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prometheus: Update default tsdb directory handling

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Use /srv/prometheus instead of /data, because user `prometheus` doens't
have permissions to create `/data/` in `/`.

Instead this commit puts prometheus data into `/srv/prometheus` by
default, which is a cleaner path, and it'll create tsdb path & then assign
required permissions on each prometheus service start.

This way, also, the cases when users re-configure tsdb to point to
external USB - it'll also be created and assigned required permissions for
prometheus.

Signed-off-by: Alex Simkin <sashasimkin@gmail.com>
This commit is contained in:
Alex Simkin 2021-07-31 11:43:58 +03:00 committed by 1582130940
parent ebd52e9a6c
commit e642f308ba
3 changed files with 11 additions and 2 deletions
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3
utils/prometheus/Makefile
View File

@ -47,6 +47,9 @@ Prometheus, a Cloud Native Computing Foundation project, is a systems and
service monitoring system. It collects metrics from configured targets at given
intervals, evaluates rule expressions, displays the results, and can trigger
alerts if some condition is observed to be true.
Default tsdb path is /srv/prometheus, you might want to edit /etc/config/prometheus
in order to place it on USB storage or external SD card.
endef
define Package/prometheus/install

8
utils/prometheus/files/etc/init.d/prometheus
View File

@ -12,8 +12,14 @@ start_service() {
local web_listen_address
config_load "prometheus"
config_get config_file prometheus config_file "$CONFFILE"
config_get storage_tsdb_path prometheus storage_tsdb_path "/data"
config_get storage_tsdb_path prometheus storage_tsdb_path "/srv/prometheus"
config_get web_listen_address prometheus web_listen_address "127.0.0.1:9090"
# Create tsdb dir & permissions if needed
if [ ! -d "$storage_tsdb_path" ]; then
mkdir "$storage_tsdb_path"
chown prometheus:prometheus "$storage_tsdb_path"
fi;
procd_open_instance
procd_set_param command "$PROG"

2
utils/prometheus/files/etc/uci-defaults/prometheus-defaults
View File

@ -6,7 +6,7 @@ uci -q get prometheus.prometheus || {
uci -q batch <<EOF
set prometheus.prometheus=prometheus
set prometheus.prometheus.config_file='/etc/prometheus.yml'
set prometheus.prometheus.storage_tsdb_path='/data'
set prometheus.prometheus.storage_tsdb_path='/srv/prometheus'
set prometheus.prometheus.web_listen_address='127.0.0.1:9090'
commit prometheus
EOF