add loki

docker-entrypoint.sh

@@ -15,6 +15,30 @@ POSTGRES_PORT="${POSTGRES_PORT:-5432}"
 POSTGRES_SSL_MODE=${POSTGRES_SSL_MODE:-"require"}
 RESTIC_TAG=${RESTIC_TAG:-"pg_basebackup"}
 
+LOKI_URL="http://loki.montoring:3100/loki/api/v1/push"
+SERVICE_NAME="pg_backup"
+
+send_loki_status() {
+  local status="$1"
+  local timestamp_ns=$(date +%s%N)
+  curl -H "Content-Type: application/json" \
+    -s -X POST "$LOKI_URL" \
+    --data-raw "{
+      \"streams\": [
+        {
+          \"stream\": { \"service_name\": \"$SERVICE_NAME\" },
+          \"values\": [
+            [ \"$timestamp_ns\", \"$status\" ]
+          ]
+        }
+      ]
+    }"
+}
+
+trap 'send_loki_status failed' ERR
+
 PGPASSWORD=${POSTGRES_PASSWORD} pg_basebackup -h "${POSTGRES_HOST}" -d "sslmode=${POSTGRES_SSL_MODE}" -D /tmp/backup -U ${POSTGRES_USER} -F t -z -P
 restic --verbose backup -H ${RESTIC_HOST} --tag ${RESTIC_TAG} /tmp/backup
 restic forget --prune --keep-last 14 --host ${RESTIC_HOST}
+
+send_loki_status "done"