81 lines
2.4 KiB
Bash
Executable File
81 lines
2.4 KiB
Bash
Executable File
#!/bin/sh
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set -eu
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usage() {
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echo "usage: $0 --project-name NAME --output FILE" >&2
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exit 2
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}
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project_name=
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output=
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while [ "$#" -gt 0 ]; do
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case "$1" in
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--project-name) project_name=${2-}; shift 2 ;;
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--output) output=${2-}; shift 2 ;;
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*) usage ;;
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esac
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done
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[ -n "$project_name" ] && [ -n "$output" ] || usage
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[ ! -e "$output" ] || { echo "refusing to overwrite existing backup: $output" >&2; exit 2; }
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output_dir=$(dirname "$output")
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output_name=$(basename "$output")
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[ -d "$output_dir" ] || { echo "backup destination directory does not exist" >&2; exit 2; }
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resolve_volume() {
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names=$(docker volume ls \
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--filter "label=com.docker.compose.project=$project_name" \
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--filter "label=com.docker.compose.volume=qdrant-data" \
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--format '{{.Name}}')
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count=$(printf '%s\n' "$names" | sed '/^$/d' | wc -l | tr -d ' ')
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[ "$count" -eq 1 ] || {
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echo "expected exactly one qdrant-data volume for compose project $project_name" >&2
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exit 2
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}
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printf '%s\n' "$names" | sed -n '/./{p;q;}'
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}
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resolve_mountpoint() {
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mountpoint=$(docker volume inspect --format '{{ .Mountpoint }}' "$1")
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[ -n "$mountpoint" ] || { echo "docker did not return a qdrant-data mountpoint" >&2; exit 2; }
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case "$mountpoint" in
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/*) ;;
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*) echo "qdrant-data mountpoint is not absolute: $mountpoint" >&2; exit 2 ;;
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esac
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[ -d "$mountpoint" ] || { echo "qdrant-data mountpoint is not a directory: $mountpoint" >&2; exit 2; }
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printf '%s\n' "$mountpoint"
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}
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volume_name=$(resolve_volume)
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mountpoint=$(resolve_mountpoint "$volume_name")
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running_container=$(docker compose --project-name "$project_name" ps --status running -q qdrant)
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restart_qdrant=0
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cleanup() {
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status=$?
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if [ "${temporary_output:-}" ] && [ -e "${temporary_output:-}" ]; then
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rm -f "$temporary_output"
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fi
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if [ "$restart_qdrant" -eq 1 ]; then
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docker compose --project-name "$project_name" start qdrant >/dev/null
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fi
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exit "$status"
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}
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trap cleanup EXIT HUP INT TERM
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if [ -n "$running_container" ]; then
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docker compose --project-name "$project_name" stop qdrant >/dev/null
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restart_qdrant=1
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fi
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umask 077
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temporary_output=$(mktemp "$output_dir/.${output_name}.tmp.XXXXXX")
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tar -C "$mountpoint" -cf "$temporary_output" .
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if ! ln "$temporary_output" "$output"; then
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echo "refusing to replace backup destination created concurrently: $output" >&2
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exit 2
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fi
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rm -f "$temporary_output"
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temporary_output=
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echo "Qdrant backup written from $volume_name to $output"
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