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49 lines
1.7 KiB
49 lines
1.7 KiB
#!/bin/bash
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## When writing relation script, remember:
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## - they should be idempotents
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## - they can be launched while the dockers is already up
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## - they are launched from the host
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## - the target of the link is launched first, and get a chance to ``relation-set``
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## - both side of the scripts get to use ``relation-get``.
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set -e
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## XXXvlab: should use container name here so that it could support
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## multiple postgres
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label=pg-backup-$SERVICE_NAME
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DST=$CONFIGSTORE/$TARGET_CHARM_NAME/etc/cron/$label
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schedule=$(relation-get schedule)
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if ! echo "$schedule" | egrep '^\s*(([0-9/,*-]+\s+){4,4}[0-9/,*-]+|@[a-z]+)\s*$' >/dev/null 2>&1; then
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err "Unrecognized schedule '$schedule'."
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exit 1
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fi
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## XXXvlab: how is this meant to works if there's multiples postgres (about PGHOST=?) ?
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## Warning: using '\' in heredoc will be removed in the final cron file, which
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## is totally wanted: cron does not support multilines.
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exclude_dbs=$(relation-get exclude-dbs 2>/dev/null) || true
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exclude_dbs=$(echo "$exclude_dbs" | shyaml get-values 2>/dev/null | xargs echo) || true
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## Warning: 'docker -v' will use HOST directory even if launched from
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## 'cron' container.
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file_put "$DST" <<EOF
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$schedule root lock $label -D -p 10 -c "\
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docker run --rm \
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-e PGHOST=\$POSTGRES_PORT_5432_TCP_ADDR \
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-e exclude_dbs=\"$exclude_dbs\" \
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-v /root/.pgpass:/root/.pgpass \
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-v \"$BASE_CHARM_PATH/resources/bin/pg-backup:/usr/sbin/pg-backup\" \
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-v \"$SERVICE_DATASTORE/var/backups/pg:/var/backups/pg\" \
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--entrypoint pg-backup \
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\"$DOCKER_BASE_IMAGE\"" 2>&1 | ts '\%F \%T \%Z' >> /var/log/cron/pg-backup_script.log
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EOF
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chmod +x "$DST"
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config-add "\
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$MASTER_TARGET_CHARM_NAME:
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links:
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- $MASTER_BASE_CHARM_NAME
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"
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