forked from ungleich-public/cdist
__prometheus_server: switch to packages; assume prometheus 2.x
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@ -10,18 +10,12 @@ DESCRIPTION
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-----------
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Install and configure Prometheus (https://prometheus.io/).
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This type creates a daemontools-compatible service directory under /service/prometheus.
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Daemontools (or something compatible) must be installed (in particular, the command `svc` must be executable).
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Note that due to significant differences between Prometheus 1.x and 2.x, only 2.x is supported.
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REQUIRED PARAMETERS
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-------------------
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config
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Prometheus configuration file. It will be saved as /etc/prometheus/prometheus.yml on the target.
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listen-address
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Passed as web.listen-address.
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alertmanager-url
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Passed as alertmanager.url
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OPTIONAL PARAMETERS
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@ -32,8 +26,6 @@ rule-files
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Path to rule files. They will be installed under /etc/prometheus/<filename>. You need to include `rule_files: [/etc/prometheus/<your-pattern>]` in the config file if you use this.
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storage-path
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Where to put data. Default: /data/prometheus. (Directory will be created if needed.)
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target-heap-size
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Passed as storage.local.target-heap-size. Default: 1/2 of RAM.
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BOOLEAN PARAMETERS
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@ -49,22 +41,16 @@ EXAMPLES
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PROMPORT=9090
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ALERTPORT=9093
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__daemontools
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__golang_from_vendor --version 1.8.1 # required for prometheus and many exporters
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require="__daemontools __golang_from_vendor" __prometheus_server \
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--with-daemontools \
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__prometheus_server \
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--config "$__manifest/files/prometheus.yml" \
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--retention-days 14 \
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--storage-path /data/prometheus \
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--listen-address "[::]:$PROMPORT" \
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--rule-files "$__manifest/files/*.rules" \
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--alertmanager-url "http://monitoring1.node.consul:$ALERTPORT,http://monitoring2.node.consul:$ALERTPORT"
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--rule-files "$__manifest/files/*.rules"
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SEE ALSO
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--------
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:strong:`cdist-type__prometheus_alertmanager`\ (7), :strong:`cdist-type__daemontools`\ (7),
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:strong:`cdist-type__prometheus_alertmanager`\ (7), :strong:`cdist-type__grafana_dashboard`\ (7),
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Prometheus documentation: https://prometheus.io/docs/introduction/overview/
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AUTHORS
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@ -73,7 +59,7 @@ Kamila Součková <kamila--@--ksp.sk>
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COPYING
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-------
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Copyright \(C) 2017 Kamila Součková. You can redistribute it
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Copyright \(C) 2018 Kamila Součková. You can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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@ -1,52 +1,69 @@
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#!/bin/sh -e
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GOBIN=/opt/gocode/bin # where to find go binaries
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##### HARD-CODED CONFIG #####################################################
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CONF_DIR=/etc/prometheus
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CONF=$CONF_DIR/prometheus.yml
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LOGLEVEL=info
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##### GET SETTINGS ##########################################################
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config="$(cat "$__object/parameter/config")"
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retention_days="$(cat "$__object/parameter/retention-days")"
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storage_path="$(cat "$__object/parameter/storage-path")"
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listen_address="$(cat "$__object/parameter/listen-address")"
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alertmanager_url="$(cat "$__object/parameter/alertmanager-url")"
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target_heap_size="$(cat "$__object/parameter/target-heap-size")"
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rule_files="$(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 $__global/explorer/memory)*1024/2))
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##### INSTALL THE PACKAGE ###################################################
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FLAGS="config.file '$CONF'
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storage.local.path '$storage_path'
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storage.local.target-heap-size $(($target_heap_size)) # in bytes; should be 2/3 of available memory because it may be hungry
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storage.local.retention $(($retention_days*24))h # golang doesn't have days :D
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web.listen-address '$listen_address'
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alertmanager.url '$alertmanager_url'
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log.level $LOGLEVEL"
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if [ -f "$__object/parameter/install-from-backports" ]; then
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os=$(cat "$__global/explorer/os")
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lsb_codename=$(cat "$__global/explorer/lsb_codename")
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REAL_FLAGS="$(echo "$FLAGS" | sed -nE 's/^([^#]+).*/ --\1 \\/p')"
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case $os in
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devuan)
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if [ -z "$lsb_codename" ]; then
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echo "Command `lsb_release` not functional -- is package `lsb-release` installed?" >&2
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exit 1
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fi
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[ "$lsb_codename" = "n/a" ] && lsb_codename='ascii' # TODO this is a devuan bug that should be fixed soon => remove when no longer needed
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__apt_source backports --uri http://auto.mirror.devuan.org/merged --distribution $lsb_codename-backports --component main
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require="$require __apt_source/backports" __package_apt prometheus --target-release $lsb_codename-backports
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;;
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*)
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echo "--install-from-backports is only supported on Devuan -- ignoring" >&2
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echo "send a pull request if you require it" >&2
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;;
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esac
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else
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__package prometheus
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fi
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__go_get github.com/prometheus/prometheus/cmd/...
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##### PREPARE PATHS AND SUCH ################################################
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__user prometheus --system
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require="__user/prometheus" __directory "$storage_path" --owner prometheus --parents
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require="__user/prometheus" __directory "$CONF_DIR" --owner prometheus --parents
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require="__package_apt/prometheus" __directory "$storage_path" --owner prometheus --parents
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__daemontools_service prometheus --run "setuidgid prometheus $GOBIN/prometheus $REAL_FLAGS"
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##### CONFIGURE #############################################################
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require="$require __directory/$storage_path __user/prometheus" \
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FLAGS="--storage.tsdb.path $storage_path --storage.tsdb.retention $(($retention_days*24))h"
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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="$require __package_apt/prometheus" \
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__key_value prometheus_args --file /etc/default/prometheus --key "ARGS" --value "\"$FLAGS\"" --delimiter "="
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require="$require __directory/$storage_path __package_apt/prometheus" \
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__config_file $CONF \
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--source $config \
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--group prometheus --mode 640 \
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--onchange "$GOBIN/promtool check-config $CONF && svc -h /service/prometheus"
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--onchange "promtool check config $CONF && service prometheus reload"
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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 __directory/$CONF_DIR __user/prometheus" \
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require="$require __package_apt/prometheus" \
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__config_file "$dest" \
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--source "$file" \
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--owner prometheus \
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--onchange "$GOBIN/promtool check-rules '$dest' && svc -h /service/prometheus"
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--onchange "promtool check rules '$dest' && service prometheus reload"
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done
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@ -0,0 +1 @@
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install-from-backports
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@ -1,3 +1 @@
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alertmanager-url
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config
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listen-address
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