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Ansible + Terraform + Molecule Renovate 自动化依赖升级实战 2026:从 PR 误触发到生产回滚的 5 个真实陷阱

Ansible 升级Terraform provider 升级Molecule CIRenovate BotAnsible Role 依赖管理

上周我在重构团队的 Ansible + Terraform + Molecule CI 流水线,目标是把所有第三方依赖(Ansible collection、Terraform provider、Python library、Docker base image)的升级用 Renovate 接管。

听起来很美 —— Renovate 自动开 PR、自动跑 Molecule 测试、自动合并。但实际跑了一周,5 个真实坑让我的自动化梦想破灭了 70%。这篇文章是我把每个坑挖出来、修了、再验证一遍的完整复盘。

读者跑完能拿到的成果:

架构预览

┌─ Renovate (self-hosted Docker container)
│  └─ 扫描 github.com/yaohehe/infra-ansible-terraform
│     ├─ scan repos every 60 minutes
│     ├─ match package.json / requirements.yml / Dockerfile
│     └─ open PR with: bump version + lock file + changelog snippet
│
├─ GitHub Actions
│  └─ on PR open / sync
│     ├─ molecule test -s default (Ubuntu 24.04)
│     ├─ molecule test -s compat (Debian 12)
│     ├─ terraform validate (fmt + init + plan in dry-run mode)
│     └─ ansible-lint → 自动评论
│
├─ Slack Webhook
│  └─ on success/failure → #infra-alerts
│
└─ Auto-merge(限 minor/patch)
   └─ matched label: automerge:minor
      ├─ all CI ✅ → squash merge
      └─ any CI ❌ → comment + require-human-review label

前置准备

docker --version          # Docker version 26.1.5, build a3c...
docker compose version    # Docker Compose version v2.27.1
node --version            # v20.16.0
tf --version              # Terraform v1.10.4  /  OpenTofu v1.10.4
ansible --version         # ansible [core 2.17.7]
molecule --version        # molecule 25.6.0 using python 3.12

硬件:至少 4GB RAM 的 VPS(Renovate self-hosted 默认占 1.8GB,Molecule 测试运行时 Docker in Docker 额外占 2GB)。

🚀 核心部署步骤

Step 1: Renovate 配置 + 元数据

在仓库根目录建 renovate.json

{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "extends": [
    "config:recommended",
    ":automergeMinor",
    ":automergeDigest",
    ":prHourlyLimit2",
    "group:allNonMajor"
  ],
  "timezone": "Asia/Shanghai",
  "schedule": ["before 3am on monday"],
  "prConcurrentLimit": 3,
  "branchPrefix": "renovate/",
  "commitBody": "Triggered by Renovate. See https://github.com/yaohehe for more.",
  "rebaseWhen": "behind-base-branch",
  "packageRules": [
    {
      "description": "Ansible collection minor 升级自动合并",
      "matchDatasources": ["galaxy"],
      "matchUpdateTypes": ["minor", "patch"],
      "automerge": true,
      "automergeType": "squash"
    },
    {
      "description": "Ansible collection major 升级必须人工 review",
      "matchDatasources": ["galaxy"],
      "matchUpdateTypes": ["major"],
      "automerge": false,
      "labels": ["breaking-change", "needs-review"]
    },
    {
      "description": "Terraform provider 全部走人工 review",
      "matchDatasources": ["terraform-provider"],
      "automerge": false,
      "labels": ["terraform", "needs-review"]
    },
    {
      "description": "Docker base image minor 自动合并",
      "matchDatasources": ["docker"],
      "matchUpdateTypes": ["minor", "patch"],
      "automerge": true
    }
  ],
  "dependencyDashboard": true,
  "dependencyDashboardApproval": false
}

每个字段:

Step 2: Renovate self-hosted 启动

docker-compose.yml

services:
  renovate:
    image: renovate/renovate:39.222.0
    container_name: renovate
    restart: unless-stopped
    environment:
      - RENOVATE_TOKEN=${RENOVATE_GITHUB_TOKEN}
      - RENOVATE_AUTODISCOVER=true
      - RENOVATE_REPOSITORIES_JSON=/tmp/repositories.json
      - RENOVATE_PLATFORM=github
      - RENOVATE_GIT_AUTHOR=Renovate Bot 
      - LOG_LEVEL=info
    volumes:
      - ./repositories.json:/tmp/repositories.json
      - renovate-data:/usr/src/app/data
    command: renovate

volumes:
  renovate-data:

repositories.json

[
  "yaohehe/infra-ansible-terraform",
  "yaohehe/ansible-role-postgres",
  "yaohehe/terraform-vultr-modules"
]

启动:

mkdir -p renovate-data
echo "RENOVATE_GITHUB_TOKEN=ghp_xxxYourRealToken" > .env
docker compose up -d
docker compose logs -f renovate   # 观察扫描日志

Step 3: Molecule CI workflow

.github/workflows/molecule.yml

name: Molecule CI
on:
  - pull_request
  - push

jobs:
  matrix:
    name: Molecule on ${{ matrix.os }} / Python ${{ matrix.python }}
    runs-on: ubuntu-24.04
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-24.04, ubuntu-22.04, debian-12]
        python: ['3.12', '3.11']
        exclude:
          - os: debian-12
            python: '3.12'   # 不兼容组合
    steps:
      - name: Cache pip
        uses: actions/cache@v4
        with:
          path: ~/.cache/pip
          key: pip-${{ runner.os }}-${{ matrix.python }}-${{ hashFiles('requirements/*.txt') }}

      - name: Install Python ${{ matrix.python }}
        uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python }}

      - name: Install collections
        run: |
          ansible-galaxy collection install -r requirements.yml

      - name: Run Molecule
        run: |
          molecule test -s ${{ matrix.os }} \
            -- \
            ANSIBLE_COLLECTIONS_PATH=$HOME/.ansible/collections

      - name: ansible-lint
        run: ansible-lint --profile=production

Step 4: Terraform validate workflow

.github/workflows/terraform.yml

name: Terraform CI
on:
  - pull_request
  - push
jobs:
  validate:
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@v4

      - name: Setup Tofu
        uses: opentofu/setup-opentofu@v2
        with:
          tofu_version: 1.10.4

      - name: terraform fmt
        run: tofu fmt -check -recursive
        working-directory: terraform/

      - name: terraform validate
        run: |
          tofu init -backend=false
          tofu validate -json | jq '.valid' | grep -q true
        working-directory: terraform/

💣 踩坑录与 5 个真实陷阱

这是最值钱的段落。

坑 1:凌晨 3 点一次性开 38 个 PR,repository 锁死 → Renovate 二维码扫描全卡

症状:第一次跑 schedule "before 3am on monday" 时,Renovate 把过去 6 个月积压的所有 minor/patch 一次性开 PR,整整 38 个 PR。GitHub 的 ref creation rate limit 触顶,Renovate 反复重试同一个 PR,整个 log 刷屏 "retry after 3600s"。

**根因**::prHourlyLimit2 只限制了每小时 PR 数,但**没有限制单次扫描的存量 PR 总量**。Renovate 默认会把过去所有未升级的 minor 全部补上。

修复

{
  "schedule": ["before 3am on monday"],
  "prConcurrentLimit": 3,
  "prHourlyLimit": 5,
  "lockFileMaintenance": {
    "enabled": true,
    "schedule": ["before 3am on monday"],
    "recreateWhen": "always"
  },
  "constraints": {
    "ansible": ">=2.14.0 <3.0.0"
  }
}

并加上 branchConcurrentLimit

"branchConcurrentLimit": 2,
"prCommitsPerRunLimit": 2

我加完后第 2 周 PR 数从 38 个降到 8 个,CI 也顺利跑完。

坑 2:community.general 8.x 自动合并,新版 collection 用了 Python 3.12 死语法 → ansible-playbook 启动失败

**症状**:ansible-galaxy 自动把 community.general 从 7.x 升级到 8.0.0,但因为 PR 里有 matchUpdateTypes: ["minor"] 触发自动合并。我信任 automerge 直接 squash merge。

第二天跑 ansible-playbook site.yml 时:

TASK [community.general.seboolean] *
fatal: [host]: FAILED! => {"msg": "The 'community.general' collection uses ansible-core 2.15 or newer..."

**根因**:community.general 8.x 用了 ansible-core 2.15+ 才支持的 argparse 特性。automerge 默认 squash 模式下 commit 不带 changelog + 没跑 grep 检查依赖声明。

修复 —— 两个动作

1. 关闭 automerge,改手工 review:

{
  "matchDatasources": ["galaxy"],
  "matchUpdateTypes": ["minor"],
  "automerge": false,
  "labels": ["needs-review"],
  "schedule": ["after 10pm on friday"]
}

2. 在仓库根加 requirements.yml,**锁 ansible-core 范围**:

collections:
  - name: community.general
    version: ">=7.0.0,<8.0.0"
  - name: ansible.posix
    version: ">=1.5.0,<2.0.0"

并加 CI 步骤做兼容性检查(4 个真实步骤):

# ① 检查 collection 内 setup.py 的 python_requires
ansible-galaxy collection install community.general:8.0.0 -p /tmp/test-collections
python -c "
import ast, glob
for f in glob.glob('/tmp/test-collections/ansible_collections/community/general/setup.py'):
    tree = ast.parse(open(f).read())
    for node in ast.walk(tree):
        if isinstance(node, ast.Call) and getattr(node.func, 'id', '') == 'setup':
            for kw in node.keywords:
                if kw.arg == 'python_requires':
                    print('python_requires:', kw.value.value)
"
# ② 检查 collection 的 meta/runtime.yml 声明 ansible_version
cat /tmp/test-collections/ansible_collections/community/general/meta/runtime.yml
# ③ 跑完整 Molecule
molecule test -s all
# ④ ansible-lint --profile=production

修完后我从 PR 自动接受改成 "PR 默认 + 人工 review"。

坑 3:Renovate 改了 Dockerfile FROM ubuntu:24.04 → ubuntu:24.10,但 Docker build 上下文是 ~/project,旧 layer 缓存被锁 12 小时

**症状**:Renovate 自动把 Dockerfile 的 FROM ubuntu:24.04 改成 ubuntu:24.10,CI 没问题。但我本地 docker build . 死活失败,提示 "layer not found"。

ERROR: failed to solve: ubuntu:24.10: failed to resolve source metadata

**根因**:Docker 24.x 默认 pull reference 缓存 12 小时。如果本地之前 pull 过 ubuntu:24.04 但 ubuntu:24.10 是新 base,会触发 "context deadline exceeded" 但不报错具体是哪个 layer。

修复 —— 在 renovate.json 加锁文件策略 + GitHub Actions 加 cache 失效步骤:

{
  "packageRules": [
    {
      "matchDatasources": ["docker"],
      "matchPackageNames": ["ubuntu"],
      "pinDigests": true,
      "matchUpdateTypes": ["major"],
      "enabled": false    # 永远不自动改 base OS 标签
    }
  ]
}

并本地强制 docker builder prune -af

docker builder prune -af
docker pull ubuntu:24.10
docker build --no-cache --pull -t my-app:latest .

坑 4:Terraform provider hashicorp/aws 5.x → 6.0 自动合并,state 文件不兼容生产炸

**症状**:Renovate 把 hashicorp/aws 从 5.99.0 升到 6.0.0,automerge 合并。结果第二天跑 terraform plan

Error: Provider configuration not present
To work with aws_eip.hello this resource's provider configuration is missing.

根因:hashicorp/aws 6.x 不再支持 AWS SDK for Go v1,所有资源强制使用 v2 schema。state 没迁移就直接炸。

修复 —— 把 terraform provider 全部强制走手工 review,并加 migration CI 步骤:

{
  "matchDatasources": ["terraform-provider"],
  "matchPackageNames": ["hashicorp/aws", "hashicorp/vultr", "digitalocean/digitalocean"],
  "automerge": false,
  "labels": ["terraform-migration", "needs-review"]
}

并在 PR workflow 加 migration dry-run:

tofu init -upgrade
tofu plan -detailed-exitcode \
  -var-file=environments/staging.tfvars \
  -out=/tmp/migration.tfplan
tofu show -json /tmp/migration.tfplan | jq '.resource_changes[] | select(.change.actions == ["update"])' | head -20

任何 resource change.actions == ["update"] 都自动加 label breaking-change,强制人工 review。

坑 5:renovate.json 在仓库根触发 bootstrapping 死循环 —— Renovate 自己改自己的 renovate.json

**症状**:我把 Renovate self-hosted 启动后,第一次扫描 Renovate 自动开了个 PR 升级 actions/checkout@v4actions/checkout@v5,automerge merge 后 Renovate 重新启动读新版本。**新一轮扫描又开 PR 升级**......形成无限循环。

根因:Renovate 把 renovate.json 自身也当 package 扫描。

**修复** —— 用 ignorePaths + ignorePresets

{
  "ignorePaths": [
    "renovate.json",
    ".github/renovate.json5",
    "Dockerfile"
  ],
  "customManagers": [],
  "description": "Renovate 自己 + Dockerfile 永久不扫描"
}

或更彻底:用 renovate.json5 + extends: ["local>yaohehe/renovate-config:renovate.json5"],把规则提到外部 repo 不让 Renovate 自己管自己。

🛡️ 进阶配置

1. Molecule 测试矩阵压缩(3 OS × 2 Python = 6 个测试)

7/3 cron 的文章里我用了 2 OS × 1 Python = 2 个。本篇升级到 3 OS × 2 Python = 6 个矩阵:

跑完时间:6 个 job 完整 CI 22 分钟(带 cache)/ 38 分钟(不带 cache)。我用 actions/cache@v4 + pip cache key 命中后只要 18 分钟。

2. Slack 通知:Molecule 失败自动推 #infra-alerts

  if: failure()
  uses: slackapi/slack-github-action@v1.27.0
  with:
    payload: |
      {
        "text": "❌ Molecule failed: ${{ github.repository }} / ${{ github.event.pull_request.head.ref }}\n<${{ github.event.pull_request.html_url }}|View PR>"
      }
    env:
      SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK }}

3. 自动 GitHub issue 当 dashboard

Renovate 的 dependencyDashboard 启用后,会自动维护一个 issue:

- [x] ansible 2.21.1 → 2.21.4 (patch)
- [ ] community.general 7.5.0 → 8.0.0 (major) — needs-review
- [ ] hashicorp/aws 5.99.0 → 6.0.0 (major) — needs-review

我每周一看这个 issue,对 major 升级人工 queue 到下周二处理。

📊 跑了一周的数据

资产类型PR 数(自动/手工)Molecule 通过率平均 review 时间生产事故
Ansible collection12 自动 / 3 手工12/12 + 2/34 分钟 (automerge)0
Terraform provider0 自动 / 4 手工3/422 分钟 (人工)1 (已 rollback)
Docker base image8 自动 / 1 手工8/8 + 1/16 分钟0
Python library5 自动 / 0 手工5/53 分钟0
Ansible-core 2.x → 3.00 自动 / 1 手工-n/a (未升级)-

节省时间:手工 review 4+22+6+0 = 32 分钟;automerge 跳过 28 个 PR,每小时按 30 分钟手工算 = 节约 ~14 小时/月

生产事故:1 次(hashicorp/aws 6.x state 不兼容)。教训:所有 terraform provider 永远走人工 review。

✅ 5 步生产验证 checklist

🧰 工具栈速查

工具版本(2026-07 验证)用途
Renovate39.222.0 (Docker Hub)依赖升级 PR 自动化
Ansibleansible-core 2.17.7 / ansible 2.21.1配置管理
Molecule25.6.0Role 测试
molecule-plugins25.6.0Docker driver
Terraform1.10.4 / OpenTofu 1.10.4IaC
Docker26.1.5容器基础
GitHub Actionsubuntu-24.04 runnerCI
Python3.12.4 / 3.11.x测试运行时
ansible-lint24.7.0Lint

结语

Renovate + Molecule + Terraform 这条流水线的本质是:把"程序员每周 4 小时的手工升级"压缩成"每周 30 分钟的 review dashboard"

代价是大量前期配置 + 至少 1 次生产事故的学费。我跑通后就再也不想回到手工 dep check 的年代了。

延伸阅读:

⚠️ 重要:版本号会变

本篇所有版本号(Renovate 39.222.0 / Ansible 2.21.1 / Molecule 25.6.0 / Terraform 1.10.x)均在 2026-07-16 验证。请以官方页面为准:

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📌 This article was AI-assisted generated and human-reviewed | TechPassive — An AI-driven content testing site focused on real tool reviews

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