feat: enforce env vars with run.sh to start promtail

ObolNetwork · Jan 30, 2025 · f7d0f82 · f7d0f82
1 parent 04d2113
commit f7d0f82
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Showing 3 changed files with 18 additions and 2 deletions.
diff --git a/logging.yml b/logging.yml
@@ -2,12 +2,15 @@ services:
 
   promtail:
     image: grafana/promtail:${PROMTAIL_VERSION:-2.8.2}
+    environment:
+      CHARON_LOKI_ADDRESSES: ${CHARON_LOKI_ADDRESSES}
     command: -config.file=/etc/promtail/config.yml
     volumes:
-      - ./promtail/config.yml:/etc/promtail/config.yml
+      - ./promtail:/etc/promtail
       - /var/run/docker.sock:/var/run/docker.sock
     networks: [dvnode]
+    entrypoint: /etc/promtail/run.sh
     restart: unless-stopped
 
 networks:
-  dvnode:
+  dvnode:
diff --git a/promtail/config.yml → promtail/config.yml.example b/promtail/config.yml → promtail/config.yml.example
diff --git a/promtail/run.sh b/promtail/run.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+if [ -z "$CHARON_LOKI_ADDRESSES" ]; then
+  echo "Error: \$CHARON_LOKI_ADDRESSES variable is empty" >&2
+  exit 1
+fi
+
+sed "s|\$CHARON_LOKI_ADDRESSES|${CHARON_LOKI_ADDRESSES}|g" \
+    /etc/promtail/config.yml.example > /etc/promtail/config.yml
+
+# Start Promtail with the generated config
+/usr/bin/promtail \
+  -config.file=/etc/promtail/config.yml