33 lines
1.4 KiB
Bash
Executable File
33 lines
1.4 KiB
Bash
Executable File
#!/bin/bash
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# Postgres backup/restore hook for the `postgres` service. Invoked by backupbot-two via:
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# backupbot.backup.pre-hook = "/pg_backup.sh backup"
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# backupbot.backup.volumes.postgres_data.path = "backup.sql"
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# backupbot.restore.post-hook = "/pg_backup.sh restore"
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# Backup dumps the DB to backup.sql (gzip) inside the postgres volume; backupbot archives it.
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# Restore reimports it. The mattermost app keeps TCP connections open to the DB, so restore must
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# terminate them and FORCE-drop before recreating, then reimport the dump deterministically — the
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# previous recipe shipped no restore hook (file-level PGDATA restore did not reload into the running
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# postgres), so a restored backup silently kept the live (un-restored) state.
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set -e
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BACKUP_FILE='/var/lib/postgresql/data/backup.sql'
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export PGPASSWORD=$(cat "${POSTGRES_PASSWORD_FILE:-/run/secrets/postgres_password}")
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DB_USER="${POSTGRES_USER:-mattermost}"
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DB_NAME="${POSTGRES_DB:-mattermost}"
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function backup {
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pg_dump -U "$DB_USER" "$DB_NAME" | gzip > "$BACKUP_FILE"
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}
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function restore {
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psql -U "$DB_USER" -d postgres -c \
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"SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE datname='${DB_NAME}' AND pid<>pg_backend_pid();"
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psql -U "$DB_USER" -d postgres -c "DROP DATABASE ${DB_NAME} WITH (FORCE);"
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createdb -U "$DB_USER" "$DB_NAME"
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gunzip -c "$BACKUP_FILE" | psql -U "$DB_USER" -d "$DB_NAME" -1 -v ON_ERROR_STOP=1 -f -
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}
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$@
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