Handling of overwritten domain improved incl. monitoring and its documentation.

script/monitor/generic/OVERRIDDEN_DOMAIN_CHECK.sh

@@ -0,0 +1,46 @@
+#!/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}" &> /dev/null \
+        && echo "master checked" \
+        && 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