docker.sh - Stops all or selected containers to save the persistent data intact. The containers are started in reverse order

files/docker.sh

@@ -0,0 +1,88 @@
+#!/usr/bin/env bash
+
+# Purpose: Get and save state of docker containers and stop them for a backup
+# Author: Frank Dornheim <dornheim@posteo.de> under GPLv2+
+# Category: Core
+# Override: False
+
+FILENAME=/tmp/borgbackup_docker.state
+DOCKERGROUP=docker
+
+#
+# Checks the state of a Docker container and saves it. 
+# Running containers are stopped to maintain a consistent backup.
+# After the backup finished, in a second step, all containers are restarted.
+#
+
+# Check for permissions to work with docker
+if [[ $(id -u) -ne 0 ]] || [[ $(groups) =~ '$DOCKERGROUP' ]]; then
+  echo "Please run as root or member of group docker"
+  exit 1
+fi
+
+function rwo(){ tr ' ' '\n'<<<"$@"|tac|tr '\n' ' ';} # reverse name order
+
+case "$1" in
+  start)
+    if [[ ! -f "$FILENAME" ]]; then
+      echo "$FILENAME didnt loger exist so cat restart container."
+      exit 1
+    fi
+
+    container_list=$(cat "$FILENAME")
+
+    echo "Containers were stopped in the following order: $container_list"
+    container_start_list=$(rwo $container_list)
+    echo "Reversed start order: $container_start_list"
+
+    for i in $container_start_list; do
+      echo "Start container: $i"
+      docker start $i &>/dev/null
+    done
+
+    #clean up
+    rm $FILENAME
+    ;;
+
+  stop)
+    # delete old state file
+    if [[ -f "$FILENAME" ]]; then
+      rm "$FILENAME"
+    fi
+    
+    # Named container or all container
+    if [[ $# -gt 1 ]]; then
+      container_list="${@:2:$#}" # Slice Arguments the first is {start|stop} the other are container names
+    else
+      # No container names passed, this means all containers are analyzed
+      container_list=$( docker inspect --format={{.Name}} $( docker ps -aq --no-trunc ) | cut -c2- )
+    fi
+
+    # save state and shutdown active container
+    for i in $container_list; do
+      state=$( docker ps -a -f name=$i | grep $i 2> /dev/null | awk '{ print $7 }')
+      if [[ $state -eq Up ]]; then
+        echo "Stop container: $i"
+        docker stop $i &>/dev/null
+      else
+        echo "The State of container: $i is not up, so ignoring them."
+      fi
+    done
+    echo "Containers were stopped in the following order: $( echo $container_list | tr '\n' ' ')"
+    echo $container_list > $FILENAME
+    ;;
+
+  --help)
+    echo "$0 {start|stop} <CONTAINERNAME> <CONTAINERNAME 2>"
+    echo ""
+    echo "stop:  Save the status of all running container an stop them due backup."
+    echo "start: Load status of container before the backup and start them."
+    echo "<CONTAINERNAME>: start|stop of a named container"
+    echo ""
+    ;;
+
+  *)
+    echo "Usage: $0. The first argument have to be:{start|stop}. See --help." >&2
+    exit 1
+    ;;
+esac