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