102 lines
4.0 KiB
Bash
102 lines
4.0 KiB
Bash
#!/usr/bin/env bash
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### Bash Environment Setup
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# http://redsymbol.net/articles/unofficial-qbash-strict-mode/
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# https://www.gnu.org/software/bash/manual/html_node/The-Set-Builtin.html
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# set -o xtrace
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set -o errexit
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set -o errtrace
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set -o nounset
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set -o pipefail
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IFS=$'\n'
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# Fully backup a docker-compose project, including all images, named and unnamed volumes, container filesystems, config, logs, and databases.
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project_dir="${1:-$PWD}"
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if [ -f "$project_dir/docker-compose.yml" ]; then
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echo "[i] Found docker-compose config at $project_dir/docker-compose.yml"
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else
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echo "[X] Could not find a docker-compose.yml file in $project_dir"
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exit 1
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fi
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project_name=$(basename "$project_dir")
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backup_time=$(date +"%Y-%m-%d_%H-%M")
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backup_dir="$project_dir/data/backups/$backup_time"
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# Source any needed environment variables
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[ -f "$project_dir/docker-compose.env" ] && source "$project_dir/docker-compose.env"
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[ -f "$project_dir/.env" ] && source "$project_dir/.env"
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echo "[+] Backing up $project_name project to $backup_dir"
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mkdir -p "$backup_dir"
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echo " - Saving docker-compose.yml config"
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cp "$project_dir/docker-compose.yml" "$backup_dir/docker-compose.yml"
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# Optional: run a command inside the container to dump your application's state/database to a stable file
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echo " - Saving application state to ./dumps"
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mkdir -p "$backup_dir/dumps"
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docker-compose exec db /usr/bin/mysqldump -u gitea --password=fSYot2RrzN4y5Gtj --no-tablespaces gitea | gzip -9 > "$backup_dir/dumps/$MYSQL_DATABASE.sql.gz"
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# your database/stateful service export commands to run inside docker go here, e.g.
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# docker-compose exec postgres env PGPASSWORD="$POSTGRES_PASSWORD" pg_dump -U "$POSTGRES_USER" "$POSTGRES_DB" | gzip -9 > "$backup_dir/dumps/$POSTGRES_DB.sql.gz"
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# docker-compose exec redis redis-cli SAVE
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# docker-compose exec redis cat /data/dump.rdb | gzip -9 > "$backup_dir/dumps/redis.rdb.gz"
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# Optional: pause the containers before backing up to ensure consistency
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# docker-compose pause
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for service_name in $(docker-compose config --services); do
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image_id=$(docker-compose images -q "$service_name")
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image_name=$(docker image inspect --format '{{json .RepoTags}}' "$image_id" | jq -r '.[0]')
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container_id=$(docker-compose ps -q "$service_name")
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service_dir="$backup_dir/$service_name"
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echo "[*] Backing up ${project_name}__${service_name} to ./$service_name..."
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mkdir -p "$service_dir"
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# save image
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echo " - Saving $image_name image to ./$service_name/image.tar"
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docker save --output "$service_dir/image.tar" "$image_id"
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if [[ -z "$container_id" ]]; then
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echo " - Warning: $service_name has no container yet."
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echo " (has it been started at least once?)"
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continue
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fi
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# save config
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echo " - Saving container config to ./$service_name/config.json"
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docker inspect "$container_id" > "$service_dir/config.json"
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# save logs
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echo " - Saving stdout/stderr logs to ./$service_name/docker.{out,err}"
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docker logs "$container_id" > "$service_dir/docker.out" 2> "$service_dir/docker.err"
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# save data volumes
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mkdir -p "$service_dir/volumes"
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for source in $(docker inspect -f '{{range .Mounts}}{{println .Source}}{{end}}' "$container_id"); do
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volume_dir="$service_dir/volumes$source"
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echo " - Saving $source volume to ./$service_name/volumes$source"
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mkdir -p $(dirname "$volume_dir")
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cp -a -r "$source" "$volume_dir"
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done
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# save container filesystem
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echo " - Saving container filesystem to ./$service_name/container.tar"
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docker export --output "$service_dir/container.tar" "$container_id"
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# save entire container root dir
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echo " - Saving container root to $service_dir/root"
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cp -a -r "/var/lib/docker/containers/$container_id" "$service_dir/root"
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done
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echo "[*] Compressing backup folder to $backup_dir.tar.gz"
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tar -zcf "$backup_dir.tar.gz" --totals "$backup_dir" && rm -Rf "$backup_dir"
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echo "[√] Finished Backing up $project_name to $backup_dir.tar.gz."
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# Resume the containers if paused above
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# docker-compose unpause
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