mirror of
https://github.com/napnap75/multiarch-docker-images.git
synced 2026-02-05 10:28:59 +01:00
110 lines
4.6 KiB
Bash
Executable File
110 lines
4.6 KiB
Bash
Executable File
#!/bin/bash
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# Backup one directory
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function backup_dir {
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# Check if the dir to backup is mounted as a subdirectory of /root inside this container
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if [ -d "/root_fs$1" ]; then
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restic backup /root_fs$1
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return $?
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else
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echo "[ERROR] Directory $1 not found. Have you mounted the root fs from your host with the following option : '-v /:/root_fs:ro' ?"
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return -1
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fi
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}
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# Backup one file
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function backup_file {
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cat $1 | restic backup --stdin --stdin-filename $2
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return $?
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}
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# Firt, check the repository is unlocked and try to unlock it
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if [ "$(restic --no-lock list locks -q)" != "" ]; then
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echo "[INFO] Repository locked, trying to unlock"
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restic unlock
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if [ $? -ne 0 ]; then
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echo "[ERROR] Could not unlock repository"
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return -1
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fi
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fi
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count_success=0
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count_failure=0
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# List all the containers
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containers=$(curl -s --unix-socket /var/run/docker.sock http:/v1.26/containers/json)
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for container_id in $(echo $containers | jq ".[].Id") ; do
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container=$(echo $containers | jq -c ".[] | select(.Id==$container_id)")
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# Get the name and namespace (in case of a container run in a swarm stack)
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container_name=$(echo $container | jq -r ".Names | .[0]" | cut -d'.' -f1 | cut -d'/' -f2)
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namespace=$(echo $container | jq -r ".Labels | .[\"com.docker.stack.namespace\"]")
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# Backup the dirs labelled with "napnap75.backup.dirs"
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if $(echo $container | jq ".Labels | has(\"napnap75.backup.dirs\")") ; then
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for dir_name in $(echo $container | jq -r ".Labels | .[\"napnap75.backup.dirs\"]") ; do
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echo "[INFO] Backing up dir" $dir_name "for container" $container_name
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backup_dir $dir_name
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if [ $? -ne 0 ]; then
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((++count_failure))
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else
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((++count_success))
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fi
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done
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fi
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# Backup the volumes labelled with "napnap75.backup.volumes"
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if $(echo $container | jq ".Labels | has(\"napnap75.backup.volumes\")") ; then
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for volume_name in $(echo $container | jq -r ".Labels | .[\"napnap75.backup.volumes\"]") ; do
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if [ $namespace != "null" ] ; then volume_name="${namespace}_${volume_name}" ; fi
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volume_mount=$(echo $container | jq -r ".Mounts[] | select(.Name==\"$volume_name\") | .Source")
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echo "[INFO] Backing up volume" $volume_name "with mount" $volume_mount "for container" $container_name
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backup_dir $volume_mount
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if [ $? -ne 0 ]; then
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((++count_failure))
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else
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((++count_success))
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fi
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done
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fi
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# Backup the databases labelled with "napnap75.backup.databases"
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if $(echo $container | jq ".Labels | has(\"napnap75.backup.databases\")") ; then
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container_id=$(echo $container_id | sed "s/\"//g")
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database_password=$(curl -s --unix-socket /var/run/docker.sock http:/v1.26/containers/$container_id/json | jq -r ".Config.Env[] | match(\"MYSQL_ROOT_PASSWORD=(.*)\") | .captures[0].string")
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for database_name in $(echo $container | jq -r ".Labels | .[\"napnap75.backup.databases\"]") ; do
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echo "[INFO] Backing up database" $database_name "for container" $container_name
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if [[ "$database_password" != "" ]] ; then
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exec_id=$(curl -s --unix-socket /var/run/docker.sock -X POST -H "Content-Type: application/json" -d '{"AttachStdout":true,"AttachStderr":true,"Tty":true,"Cmd":["/bin/bash", "-c", "mysqldump -p'$database_password' --databases '$database_name'"]}' http:/v1.26/containers/$container_id/exec | jq ".Id" | sed "s/\"//g")
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else
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exec_id=$(curl -s --unix-socket /var/run/docker.sock -X POST -H "Content-Type: application/json" -d '{"AttachStdout":true,"AttachStderr":true,"Tty":true,"Cmd":["/bin/bash", "-c", "mysqldump --databases '$database_name'"]}' http:/v1.26/containers/$container_id/exec | jq ".Id" | sed "s/\"//g")
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fi
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curl -s --unix-socket /var/run/docker.sock -X POST -H "Content-Type: application/json" -d '{"Detach":false,"Tty":false}' http:/v1.26/exec/$exec_id/start | gzip > /tmp/database_backup.gz
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exit_code=$(curl -s --unix-socket /var/run/docker.sock http:/v1.26/exec/$exec_id/json | jq ".ExitCode")
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if [ $exit_code -ne 0 ]; then
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echo "[ERROR] Unable to backup database $database_name from container $container_name"
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cat /tmp/database_backup.gz | gzip -d
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((++count_failure))
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else
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backup_file /tmp/database_backup.gz ${container_name}—${database_name}.sql.gz
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if [ $? -ne 0 ]; then
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((++count_failure))
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else
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((++count_success))
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fi
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fi
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rm /tmp/database_backup.gz
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done
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fi
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done
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# Send a notification to Slack
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if [[ "$SLACK_URL" != "" ]] ; then
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curl -s -X POST --data-urlencode "payload={\"username\": \"rpi-docker-backup\", \"icon_emoji\": \":dvd:\", \"text\": \"Backup finished on host $HOSTNAME : $count_success succeeded, $count_failure failed\"}" $SLACK_URL
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fi
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# Return a non zero exit code if an error happened
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if [ $count_failure -ne 0 ]; then
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exit -1
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fi
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