build+deploy: 编译加 -trimpath，镜像改 lghost/opsxsql，K8s 部署到 sql 命名空间

1. -trimpath（抹除源码绝对路径）
   - Dockerfile: go build 加 -trimpath
   - run.sh: 两处 go build 加 -trimpath
   效果：二进制内 /app/backend/ 绝对路径命中 66 → 0（module 相对路径 sql-platform/ 仍保留，
        那是 Go 的正常行为，-trimpath 只去绝对前缀）

2. 镜像
   - kubernetes/deployment.yaml: opsxsql:latest → lghost/opsxsql:latest
   - kubernetes/install.sh: 默认 IMAGE 改 lghost/opsxsql:latest
   - 已构建并推送：lghost/opsxsql:latest (digest 70562a408cae, 25.2MB)

3. K8s 部署验证（namespace: sql）
   - Deployment opsxsql 1/1 Running，0 重启
   - Pod: opsxsql-695444d6b9-chrzp (node 172.19.0.161)
   - Service opsxsql.sql.svc.cluster.local:80
   - PVC opsxsql-data Bound 10Gi (cbs)
   - Secret opsxsql-secrets 自动生成（SECRET_KEY / JWT_SECRET）
   - /health → {"backend":"go","status":"ok","version":"0.4.0"}
   - 首页正常，seed 完成（26 条审核规则 + LDAP 默认配置）

部署命令：bash kubernetes/install.sh

Dockerfile

@@ -24,21 +24,33 @@ WORKDIR /app/backend
 COPY backend/go.* ./
 RUN go mod download
 COPY backend/ ./
-RUN CGO_ENABLED=1 GOOS=linux go build -ldflags="-s -w" -o /out/opsxsql ./cmd/server/
+RUN CGO_ENABLED=1 GOOS=linux go build -trimpath -ldflags="-s -w" -o /out/opsxsql ./cmd/server/
 
 # ---------------------------------------------------------------
 # Stage 3: gh-ost 在线变更工具(静态二进制,按架构取包)
+#
+# 注意：GitHub release 的实际 asset 名不是 gh-ost-linux-<arch>，而是：
+#   amd64: gh-ost                              （裸二进制，18MB）
+#   arm64: gh-ost-binary-linux-arm64-<ts>.tar.gz（tar 包）
 # ---------------------------------------------------------------
 FROM alpine:3.20 AS ghost
 ARG TARGETARCH
-RUN apk add --no-cache curl && \
+ARG GH_OST_VER=v1.1.9
+ARG GH_OST_ARM64_ASSET=gh-ost-binary-linux-arm64-20260501022029.tar.gz
+RUN mkdir -p /out && \
+    apk add --no-cache curl tar && \
     case "${TARGETARCH}" in \
-      arm64) GH_ARCH="arm64" ;; \
-      *) GH_ARCH="amd64" ;; \
+      arm64) \
+        curl -fsSL -o /tmp/gh.tgz \
+          "https://github.com/github/gh-ost/releases/download/${GH_OST_VER}/${GH_OST_ARM64_ASSET}" && \
+        tar -xzf /tmp/gh.tgz -C /tmp && \
+        mv /tmp/gh-ost-binary-linux-arm64-* /out/gh-ost ;; \
+      *) \
+        curl -fsSL -o /out/gh-ost \
+          "https://github.com/github/gh-ost/releases/download/${GH_OST_VER}/gh-ost" ;; \
     esac && \
-    curl -fsSL -o /out/gh-ost \
-      "https://github.com/github/gh-ost/releases/download/v1.1.9/gh-ost-linux-${GH_ARCH}" && \
-    chmod +x /out/gh-ost
+    chmod +x /out/gh-ost && \
+    ls -lh /out/gh-ost
 
 # ---------------------------------------------------------------
 # Stage 4: 运行时镜像