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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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of this license document, but changing it is not allowed.
Preamble
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
Infrastructure System (ISS)
Copyright (C) 2022 Pinheirii
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
Infrastructure System (ISS) Copyright (C) 2022 Pinheirii
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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Infrastructure System (ISS)
===========================
Setup a new host
----------------
### Preconditions
To deploy the system you have to clone this repository to the host as root user.
Therefore you have to register the SSH public key of that root user as deploy key to allow readonly access to this repository.
We use the modern ed25519 keys, so the public key of root is stored at this location:
1. First become root:
```sh
sudo -i
```
2. Set the long hostname:
```sh
hostnamectl set-hostname "the-new-unique-long-hostname (fqdn, eg.: host1.example.net)"
```
3. Update Ubuntu:
```sh
# DO NOT SKIP THIS STEP
apt update; apt upgrade -y
```
4. Install git if needed:
```sh
git --version > /dev/null || apt install git
```
5. If not exist generate the ssh key pair and print the public key of the user root:
```sh
# -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
cat "/root/.ssh/id_ed25519.pub" \
|| (ssh-keygen \
-t ed25519 \
-f "/root/.ssh/id_ed25519" -q -N "" \
-C "$(date +%Y%m%d):root@$(hostname -b)" \
&& cat "/root/.ssh/id_ed25519.pub")
```
This key has to be registerd via gitea web ui as deploy key into the repositories as documented in chapter "Register public host key".
### Register public host key
This is an example for `example.net` as domain of the host owner.
1. Repository `iss`, allow __readonly__ access only.
2. Repository `iss-definition-example.net`, allow __readonly__ access only.
3. Repository `iss-state-example.net`, allow __writable__ access.
### Clone the Infrastructure System (iss) repository
After you registered the printed root's public key of this host you can clone the repository and execute the setup script:
```sh
# Note the tailing '/iss', because we want to clone the repository to that folder
git clone ssh://git@git.example.dev:22448/iss.git /iss
# Execute the setup script
/iss/setupCoreOntoThisHost.sh
```
<br>
<br>
<br>
How it works
------------
We add a webhook to each gitea repository that belongs to ISS:
- __Taget URL:__ https://YOUR.JENKINS.DOMAIN/generic-webhook-trigger/invoke?token=YOUR_TOKEN
- __HTTP-Method:__ POST
- __Trigger On:__ Push Events
- __Branch filter:__ main
Then we configure a jenkins job with no SCM, but 'Generic Webhook Trigger' as build-trigger.
Here the same token must be used as for the 'Target URL' in gitea.
Finally we add 'shell execution' as build step there with this content:
```sh
cat <<EOD
Following public-key has to be authorized for user jenkins on the corresponding host:
=====================================================================================
EOD
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 ${JENKINS_URL} | cut -d/ -f3)" \
&& cat "${JENKINS_HOME}/.ssh/id_ed25519.pub")
# add your host here, note the tailing '&' to run it in parallel
ssh -o StrictHostKeyChecking=no jenkins@192.168.X.Y /iss/update_repositories.sh ( --scripts | --definitions | --states ) &
#wait for all background processes to complete
wait
echo "All complete"
```

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core/addAndCheckGitRepository.sh Executable file
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#!/bin/bash
#WARNING: Used for core functionality in setup.sh
# DO NOT rename the script and test changes well!
function checkPermissions(){
local _FOLDER _REPOSITORY
_FOLDER="${1:?"Missing first parameter FOLDER"}"
_RIGHTS="${2:?"Missing second parameter RIGHTS"}"
readonly _FOLDER _REPOSITORY
[ "${_RIGHTS}" == "readonly" ] \
&& [ -d "${_FOLDER}/.git" ] \
&& ! git -C "${_FOLDER}" push --dry-run &> /dev/null \
&& return 0
[ "${_RIGHTS}" == "writable" ] \
&& [ -d "${_FOLDER}/.git" ] \
&& git -C "${_FOLDER}" push --dry-run &> /dev/null \
&& return 0
echo "FAIL: The rights of the repository are incorrect: ("$(readlink -f ${0})")"
echo " - '${_FOLDER}' is not '${_RIGHTS}'"
echo " - check the settings of gitea."
return 1
}
function checkRemoteRepository() {
local _FOLDER _REPOSITORY
_FOLDER="${1:?"Missing first parameter FOLDER"}"
_REPOSITORY="${2:?"Missing second parameter REPOSITORY"}"
readonly _FOLDER _REPOSITORY
#Should exist after successful clone only, therefore the remote repository exists and was accessible.
[ -d "${_FOLDER}/.git" ] \
&& return 0
#Checks if repository exists and is accessible.
! [ -d "${_FOLDER}/.git" ] \
&& git ls-remote "${_REPOSITORY}" \
&& return 0
echo "FAIL: The remote repository is not accessible: ("$(readlink -f ${0})")"
echo " - '${_REPOSITORY}'"
echo " - check the settings of gitea."
return 1
}
function cloneOrPull {
local _FOLDER _REPOSITORY
_FOLDER="${1:?"Missing first parameter FOLDER"}"
_REPOSITORY="${2:?"Missing second parameter REPOSITORY"}"
readonly _FOLDER _REPOSITORY
! [ -d "${_FOLDER}/.git" ] \
&& git clone "${_REPOSITORY}" "${_FOLDER}" &> /dev/null \
&& return 0
[ -d "${_FOLDER}/.git" ] \
&& git -C "${_FOLDER}" pull &> /dev/null \
&& return 0
echo "FAIL: The local repository is not updatable: ("$(readlink -f ${0})")"
echo " - '${_FOLDER}'"
echo " - check your network and the permissions in gitea."
return 1
}
# Note that an unprivileged user can use this script successfully,
# if no user has to be added to the host because it already exists.
function addAndCheckGitRepository() {
local _FOLDER _REPOSITORY
_FOLDER="${1:?"Missing first parameter FOLDER"}"
_REPOSITORY="${2:?"Missing second parameter REPOSITORY: e.g. ssh://git@your.domain.com/iss.git "}"
_RIGHTS="${3:?"Missing third parameter RIGHTS: (readonly, writable) "}"
readonly _FOLDER _REPOSITORY
checkRemoteRepository "${_FOLDER}" "${_REPOSITORY}" \
&& cloneOrPull "${_FOLDER}" "${_REPOSITORY}" \
&& checkPermissions "${_FOLDER}" "${_RIGHTS}" \
&& echo "SUCCESS: The git repository is usable. ("$(readlink -f ${0})")" \
&& echo " - remote repository: '${_REPOSITORY}'" \
&& echo " - local repository: '${_FOLDER}' (${_RIGHTS})" \
&& return 0
echo "FAIL: The repository is not functional: ("$(readlink -f ${0})")"
echo " - remote repository: '${_REPOSITORY}'"
echo " - local repository: '${_FOLDER}'"
echo " - due to an error or insufficient rights or"
echo " - one check failed."
return 1
}
# sanitizes all parameters
addAndCheckGitRepository \
"$(echo ${1} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
"$(echo ${2} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
"$(echo ${3} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
&& exit 0 || exit 1

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core/addNormalUser.sh Executable file
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#!/bin/bash
#WARNING: Used for core functionality in setup.sh
# DO NOT rename the script and test changes well!
# Note that an unprivileged user can use this script successfully,
# if no user has to be added to the host because it already exists.
function addNormalUser() {
local _USER
_USER="${1:?"Missing first parameter USER"}"
readonly _USER
#The user already exists
id -u "${_USER}" &> /dev/null \
&& echo "SUCCESS: The user already exists: ("$(readlink -f ${0})")" \
&& echo " - '${_USER}'" \
&& return 0
[ "$(id -u)" == "0" ] \
&& adduser --gecos 'Normal user' --disabled-password "${_USER}" \
&& chown -R "${_USER}:${_USER}" "/home/${_USER}" \
&& echo "SUCCESS: The user was created: ("$(readlink -f ${0})")" \
&& echo " - '${_USER}'" \
&& echo " - no password was set, use passwd if needed" \
&& echo " - existing home directories were taken over" \
&& return 0
echo "FAIL: The user could not be created: ("$(readlink -f ${0})")"
echo " - '${_USER}'"
echo " - due to an error or insufficient rights."
return 1
}
# sanitizes all parameters
addNormalUser \
"$(echo ${1} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
&& exit 0 || exit 1

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core/addToCrontabEveryHour.sh Executable file
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#!/bin/bash
#WARNING: Used for core functionality in setup.sh
# DO NOT rename the script and test changes well!
# Note that an unprivileged user can use this script successfully,
# if no user has to be added to the host because it already exists.
function addToCrontabEveryHour() {
local _ROOT _MINUTE_VALUE _STRING
_ROOT="${0%%/core/*}/" #Removes longest matching pattern '/core/*' from the end
! [ -z "${2##*[!0-9]*}" ] && _MINUTE_VALUE=$((${2}%60)) # if second parameter is integer then (minute-value % 60) as safe guard
_STRING="${_MINUTE_VALUE:?"Missing MINUTE_VALUE"} * * * * ${1:?"Missing first parameter COMMAND"} > /dev/null 2>&1"
readonly _ROOT _MINUTE_VALUE _STRING
[ "$(id -u)" == "0" ] \
&& crontab -l | grep -qF "${_STRING:?"Missing CRON_STRING"}" \
&& echo "SUCCESS: Entry already is registered to crontab: ("$(readlink -f ${0})")" \
&& echo " - '${_STRING}'" \
&& return 0
[ "$(id -u)" == "0" ] \
&& echo "${_ROOT:?"Missing ROOT"}" | grep "home" &> /dev/null \
&& echo "SUCCESS: Although the entry will be skipped: ("$(readlink -f ${0})")" \
&& echo " - '${_STRING}'" \
&& echo " that is because the current environment is:" \
&& echo " - ${_ROOT}" \
&& return 0
[ "$(id -u)" == "0" ] \
&& (crontab -l; \
echo "# Every hour at ?:${_MINUTE_VALUE:?"Missing MINUTE_VALUE"}:"; \
echo "${_STRING:?"Missing CRON_STRING"}") | crontab - \
&& crontab -l | grep -qF "${_STRING:?"Missing CRON_STRING"}" \
&& echo "SUCCESS: Entry is registered to crontab now: ("$(readlink -f ${0})")" \
&& echo " - '${_STRING}'" \
&& return 0
echo "FAIL: Entry could not be registered to crontab: ("$(readlink -f ${0})")"
echo " - '${_STRING:?"Missing CRON_STRING"}'"
echo " - due to an error or insufficient rights."
return 1
}
# sanitizes all parameters
addToCrontabEveryHour \
"$(echo ${1} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
"$(echo ${2} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
&& exit 0 || exit 1

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core/defineAuthorizedKeysOfUser.sh Executable file
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#!/bin/bash
#WARNING: Used for core functionality in setup.sh
# DO NOT rename the script and test changes well!
function prepareFolder() {
local _HOME_FOLDER _SSH_FOLDER _USER
_SSH_FOLDER="${1:?"prepareFolder(): Missing parameter SSH_PATH"}"
_HOME_FOLDER="${_SSH_FOLDER%%/.ssh*}" #Removes longest matching pattern '/.ssh*' from the end
_USER="${_HOME_FOLDER##*/}" #Removes longest matching pattern '*/' from the begin
readonly _HOME_FOLDER _SSH_FOLDER _USER
! [ -d "${_HOME_FOLDER}" ] \
&& echo "FAIL: The home folder is unavailable: ("$(readlink -f ${0})")" \
&& echo " - '${_HOME_FOLDER}'" \
&& return 1
#The ssh folder already exists
[ -d "${_SSH_FOLDER}" ] \
&& [ "$(stat -c '%U:%G' "${_SSH_FOLDER}")" == "${_USER}:${_USER}" ] \
&& [ "$(stat -c '%a' "${_SSH_FOLDER}")" == "700" ] \
&& echo "SUCCESS: The ssh folder already exists: ("$(readlink -f ${0})")" \
&& echo " - '${_SSH_FOLDER}'" \
&& return 0
#The calling user can create its own folder
! [ -d "${_SSH_FOLDER}" ] \
&& [ "${_USER:?"Missing USER"}" == "$(whoami)" ] \
&& mkdir -p "${_SSH_FOLDER}" \
&& chown "${_USER}:${_USER}" "${_SSH_FOLDER}" \
&& chmod go-rwx "${_SSH_FOLDER}" \
&& echo "SUCCESS: The ssh folder was created: ("$(readlink -f ${0})")" \
&& echo " - '${_SSH_FOLDER}'" \
&& return 0
#The root user can create every folder
! [ -d "${_SSH_FOLDER}" ] \
&& [ "${_USER:?"Missing USER"}" != "$(whoami)" ] \
&& [ "$(id -u)" == "0" ] \
&& mkdir -p "${_SSH_FOLDER}" \
&& chown "${_USER}:${_USER}" "${_SSH_FOLDER}" \
&& chmod go-rwx "${_SSH_FOLDER}" \
&& echo "SUCCESS: The ssh folder was created: ("$(readlink -f ${0})")" \
&& echo " - '${_SSH_FOLDER}'" \
&& return 0
echo "FAIL: The ssh folder could not be prepared: ("$(readlink -f ${0})")"
echo " - '${_SSH_FOLDER}'"
echo " - due to an error or insufficient rights."
return 1
}
function defineAuthorizedKeysOfUser() {
local _ROOT _CORE_SCRIPTS _DOMAIN _DEFINITIONS _USER
_DEFINITIONS="$(realpath -s "${1:?"Missing first parameter DEFINITIONS: 'ROOT/definitions/DOMAIN'"}")"
_ROOT="${_DEFINITIONS%%/definitions/*}/" #Removes longest matching pattern '/definitions/*' from the end
_DOMAIN="${_DEFINITIONS##*/definitions/}" #Removes longest matching pattern '*/definitions/' from the begin
_DOMAIN="${_DOMAIN%/}" #Removes shortest matching pattern '/' from the end
#Build from components for safety
_DEFINITIONS="${_ROOT:?"Missing ROOT"}definitions/${_DOMAIN:?"Missing DOMAIN"}"
_USER="${2:?"Missing second parameter USER"}"
_CORE_SCRIPTS="${_ROOT:?"Missing ROOT"}core/"
readonly _ROOT _CORE_SCRIPTS _DOMAIN _DEFINITIONS _USER
case "${_USER:?"Missing USER"}" in
root)
prepareFolder "/root/.ssh" \
&& echo \
&& source "${_CORE_SCRIPTS:?"Missing CORE_SCRIPTS"}ensureUsageOfDefinitions.sh" "${_DEFINITIONS}" "/root/.ssh/authorized_keys" \
&& return 0 || return 1
;;
*)
prepareFolder "/home/${_USER}/.ssh" \
&& echo \
&& source "${_CORE_SCRIPTS:?"Missing CORE_SCRIPTS"}ensureUsageOfDefinitions.sh" "${_DEFINITIONS}" "/home/${_USER}/.ssh/authorized_keys" \
&& return 0 || return 1
;;
esac
}
# sanitizes all parameters
defineAuthorizedKeysOfUser \
"$(echo ${1} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
"$(echo ${2} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
&& exit 0 || exit 1

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core/ensureUsageOfDefinitions.sh Executable file
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#!/bin/bash
#WARNING: Used for core functionality in setup.sh
# DO NOT rename the script and test changes well!
function printIfEqual() {
[ "${1:?"Missing first parameter"}" == "${2}" ] \
&& echo "${1}" \
&& return 0
return 1
}
function isCoreDefinition() {
echo "${1:?"Missing first parameter FILE"}" | grep "/root/.ssh/authorized_keys" &> /dev/null \
&& return 0
echo "${1:?"Missing first parameter FILE"}" | grep "/home/jenkins/.ssh/authorized_keys" &> /dev/null \
&& return 0
echo "${1:?"Missing first parameter FILE"}" | grep "/etc/sudoers.d/allow-jenkins-updateRepositories" &> /dev/null \
&& return 0
return 1
}
function printSelectedDefinition() {
local _CORE_FILE_DEFINED_ALL_HOSTS _CORE_FILE_DEFINED_THIS_HOST _FILE_DEFINED_ALL_HOSTS _FILE_DEFINED_THIS_HOST
_CORE_FILE_DEFINED_ALL_HOSTS="${1:?"Missing DEFINITIONS"}/core/all${2:?"Missing CURRENT_FULLFILE"}"
_CORE_FILE_DEFINED_THIS_HOST="${1:?"Missing DEFINITIONS"}/core/$(hostname -s)${2:?"Missing CURRENT_FULLFILE"}"
_FILE_DEFINED_ALL_HOSTS="${1:?"Missing DEFINITIONS"}/hosts/all${2:?"Missing CURRENT_FULLFILE"}"
_FILE_DEFINED_THIS_HOST="${1:?"Missing DEFINITIONS"}/hosts/$(hostname -s)${2:?"Missing CURRENT_FULLFILE"}"
readonly _CORE_FILE_DEFINED_ALL_HOSTS _CORE_FILE_DEFINED_THIS_HOST _FILE_DEFINED_ALL_HOSTS _FILE_DEFINED_THIS_HOST
#The following are special definitions that affect the core functionality.
#Try this host first because it should be priorized.
isCoreDefinition "${2:?"Missing CURRENT_FULLFILE"}" \
&& [ -s "${_CORE_FILE_DEFINED_THIS_HOST}" ] \
&& echo "${_CORE_FILE_DEFINED_THIS_HOST}" \
&& return 0
#The following are special definitions that affect the core functionality.
isCoreDefinition "${2:?"Missing CURRENT_FULLFILE"}" \
&& [ -s "${_CORE_FILE_DEFINED_ALL_HOSTS}" ] \
&& echo "${_CORE_FILE_DEFINED_ALL_HOSTS}" \
&& return 0
#Try this host first because it should be priorized.
! isCoreDefinition "${2:?"Missing CURRENT_FULLFILE"}" \
&& [ -s "${_FILE_DEFINED_THIS_HOST}" ] \
&& echo "${_FILE_DEFINED_THIS_HOST}" \
&& return 0
! isCoreDefinition "${2:?"Missing CURRENT_FULLFILE"}" \
&& [ -s "${_FILE_DEFINED_ALL_HOSTS}" ] \
&& echo "${_FILE_DEFINED_ALL_HOSTS}" \
&& return 0
return 1
}
function createSymlinkToDefinition() {
local _CURRENT_FOLDER _CURRENT_FULLFILE _DEFINED_FULLFILE _SAVED_FULLFILE
_CURRENT_FOLDER="${1:?"Missing CURRENT_FOLDER"}"
_CURRENT_FULLFILE="${2:?"Missing CURRENT_FULLFILE"}"
_DEFINED_FULLFILE="${3:?"Missing DEFINED_FULLFILE"}"
_SAVED_FULLFILE="${4:?"Missing SAVED_FULLFILE"}"
readonly _CURRENT_FOLDER _CURRENT_FULLFILE _DEFINED_FULLFILE _SAVED_FULLFILE
[ -f "${_CURRENT_FULLFILE}" ] \
&& [ "$(sha256sum "${_DEFINED_FULLFILE}" | cut -d' ' -f1)" == "$(sha256sum "${_CURRENT_FULLFILE}" | cut -d' ' -f1)" ] \
&& echo "The content of the current file already matches the definition, but it will be replaced by a symlink..."
[ -f "${_CURRENT_FULLFILE}" ] \
&& [ "$(sha256sum "${_DEFINED_FULLFILE}" | cut -d' ' -f1)" == "$(sha256sum "${_CURRENT_FULLFILE}" | cut -d' ' -f1)" ] \
&& echo "The content of the current file already matches the definition, but it will be replaced by a symlink..."
[ -f "${_CURRENT_FULLFILE}" ] \
&& mv "${_CURRENT_FULLFILE:?"Missing CURRENT_FULLFILE"}" "${_SAVED_FULLFILE:?"Missing SAVED_FULLFILE"}" \
&& echo "Current file has been backed up to: '${_SAVED_FULLFILE}'"
[ -d "${_CURRENT_FOLDER}" ] \
&& ln -s -f "${_DEFINED_FULLFILE}" "${_CURRENT_FULLFILE}" \
&& return 0
[ -f "${_SAVED_FULLFILE}" ] \
&& cp --remove-destination "${_SAVED_FULLFILE}" "${_CURRENT_FULLFILE}" \
&& echo "File restored due to a failure."
return 1
}
function ensureUsageOfDefinitions() {
local _ROOT _CURRENT_FILE _CURRENT_FOLDER _CURRENT_FULLFILE _DEFINITIONS _DOMAIN _DEFINED_FULLFILE _NOW _SAVED_FULLFILE
_DEFINITIONS="$(realpath -s "${1:?"Missing first parameter DEFINITIONS: 'ROOT/definitions/DOMAIN'"}")"
_ROOT="${_DEFINITIONS%%/definitions/*}/" #Removes longest matching pattern '/definitions/*' from the end
_DOMAIN="${_DEFINITIONS##*/definitions/}" #Removes longest matching pattern '*/definitions/' from the begin
_DOMAIN="${_DOMAIN%/}" #Removes shortest matching pattern '/' from the end
#Build from components for safety
_DEFINITIONS="$(printIfEqual "${_DEFINITIONS}" "${_ROOT:?"Missing ROOT"}definitions/${_DOMAIN:?"Missing DOMAIN"}")"
_CURRENT_FOLDER="$(dirname "${2:?"Missing second parameter CURRENT_FULLFILE"}")"
_CURRENT_FOLDER="${_CURRENT_FOLDER%/}/" #Removes shortest matching pattern '/' from the end
! [ -d "${_CURRENT_FOLDER}" ] \
&& echo "FAIL: The folder cannot be read: ("$(readlink -f ${0})")" \
&& echo " - '${_CURRENT_FOLDER}'" \
&& echo " - user '"$(whoami)"' has insufficient rights on this host '$(hostname -s)'" \
&& echo " - or the folder does not exist." \
&& return 1
_CURRENT_FOLDER="$(realpath -s "${_CURRENT_FOLDER:?"Missing CURRENT_FOLDER"}")"
_CURRENT_FOLDER="${_CURRENT_FOLDER%/}/" #Removes shortest matching pattern '/' from the end
_CURRENT_FILE="$(basename "${2:?"Missing second parameter CURRENT_FULLFILE"}")"
#Build from components for safety
_CURRENT_FULLFILE="${_CURRENT_FOLDER:?"Missing CURRENT_FOLDER"}${_CURRENT_FILE:?"Missing CURRENT_FILE"}"
_DEFINED_FULLFILE="$(printSelectedDefinition "${_DEFINITIONS}" "${_CURRENT_FULLFILE}")"
_NOW="$(date +%Y%m%d_%H%M)"
_SAVED_FULLFILE="${_CURRENT_FULLFILE}-backup@${_NOW:?"Missing NOW"}"
readonly _ROOT _CURRENT_FILE _CURRENT_FOLDER _CURRENT_FULLFILE _DEFINITIONS _DOMAIN _DEFINED_FULLFILE _NOW _SAVED_FULLFILE
! [ -f "${_DEFINED_FULLFILE}" ] \
&& echo "FAIL: No definition available for this file: ("$(readlink -f ${0})")" \
&& echo " - '${_CURRENT_FULLFILE}'" \
&& return 1
! [ -s "${_DEFINED_FULLFILE}" ] \
&& echo "FAIL: No content available for this file: ("$(readlink -f ${0})")" \
&& echo " - '${_CURRENT_FULLFILE}'" \
&& return 1
[ "${_DEFINED_FULLFILE}" == "$(readlink -f "${_CURRENT_FULLFILE}")" ] \
&& echo "SUCCESS: The definition already is in place: ("$(readlink -f ${0})")" \
&& echo " - '${_DEFINED_FULLFILE}'" \
&& return 0
echo "${_ROOT:?"Missing ROOT"}" | grep "home" &> /dev/null \
&& echo "SUCCESS: Although this definition will be skipped: ("$(readlink -f ${0})")" \
&& echo " - '${_DEFINED_FULLFILE}'" \
&& echo " that is because the current environment is:" \
&& echo " - ${_ROOT}" \
&& echo " following file is in use:" \
&& echo " - $(readlink -f "${_CURRENT_FULLFILE}")" \
&& return 0
! [ -w "${_CURRENT_FOLDER}" ] \
&& echo "FAIL: The current file cannot be added: ("$(readlink -f ${0})")" \
&& echo " - '${_CURRENT_FULLFILE}'" \
&& echo " - user '$(whoami)' has insufficient rights on this host '$(hostname -s)'" \
&& return 1
[ -f "${_CURRENT_FULLFILE}" ] \
&& ! [ -w "${_CURRENT_FULLFILE}" ] \
&& echo "FAIL: The current file cannot be modified: ("$(readlink -f ${0})")" \
&& echo " - '${_CURRENT_FULLFILE}'" \
&& echo " - user '$(whoami)' has insufficient rights on this host '$(hostname -s)'" \
&& return 1
createSymlinkToDefinition "${_CURRENT_FOLDER}" "${_CURRENT_FULLFILE}" "${_DEFINED_FULLFILE}" "${_SAVED_FULLFILE}" \
&& echo "SUCCESS: The definition was ensured: ("$(readlink -f ${0})")" \
&& echo "- '${_DEFINED_FULLFILE}'" \
&& return 0
echo "FAIL: The definition could not be ensured: ("$(readlink -f ${0})")"
echo " - due to an error or insufficient rights."
return 1
}
# sanitizes all parameters
ensureUsageOfDefinitions \
"$(echo ${1} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
"$(echo ${2} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
&& exit 0 || exit 1

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definitions/README.md Normal file
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This folder `definitions` contains one repository per domain to define stuff across all hosts of that domain.

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preparationBeforeCloning.sh Executable file
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#!/bin/bash
[ "$(id -u)" != "0" ] \
&& echo "This script prepares the user 'root' of this host and the host itself," \
&& echo "so this script is allowed to be executed if you are root only." \
&& exit 1
function setNeededHostnameOrExit() {
_FQDN="${1:?"Missing unique long hostname (fqdn, eg.: host1.example.net) for this host as first parameter."}"
echo "${_FQDN}" | grep '\.' &> /dev/null \
&& hostnamectl set-hostname "${_FQDN}" \
&& return 0
echo "FAILED: setting full qualified domain name, given value was:"
echo " - ${_FQDN}"
exit 1
}
function prepare() {
git --version > /dev/null || (apt update; apt upgrade -y; apt install git)
echo
echo "Public SSH-Key for root@$(hostname -b):"
# -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
cat "/root/.ssh/id_ed25519.pub" \
|| (ssh-keygen \
-t ed25519 \
-f "/root/.ssh/id_ed25519" -q -N "" \
-C "$(date +%Y%m%d)-root@$(hostname -b)" \
&& cat "/root/.ssh/id_ed25519.pub")
echo
echo "Now you have to register the public ssh-key from above into your git-server to grant these access rights:"
echo " - scripts repository (allow readonly access only),"
echo " - definitions repository (allow readonly access only),"
echo " - states repository (allow writable access)."
echo
echo "After all access rights are granted you can clone the Infrastructure System:"
echo " e.g.: git clone ssh://git@git.example.dev:22448/iss.git /iss"
echo
echo "Finally call 'setupCoreOntoThisHost.sh' from the root directory of the repository:"
echo " e.g.: /iss/setupCoreOntoThisHost.sh"
echo
}
# sanitizes all parameters
setNeededHostnameOrExit "$(echo ${1} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
&& prepare

4
renew.this.sh Executable file
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#!/bin/bash
echo "$(head -n 3 ${0})" > ${0}
echo "#$(date --rfc-3339=ns)" >> ${0}
#2023-11-11 15:03:46.439551015+01:00

220
setupCoreOntoThisHost.sh Executable file
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#!/bin/bash
[ "$(id -u)" != "0" ] \
&& sudo "${0}" "${1}" \
&& exit 0
function checkPathsAreAvaiable() {
grep --version &> /dev/null \
&& [ "$(echo ${PATH} | tr ':' '\n' | grep -c /usr/local/sbin)" -ge 1 ] \
&& [ "$(echo ${PATH} | tr ':' '\n' | grep -c /usr/local/bin)" -ge 1 ] \
&& [ "$(echo ${PATH} | tr ':' '\n' | grep -c /usr/sbin)" -ge 1 ] \
&& [ "$(echo ${PATH} | tr ':' '\n' | grep -c /usr/bin)" -ge 1 ] \
&& [ "$(echo ${PATH} | tr ':' '\n' | grep -c /sbin)" -ge 3 ] \
&& [ "$(echo ${PATH} | tr ':' '\n' | grep -c /bin)" -ge 3 ] \
&& return 0
echo "Content of variable PATH is not available."
return 1
}
function checkGitIsAvailable() {
git --version &> /dev/null \
&& return 0
apt update &> /dev/null
echo "Git seams to be unavailable. Please install it using 'apt install git'."
return 1
}
function checkPreconditions() {
local _ROOT _DOMAIN
_ROOT="${1:?"Missing parameter ROOT"}"
_DOMAIN="${2}" # Optional parameter DOMAIN
readonly _ROOT _DOMAIN
! [ -z "${_DOMAIN}" ] \
&& [ "$(hostname -d)" != "${_DOMAIN}" ] \
&& echo \
&& echo "WARNING: system-domain DOES NOT MATCH domainOfHostOwner: '$(hostname -d)' != '${_DOMAIN}'" \
&& echo
# Given domain verfügbar (nicht leer)
! [ -z "${_DOMAIN}" ] \
&& checkPathsAreAvaiable \
&& checkGitIsAvailable \
&& git -C "${_ROOT}" pull &> /dev/null \
&& return 0
echo
echo "The preconditions were not met."
# Given domain verfügbar (nicht leer) => Text unten unnötig
! [ -z "${_DOMAIN}" ] \
&& return 1
echo
echo "The needed domain provided by the owner of this host is not available."
echo "You have to configure the host correctly, e.g.:"
echo " hostnamectl set-hostname 'SHORT_HOSTNAME.DOMAIN.TLD'"
echo
echo "If you are root you can specify the domain information as a parameter, e.g.:"
echo " ${0} DOMAIN.TLD"
echo "Then the specified domain is appended to the current short hostname: '$(hostname -s)'"
return 1
}
function getOrSetDomain() {
local _ROOT _DOMAIN_FILE _GIVEN_DOMAIN
_ROOT="${1:?"Missing parameter ROOT"}"
_DOMAIN_FILE="${_ROOT:?"Missing ROOT"}domainOfHostOwner"
_GIVEN_DOMAIN="${2}" # Optional parameter DOMAIN
readonly _ROOT _DOMAIN_FILE _GIVEN_DOMAIN
# Wenn DOMAIN_FILE enhält lesbare Daten
grep '[^[:space:]]' "${_DOMAIN_FILE:?"Missing DOMAIN_FILE"}" &> /dev/null \
&& cat "${_DOMAIN_FILE}" \
&& return 0
# Der boot-hostname muss mindestens einen Punkt enthalten, dann wird die hintere Hälfte als Domain genommen
hostname -b | grep "\." | cut -d. -f2- > "${_DOMAIN_FILE}"
grep '[^[:space:]]' "${_DOMAIN_FILE}" &> /dev/null \
&& cat "${_DOMAIN_FILE}" \
&& return 0
# Given domain is set (nicht leer)
! [ -z "${_GIVEN_DOMAIN}" ] \
&& [ "$(id -u)" == "0" ] \
&& hostnamectl set-hostname "$(hostname -s).${_GIVEN_DOMAIN}" \
&& hostname -b | grep "\." | cut -d. -f2- > "${_DOMAIN_FILE}" \
&& grep '[^[:space:]]' "${_DOMAIN_FILE}" &> /dev/null \
&& cat "${_DOMAIN_FILE}" \
&& return 0
return 1
}
function getRemoteRepositoryPath() {
local _ROOT
_ROOT="${1:?"Missing parameter ROOT"}"
readonly _ROOT
_RESULT="$(git -C "${_ROOT:?"Missing ROOT"}" remote show origin | grep -i 'fetch' | xargs -n 1 | grep -i 'ssh://')"
_RESULT="${_RESULT%/*}" #Removes shortest matching pattern '/*' from the end
! [ -z "${_RESULT}" ] \
&& echo "${_RESULT}" \
&& return 0
return 1
}
function addDefinition(){
local _ROOT _CORE_SCRIPTS _DEFINITIONS _REPOSITORY
_DEFINITIONS="${1:?"Missing parameter DEFINITIONS"}"
_REPOSITORY="${2:?"Missing parameter REPOSITORY"}"
_ROOT="${_DEFINITIONS%%/definitions/*}/" #Removes longest matching pattern '/definitions/*' from the end
_CORE_SCRIPTS="${_ROOT:?"Missing ROOT"}core/"
readonly _ROOT _CORE_SCRIPTS _DEFINITIONS _REPOSITORY
[ "$(id -u)" == "0" ] \
&& "${_CORE_SCRIPTS:?"Missing CORE_SCRIPTS"}addAndCheckGitRepository.sh" "${_DEFINITIONS}" "${_REPOSITORY}" readonly \
&& echo " - definitions are usable for this host." \
&& return 0
[ "$(id -u)" != "0" ] \
&& "${_CORE_SCRIPTS:?"Missing CORE_SCRIPTS"}addAndCheckGitRepository.sh" "${_DEFINITIONS}" "${_REPOSITORY}" writable \
&& echo " - definitions are usable, as working copy." \
&& return 0
return 1
}
function addState() {
local _ROOT _CORE_SCRIPTS _STATES _REPOSITORY
_STATES="${1:?"Missing parameter STATES"}"
_REPOSITORY="${2:?"Missing parameter REPOSITORY"}"
_ROOT="${_STATES%%/states/*}/" #Removes longest matching pattern '/states/*' from the end
_CORE_SCRIPTS="${_ROOT:?"Missing ROOT"}core/"
readonly _ROOT _CORE_SCRIPTS _STATES _REPOSITORY
[ "$(id -u)" == "0" ] \
&& "${_CORE_SCRIPTS:?"Missing CORE_SCRIPTS"}addAndCheckGitRepository.sh" "${_STATES}" "${_REPOSITORY}" writable \
&& echo " - states are usable for this host." \
&& return 0
[ "$(id -u)" != "0" ] \
&& "${_CORE_SCRIPTS:?"Missing CORE_SCRIPTS"}addAndCheckGitRepository.sh" "${_STATES}" "${_REPOSITORY}" writable \
&& echo " - states are usable, as working copy." \
&& return 0
return 1
}
function setupCoreFunctionality() {
local _ROOT _CORE_SCRIPTS _DEFINITIONS _MINUTE_FROM_OWN_IP _SETUP
_DEFINITIONS="${1:?"Missing DEFINITIONS: 'ROOT/definitions/DOMAIN'"}"
_ROOT="${_DEFINITIONS%%/definitions/*}/" #Removes longest matching pattern '/definitions/*' from the end
_CORE_SCRIPTS="${_ROOT:?"Missing ROOT"}core/"
_MINUTE_FROM_OWN_IP="$(hostname -I | xargs -n 1 | grep -F . | head -n 1 | cut -d. -f4 || echo 0)" #uses last value from first own ipv4 or 0 as minute value
_SETUP="${2:?"Missing SETUP"}"
readonly _ROOT _CORE_SCRIPTS _DEFINITIONS _MINUTE_FROM_OWN_IP _SETUP
[ "$(id -u)" != "0" ] \
&& echo "Configuration of host skipped because of insufficient rights." \
&& return 1
[ "$(id -u)" == "0" ] \
&& echo \
&& "${_CORE_SCRIPTS:?"Missing CORE_SCRIPTS"}defineAuthorizedKeysOfUser.sh" "${_DEFINITIONS}" root \
&& echo \
&& "${_CORE_SCRIPTS:?"Missing CORE_SCRIPTS"}addNormalUser.sh" jenkins \
&& echo \
&& "${_CORE_SCRIPTS:?"Missing CORE_SCRIPTS"}defineAuthorizedKeysOfUser.sh" "${_DEFINITIONS}" jenkins \
&& echo \
&& "${_CORE_SCRIPTS:?"Missing CORE_SCRIPTS"}ensureUsageOfDefinitions.sh" "${_DEFINITIONS}" /etc/sudoers.d/allow-jenkins-updateRepositories \
&& echo \
&& "${_CORE_SCRIPTS:?"Missing CORE_SCRIPTS"}addToCrontabEveryHour.sh" "${_SETUP}" "${_MINUTE_FROM_OWN_IP}" \
&& return 0
return 1
}
function setup() {
local _ROOT _DEFINITIONS _DEFINITIONS_REPOSITORY _DOMAIN _REPOSITORY_PATH _SETUP _STATES _STATES_REPOSITORY
_SETUP="$(readlink -f "${0}" 2> /dev/null)"
_ROOT="$(dirname ${_SETUP:?"Missing SETUP"} 2> /dev/null || echo "/iss")/"
_DOMAIN="$(getOrSetDomain "${_ROOT:?"Missing ROOT"}" "${1}")"
_REPOSITORY_PATH="$(getRemoteRepositoryPath "${_ROOT:?"Missing ROOT"}")"
! checkPreconditions "${_ROOT:?"Missing ROOT"}" "${_DOMAIN}" \
&& return 1
_DEFINITIONS="${_ROOT:?"Missing ROOT"}definitions/${_DOMAIN:?"Missing DOMAIN"}"
_DEFINITIONS_REPOSITORY="${_REPOSITORY_PATH:?"Missing REPOSITORY_PATH"}/iss-definition-${_DOMAIN:?"Missing DOMAIN"}.git"
_STATES="${_ROOT:?"Missing ROOT"}states/${_DOMAIN:?"Missing DOMAIN"}"
_STATES_REPOSITORY="${_REPOSITORY_PATH:?"Missing REPOSITORY_PATH"}/iss-state-${_DOMAIN:?"Missing DOMAIN"}.git"
readonly _ROOT _DEFINITIONS _DEFINITIONS_REPOSITORY _DOMAIN _REPOSITORY_PATH _SETUP _STATES _STATES_REPOSITORY
echo \
&& echo "Running setup using repositories of: '${_REPOSITORY_PATH:?"Missing REPOSITORY_PATH"}' ..." \
&& echo \
&& addDefinition "${_DEFINITIONS:?"Missing DEFINITIONS"}" "${_DEFINITIONS_REPOSITORY:?"Missing DEFINITIONS_REPOSITORY"}" \
&& echo \
&& addState "${_STATES:?"Missing STATES"}" "${_STATES_REPOSITORY:?"Missing STATES_REPOSITORY"}" \
&& echo \
&& echo "Using definitions: '${_DEFINITIONS:?"Missing DEFINITIONS"}' ..." \
&& setupCoreFunctionality "${_DEFINITIONS:?"Missing DEFINITIONS"}" "${_SETUP:?"Missing SETUP"}" \
&& return 0
echo "FAIL: setup is incomplete: ("$(readlink -f ${0})")"
echo " - due to an error or insufficient rights."
return 1
}
# sanitizes all parameters
setup \
"$(echo ${1} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
&& exit 0 || exit 1

1
states/README.md Normal file
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This folder `states` contains one repository per domain to document stuff about all hosts of that domain by the system only.

73
updateRepositories.sh Executable file
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#!/bin/bash
# No write permission, but terminal => restart as root using sudo, user jenkins can do this with>
! [ -w "${0}" ] \
&& [ -t 0 ] \
&& sudo "${0}" "${1}" \
&& exit 0
# No write permission and no terminal => restart as root using sudo non-interactive, user jenkin>
! [ -w "${0}" ] \
&& ! [ -t 0 ] \
&& sudo -n "${0}" "${1}" \
&& exit 0
# Still no write permission => was not called as root
! [ -w "${0}" ] \
&& echo "Host $HOSTNAME: insufficient rights." \
&& exit 1
function update_repositories() {
local _ROOT _DEFINITIONS _DOMAIN _MODE _STATES _UPDATE_REPOSITORIES
_UPDATE_REPOSITORIES="$(readlink -f "${0}" 2> /dev/null)"
_MODE="${1:-"all"}"
_ROOT="$(dirname ${_UPDATE_REPOSITORIES:?"Missing UPDATE_REPOSITORIES"} 2> /dev/null || echo>
_DOMAIN="$(cat ${_ROOT:?"Missing ROOT"}domainOfHostOwner)"
_DEFINITIONS="${_ROOT}definitions/${_DOMAIN:?"Missing DOMAIN from file: ${_ROOT}domainOfHost>
_STATES="${_ROOT}states/${_DOMAIN:?"Missing DOMAIN from file: ${_ROOT}domainOfHostOwner"}/"
readonly _ROOT _DEFINITIONS _DOMAIN _MODE _STATES _UPDATE_REPOSITORIES
[ "${_MODE}" == "--repair" ] \
&& (git -C "${_ROOT}" reset --hard origin/master; \
git -C "${_DEFINITIONS}" reset --hard origin/master; \
git -C "${_STATES}" reset --hard origin/master; \
echo "Run repairs") \
&& return 0
[ "${_MODE}" == "--test" ] \
&& git -C "${_ROOT}" pull \
&& git -C "${_DEFINITIONS}" pull \
&& git -C "${_STATES}" pull \
&& echo "Run in testMode successfully." \
&& return 0
[ "${_MODE}" == "--scripts" ] \
&& echo "Host $HOSTNAME updating scripts: ${_ROOT} ..." \
&& (git -C "${_ROOT}" pull &> /dev/null &) \
&& return 0
[ "${_MODE}" == "--definitions" ] \
&& echo "Host ${HOSTNAME} updating definitions: ${_DEFINITIONS} ..." \
&& (git -C "${_DEFINITIONS}" pull &> /dev/null &) \
&& return 0
[ "${_MODE}" == "--states" ] \
&& echo "Host ${HOSTNAME} updating states: ${_STATES} ..." \
&& (git -C "${_STATES}" pull &> /dev/null &) \
&& return 0
echo "Host ${HOSTNAME} updating ${_MODE}:" \
&& echo " - ${_ROOT}" \
&& echo " - ${_DEFINITIONS}" \
&& echo " - ${_STATES}"
git -C "${_ROOT}" pull &> /dev/null
git -C "${_DEFINITIONS}" pull &> /dev/null
git -C "${_STATES}" pull &> /dev/null
}
# sanitizes all parameters
update_repositories \
"$(echo ${1} | sed -E 's|[^a-zA-Z0-9/:@._-]*||g')" \
&& exit 0 || exit 1