added script

docker-backup.sh

@@ -0,0 +1,123 @@
+#!/bin/bash
+
+OPTIND=1
+
+VOLUMES=''
+ALLFLAG=''
+OUTDIR='./'
+NOAUTORESTART=''
+
+# get arguments
+while getopts "h?v:o:na" opt; do
+    case "$opt" in
+        h|\?)
+            echo "
+    docker-backup.sh stops all running containers, exports them and gzips them to the
+    current directory, then restarts the previously running containers in the reverse
+    order of which they were stopped.
+
+    This script assumes it is being run as root, or the current user is in the docker group.
+
+    Usage: "$0 "[args]
+
+    -a    Backup all containers, not just running containers. Only running containers will be
+          restarted after backup (unless otherwise specified by -n)
+
+    -h    Print this help message.
+
+    -n    Don't restart containers after backup
+
+    -o OUTDIR    Backups are sent to OUTDIR, rather than the current directory
+
+    -v VOLUME (-v SECONDVOLUME -v THIRDVOLUME...)]
+            Include volume directories with your backup. These are made once the container is
+            stopped to avoid corruption.
+"
+            exit 0
+            ;;
+        v)  VOLUMES=$VOLUMES\;$OPTARG
+            ;;
+        o) OUTDIR=$OPTARG
+            ;;
+        n) NOAUTORESTART='1'
+            ;;
+        a) ALLFLAG='-a'
+    esac
+done
+
+# Cleanup from getopts
+shift $((OPTIND-1))
+[ "$1" = "--" ] && shift
+
+
+# Check if outdir exists, else (try to) create it
+if [ ! -d $OUTDIR ]
+then
+    mkdir $OUTDIR
+fi
+
+# Check or write access
+if [ ! -w $OUTDIR ]
+then
+    echo $OUTDIR is not writable. Exiting...
+    exit 1
+fi
+
+# Remove first semicolon from volumes list
+VOLUMES=$(echo $VOLUMES | sed 's/^.//')
+
+# Get requested list of containers
+CONTAINERS=$(docker ps $ALLFLAG --format '{{.Names}}' | sed ':a;N;$!ba;s/\n/ /g')
+
+RUNNINGCONTAINERS=''
+if [ ! $NOAUTORESTART ]
+then
+    RUNNINGCONTAINERS=$(docker ps --format '{{.Names}}' | sed ':a;N;$!ba;s/\n/ /g' | awk '{for(i=NF;i>0;--i)printf "%s%s",$i,(i>1?OFS:ORS)}')
+fi
+
+# Stop all containers
+echo Stopping containers...
+for i in $CONTAINERS
+do
+    docker stop $i
+done
+
+# Wait for all to be stopped
+wait
+
+# Export each container
+echo Exporting containers...
+for i in $CONTAINERS
+do
+    docker export $i | gzip -c > $OUTDIR/$i-$(date +%Y%m%d-%H%M%S).tar.gz && echo "Exported "$i &
+done
+
+wait
+
+# Get specified volumes delimited by semicolons
+if [ $VOLUMES ]
+then
+    echo Backing up volumes...
+    OLDIFS=$IFS
+    IFS=';'
+
+    for i in $VOLUMES
+    do
+        tar czf $OUTDIR/$(basename $i).tar.gz $i && echo "Backed up "$i &
+    done
+
+    IFS=$OLDIFS
+fi
+
+# Restart previously running containers (if any were given or it was requested)
+if [ ! $NOAUTORESTART ]
+then
+    echo Restarting previously running containers...
+        for i in $RUNNINGCONTAINERS
+        do
+        docker start $i &
+    done
+
+    wait
+
+fi