74 lines
2.7 KiB
Bash
Executable File
74 lines
2.7 KiB
Bash
Executable File
#!/bin/sh -e
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##### HARD-CODED CONFIG #####################################################
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CONF_DIR=/etc/prometheus
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CONF=$CONF_DIR/prometheus.yml
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##### GET SETTINGS ##########################################################
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config="$(cat "$__object/parameter/config")"
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retention_days="$(cat "$__object/parameter/retention-days")"
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storage_path="$(cat "$__object/parameter/storage-path")"
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rule_files="$(cat "$__object/parameter/rule-files")"
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# explorer in kB => convert; by default we go with 1/2 RAM
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[ "$target_heap_size" = "auto" ] && target_heap_size=$(($(cat "$__global/explorer/memory")*1024/2))
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##### INSTALL THE PACKAGE ###################################################
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require_pkg="" # what to require if I want to require "the package"
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require=""
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if [ -f "$__object/parameter/install-from-backports" ]; then
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os=$(cat "$__global/explorer/os")
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os_version=$(cat "$__global/explorer/os_version")
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case $os in
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devuan)
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[ "$os_version" = "ascii/ceres" ] && os_version='ascii' # "ascii" used in the repo URLs
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__apt_source backports --uri http://auto.mirror.devuan.org/merged --distribution $os_version-backports --component main
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require="$require __apt_source/backports" __package_apt prometheus --target-release $os_version-backports
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require_pkg="__package_apt/prometheus"
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;;
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*)
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echo "--install-from-backports is only supported on Devuan -- ignoring." >&2
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echo "Send a pull request if you require it." >&2
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exit 1
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;;
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esac
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else
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__package prometheus
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__package prometheus-blackbox-exporter
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require_pkg="__package/prometheus __package/prometheus-blackbox-exporter"
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fi
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##### PREPARE PATHS AND SUCH ################################################
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require="$require $require_pkg" __directory "$storage_path" --owner prometheus --parents
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##### CONFIGURE #############################################################
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FLAGS="--storage.tsdb.path $storage_path --storage.tsdb.retention $((retention_days*24))h --web.listen-address [::]:9090"
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# TODO it would be neat to restart prometheus on change -- __key_value really should have an --onchange parameter
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require="$require $require_pkg" \
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__key_value prometheus_args --file /etc/default/prometheus \
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--key "ARGS" --value "\"$FLAGS\"" --delimiter "=" \
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--onchange "service prometheus restart"
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require="$require __directory/$storage_path $require_pkg" \
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__config_file $CONF \
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--source "$config" \
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--group prometheus --mode 640 \
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--onchange "promtool check config $CONF && service prometheus restart"
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for file in $rule_files; do
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dest=$CONF_DIR/$(basename "$file")
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require="$require $require_pkg" \
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__config_file "$dest" \
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--source "$file" \
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--owner prometheus \
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--onchange "promtool check rules '$dest' && service prometheus restart"
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done
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