}" config user.name "autoacme on ${AUTOACME_CONTAINER_HOSTNAME%%.*}" \
+        && git -C "${_REPOSITORY_FOLDER}" config user.email "autoacme@${AUTOACME_CONTAINER_HOSTNAME%%.*}" \
+        && git -C "${_REPOSITORY_FOLDER}" push --dry-run &> /dev/null \
+        && echo "SUCCESS: repository cloned into folder '${_REPOSITORY_FOLDER}' and it is writable." \
+        && return 0
+
+    echo
+    echo "FAILED: something went wrong during cloning the repository to '${_REPOSITORY_FOLDER}' from:"
+    echo "        - ${AUTOACME_GIT_REPOSITORY_VIA_SSH}"
+    echo
+    echo "1.) You can try to clone it manually into:  git clone ${AUTOACME_GIT_REPOSITORY_VIA_SSH} '${_REPOSITORY_FOLDER}'"
+    echo "2.) Check if the repositoty is writable:    git -C '${_REPOSITORY_FOLDER}' push --dry-run"
+    return 1
+}
+
+function prepareThisRuntimeForUsingGitOrIgnore() {
+    createEnvironmentFile \
+        || return 1
+
+    [ "${AUTOACME_GIT_REPOSITORY_VIA_SSH}" == "" ] \
+        && echo "There is no git repository specified." \
+        && echo "To distribute all keys and certificates via a git repository set environment variable:" \
+        && echo "  - AUTOACME_GIT_REPOSITORY_VIA_SSH" \
+        && echo \
+        && echo "FIRST AND ONLY WARNING: DO NOT USE ANY PUBLIC GIT SERVICE FOR THAT!" \
+        && echo \
+        && return 0
+
+    echo \
+        && ensureThereAreSSHKeys \
+        && ensureGitIsInstalled \
+        && ensureRepositoryIsAvailableAndWritable \
+        && return 0
+
+    echo "No job will run inside this container because there is an issue."
+    echo "The container keeps running for 10min, please check your setup..."
+    return 1
+}
+
+AUTOACME_REPOSITORY_FOLDER="/root/acmeResults/"
+ENVIRONMENT_FILE="/autoACME.env"
+
+echo
+echo '################################################################################'
+echo "# Container started at $(date +%F_%T) on host ${AUTOACME_CONTAINER_HOSTNAME}"
+echo '################################################################################'
+echo
+
+# Log start and truncate file: /autoACME.log
+echo > /autoACME.log
+
+# Generate SSH keys and setup Git if a repository is specified, on failure keep the container running
+prepareThisRuntimeForUsingGitOrIgnore \
+    || timeout --preserve-status 10m tail -f /autoACME.log
+
+# Ensure acme.sh ist installed
+/renewCerts.sh --setup >> /autoACME.log \
+    && echo >> /autoACME.log
+
+echo "Register following entry to crontab:" >> /autoACME.log
+echo "------------------------------------" >> /autoACME.log
+_CRON_ENTRY="$((RANDOM % 59)) $((RANDOM % 5)) * * * /renewCerts.sh --dns --own >> /autoACME.log 2>&1"
+echo "${_CRON_ENTRY}" | tee -a /autoACME.log | crontab -
+
+cron && tail -n 100 -f /autoACME.log