fix(grafana): run entrypoint with POSIX sh

.github/workflows/grafana-image-smoke-test.yml

@@ -0,0 +1,41 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: grafana-image-smoke-test
+
+on:
+  pull_request:
+    branches:
+      - main
+      - release-*
+    paths:
+      - 'grafana/**'
+      - '.github/workflows/grafana-image-smoke-test.yml'
+
+jobs:
+  grafana-image-smoke-test:
+    name: grafana image smoke test (${{ matrix.db }})
+    runs-on: ubuntu-24.04
+    strategy:
+      fail-fast: false
+      matrix:
+        db: [mysql, postgresql]
+    steps:
+      - uses: actions/checkout@v7
+      - name: Build grafana image
+        run: docker build -t devlake-dashboard:smoke grafana
+      - name: Start image and check datasource
+        run: grafana/scripts/smoke-test.sh devlake-dashboard:smoke ${{ matrix.db }}

grafana/scripts/entrypoint.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.
@@ -271,14 +271,18 @@ fi
 
 echo "Creating datasource via API..."
 DATASOURCE_OK=false
+# The grafana/grafana image (Alpine/busybox) ships no bash, so stay POSIX sh.
+NL='
+'
 for i in $(seq 1 10); do
   # "|| true": a failing curl must not end this script (set -e) and with it the
   # container; the status check below reports the problem instead.
   RESPONSE=$(grafana_api -w '\nHTTP_STATUS=%{http_code}' -X POST "${GRAFANA_API}/datasources" \
     -H "Content-Type: application/json" \
     -d @"$PAYLOAD_FILE" 2>&1) || true
   STATUS="${RESPONSE##*HTTP_STATUS=}"
-  RESPONSE="${RESPONSE%$'\n'HTTP_STATUS=*}"
+  RESPONSE="${RESPONSE%HTTP_STATUS=*}"
+  RESPONSE="${RESPONSE%"$NL"}"
 
   if [ "$STATUS" = "401" ] || [ "$STATUS" = "403" ]; then
     # Retrying cannot help: the credentials do not match the Grafana admin.

grafana/scripts/smoke-test.sh

@@ -0,0 +1,101 @@
+#!/usr/bin/env bash
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Smoke test for the devlake-dashboard (Grafana) image: starts it next to a
+# throwaway database and checks that the entrypoint runs, Grafana becomes
+# healthy and the DevLake datasource is created and can reach the database.
+#
+# Usage: grafana/scripts/smoke-test.sh <image> [mysql|postgresql]
+# Uses uniquely named containers/network only; nothing else is touched.
+
+set -euo pipefail
+
+IMAGE="${1:?usage: $0 <image> [mysql|postgresql]}"
+DB_TYPE="${2:-mysql}"
+TIMEOUT="${SMOKE_TIMEOUT:-180}"
+MYSQL_IMAGE="${MYSQL_IMAGE:-mysql:8.4}"
+POSTGRES_IMAGE="${POSTGRES_IMAGE:-postgres:18}"
+
+PREFIX="grafana-smoke-$$"
+NET="$PREFIX-net"
+DB="$PREFIX-db"
+GRAFANA="$PREFIX-grafana"
+
+cleanup() {
+  docker rm -fv "$GRAFANA" "$DB" >/dev/null 2>&1 || true
+  docker network rm "$NET" >/dev/null 2>&1 || true
+}
+trap cleanup EXIT
+
+fail() {
+  echo "FAIL: $*"
+  echo "----- grafana container logs -----"
+  docker logs "$GRAFANA" 2>&1 | grep -v 'logger=' | tail -50 || true
+  exit 1
+}
+
+docker network create "$NET" >/dev/null
+
+case "$DB_TYPE" in
+  mysql)
+    docker run -d -q --name "$DB" --network "$NET" \
+      -e MYSQL_ROOT_PASSWORD=admin -e MYSQL_DATABASE=lake \
+      -e MYSQL_USER=merico -e MYSQL_PASSWORD=merico \
+      "$MYSQL_IMAGE" >/dev/null
+    DS_UID="devlake-mysql-api"
+    ;;
+  postgresql)
+    docker run -d -q --name "$DB" --network "$NET" \
+      -e POSTGRES_DB=lake -e POSTGRES_USER=merico -e POSTGRES_PASSWORD=merico \
+      "$POSTGRES_IMAGE" >/dev/null
+    DS_UID="devlake-postgres-api"
+    ;;
+  *)
+    echo "unknown database type '$DB_TYPE' (expected mysql or postgresql)"
+    exit 2
+    ;;
+esac
+
+docker run -d --name "$GRAFANA" --network "$NET" \
+  -e DATABASE_TYPE="$DB_TYPE" -e DATABASE_HOST="$DB" \
+  "$IMAGE" >/dev/null
+
+echo "Waiting for $IMAGE ($DB_TYPE) to create its datasource..."
+deadline=$((SECONDS + TIMEOUT))
+until docker logs "$GRAFANA" 2>&1 | grep -q "Datasource created successfully"; do
+  if [ "$(docker inspect -f '{{.State.Running}}' "$GRAFANA")" != "true" ]; then
+    fail "grafana container exited (exit code $(docker inspect -f '{{.State.ExitCode}}' "$GRAFANA"))"
+  fi
+  if docker logs "$GRAFANA" 2>&1 | grep -q "ERROR: datasource"; then
+    fail "entrypoint could not create the datasource"
+  fi
+  [ "$SECONDS" -lt "$deadline" ] || fail "datasource not created within ${TIMEOUT}s"
+  sleep 3
+done
+
+api() {
+  docker exec "$GRAFANA" curl -fsS --user admin:admin "http://localhost:3000/api/$1"
+}
+
+api health >/dev/null || fail "/api/health not OK"
+
+# The database may still be initialising; retry the datasource health check.
+until api "datasources/uid/$DS_UID/health" >/dev/null 2>&1; do
+  [ "$SECONDS" -lt "$deadline" ] || fail "datasource $DS_UID cannot reach the $DB_TYPE database"
+  sleep 3
+done
+
+echo "OK: $IMAGE starts and datasource $DS_UID is healthy ($DB_TYPE)"