feat: optionally push to prometheus and loki

.env.sample

@@ -6,14 +6,18 @@ DOMAIN=monitoring-ng.example.com
 ENABLE_BACKUPS=true
 
 SECRET_BASIC_AUTH_VERSION=v1
-# LOKI_PUSH_URL=https://loki.monitoring.example.org/loki/api/v1/push
+# Enable this to send logs to a Loki server, adapt DOMAIN if server is
+# remote
+# LOKI_PUSH_URL=https://loki.$DOMAIN/loki/api/v1/push
 
+# Enable this to send metrics to a Prometheus server, adapt DOMAIN if
+# server is remote
+# PROMETHEUS_REMOTE_WRITE_URL=https://prometheus.$DOMAIN/api/v1/write
 
 # Monitoring Server
 #
 ## Prometheus
 # COMPOSE_FILE="$COMPOSE_FILE:compose.prometheus.yml"
-# PROMETHEUS_REMOTE_WRITE_URL=https://prometheus.$DOMAIN/api/v1/write
 # PROMETHEUS_RETENTION_TIME=1y
 #
 ## Prometheus Pushgateway

abra.sh

@@ -11,7 +11,7 @@ export PROMETHEUS_YML_VERSION=v2
 export MATRIX_ALERTMANAGER_CONFIG_VERSION=e
 export MATRIX_ALERTMANAGER_ENTRYPOINT_VERSION=a
 export GRAFANA_ALERTS_NODE_VERSION=v1c
-export CONFIG_ALLOY_VERSION=v6
+export CONFIG_ALLOY_VERSION=v7
 
 # creates a default prometheus scrape config for a given node
 add_node(){

config.alloy.tmpl

@@ -7,6 +7,7 @@ discovery.docker "linux" {
   host = "unix:///var/run/docker.sock"
 }
 
+{{ if ne (env "PROMETHEUS_REMOTE_WRITE_URL") "" }}
 prometheus.exporter.cadvisor "docker" {
 }
 
@@ -38,7 +39,9 @@ prometheus.remote_write "prometheus" {
     }
   }
 }
+{{ end }}
 
+{{ if ne (env "LOKI_PUSH_URL") "" }}
 loki.source.docker "docker" {
   host       = "unix:///var/run/docker.sock"
   targets    = discovery.docker.linux.targets
@@ -56,3 +59,4 @@ loki.write "loki" {
     }
   }
 }
+{{ end }}