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59 lines
1.7 KiB
59 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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## - use actions of other side for other side's business logic
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if [ -z "$RELATION_DATA_FILE" ]; then
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err "$FUNCNAME: relation does not seems to be correctly setup."
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exit 1
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fi
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if ! [ -r "$RELATION_DATA_FILE" ]; then
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err "$FUNCNAME: can't read relation's data." >&2
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exit 1
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fi
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if [ "$(cat "$RELATION_DATA_FILE" | shyaml get-type)" == "str" ]; then
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## Cached version already there
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## Note that we rely on the fact that when the relations
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## options are changed in the `compose.yml` file, the relation
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## data file is recreated from the values of the
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## `compose.yml`.
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info "Previous relation data is still valid."
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exit 0
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fi
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. lib/common
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schedule=$(relation-get schedule) || true
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lock_opts=(-D -p 10)
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command=(
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docker run --rm \
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--network ${PROJECT_NAME}_default \
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-v "$LOCAL_DB_PASSFILE":/root/.my.cnf \
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-v "$HOST_CHARM_STORE/${CHARM_REL_PATH#${CHARM_STORE}/}/resources/bin/mysql-backup:/usr/sbin/mysql-backup" \
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-v "$SERVICE_DATASTORE/var/backups/mysql:/var/backups/mysql" \
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--entrypoint mysql-backup \
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"$DOCKER_BASE_IMAGE" --host "${SERVICE_NAME}"
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)
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quoted_command=()
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for arg in "${command[@]}"; do
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quoted_command+=("$(printf "%q" "$arg")")
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done
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printf "(%s) {%s} %s\n" \
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"$schedule" \
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"${lock_opts[*]}" \
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"${quoted_command[*]}" > "$RELATION_DATA_FILE"
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