软件更新指南撰写

标题：ReleaseHub 升级至 2.1 版操作指南（SOP）

适用范围
- 适用于需要将现有 ReleaseHub 部署升级至 2.1 版本的团队。
- 部署形态可能包括：Kubernetes/Helm、Docker Compose、Linux 服务包或二进制安装。
- 实际命令、组件名称与配置键请以官方发布的 2.1 版本说明与贵方当前部署清单为准。本文提供标准化步骤与命令模板，占位符需按实际替换。

一、升级前准备（必做）
1. 审阅发布信息
- 阅读 ReleaseHub v2.1 的发布说明/变更日志/兼容性矩阵，标记：
  - 破坏性变更（Breaking Changes）
  - 新增/废弃配置项
  - 最低/推荐版本要求（Kubernetes、容器运行时、数据库、中间件、操作系统、CLI 等）
  - 数据库/存储迁移说明与脚本
2. 维护窗口与回滚策略
- 申请变更窗口与变更审批（含影响评估、风险登记、回滚触发条件）。
- 制定可演练的回滚方案（见“回滚指引”），明确恢复点目标（RPO）与恢复时间目标（RTO）。
3. 完整备份与快照
- 数据库：全量备份（并校验可恢复性）。
- 文件/对象存储：应用所依赖的持久化数据。
- 配置与密钥：配置文件、环境变量、Helm values、KMS/Secret 管理项。
- 平台快照（可选）：节点/卷/集群配置快照或快照点。
4. 环境清点与基线
- 记录当前版本与构件标签：应用、镜像、Chart、依赖服务版本。
- 清单化所有自定义插件/扩展/集成（CI/CD、Webhooks、SSO、审计、网关策略等）。
- 基线指标：关键服务的健康探针、延迟、吞吐、错误率与主要用户路径的基准。
5. 预生产演练
- 在测试/预生产环境完成一次完整升级与回滚演练，并形成记录（步骤、耗时、验证结果、问题与修复）。

二、升级步骤（通用流程）
1. 获取与校验 2.1 构件
- 从可信源获取 2.1 版本镜像/包/Chart。
- 使用校验和/签名进行完整性与来源验证。
- 在私有镜像仓库或本地制品库完成缓存与镜像预拉取。
2. 降低风险的流量策略
- 选择蓝绿、金丝雀或滚动升级策略。
- 如需停机升级，在入口网关/负载均衡设置维护页，排空连接并冻结变更。
3. 置备配置与密钥
- 按“2.1 配置变更表”增补新配置、移除废弃项、调整默认值差异。
- 对涉及密钥/证书轮换的改动，先在预生产验证后再在生产替换。
4. 执行升级
- 按部署形态执行组件升级（见后文“示例命令模板”）。
- 如版本要求数据库迁移或 CRD 更新，先执行并确认完成。
- 遵循“先控制面、后数据面；先无状态、后有状态”的顺序，逐步推进。
5. 观测与验证
- 实时查看升级日志与事件，关注迁移、探针、调度与副本状态。
- 使用预定义冒烟用例进行功能验证；对关键用户路径执行端到端验证。
- 确认监控/日志/告警恢复至正常基线，无新增高严重度告警。
6. 扩大流量与收尾
- 按金丝雀/蓝绿策略逐步提升流量至 100%。
- 移除维护开关，恢复 CI/CD 发布权限。
- 标记版本与变更记录，更新内部运行手册。

三、按部署形态的示例命令模板（占位符示例）
A. Kubernetes/Helm
- 准备
  - 比对 2.1 对应的 values 变更，合并至 <values.yaml>。
  - 如需更新 CRDs：
    - kubectl apply -f <crds_2.1.yaml> --server-side
- 升级（原地/滚动）
  - helm repo update
  - helm upgrade <release_name> <repo>/<chart_name> --version 2.1.x -f <values.yaml> --namespace <ns> --atomic --timeout 15m
- 验证
  - kubectl rollout status deploy/<component> -n <ns> --timeout=300s
  - kubectl get pods -n <ns>
  - 通过 /health 或 /ready 探针检查健康

B. Docker Compose
- 更新镜像标签为 2.1：
  - 编辑 docker-compose.yml，将 image: <registry>/releasehub:<2.1-tag>
- 拉取与重启
  - docker compose pull
  - docker compose up -d
  - docker compose ps && docker compose logs -f --tail=200
- 如需数据库迁移，执行官方迁移脚本/容器命令：
  - docker compose run --rm <service_or_tool> <migration_command>

C. Linux 服务包/二进制
- 停止服务：systemctl stop <releasehub-service>
- 安装 2.1 包或替换二进制：rpm/apt/解压
- 执行迁移工具：<install_dir>/bin/<migration_tool> upgrade --to 2.1
- 启动并验证：systemctl start <releasehub-service>; journalctl -u <service> -f

四、数据库与模式迁移
- 在应用服务放量前执行迁移。
- 确认迁移脚本为幂等，评估长事务与锁影响，必要时分批迁移或夜间执行。
- 设置超时与回滚点，迁移后做数据一致性抽样校验。

五、升级后验证清单
- 版本确认：UI/CLI/API 返回版本 2.1.x。
- 关键功能冒烟：环境创建/回收、构建/部署、集成触发、审计/权限、API 基础操作。
- API/SDK 兼容：重点验证存在 Breaking Changes 的端点与事件。
- 性能与稳定：与基线对比 QPS/延迟/错误率；无新资源泄漏与线程/句柄异常。
- 日志与告警：无持续错误日志；监控看板恢复到正常范围。
- 安全与合规：密钥、证书、加密算法和审计链正常；访问控制策略生效。

六、回滚指引（出现阻断性问题时）
1. 触发条件
- 冒烟失败、关键 SLO/SLA 未达标、数据不一致或重大安全/合规风险。
2. 回滚步骤
- 停止 2.1 流量（或切回蓝绿旧环境/Helm 上一修订）：
  - helm rollback <release_name> <revision> --namespace <ns> --wait
  - 或将镜像标签回退至稳定版本，docker compose up -d
- 恢复数据
  - 仅当迁移不可逆或数据损坏时，恢复升级前数据库与存储备份。
- 验证
  - 复查健康、功能、指标及告警，确认恢复正常后解除事件响应。
3. 事后
- 记录根因、改进措施与再次演练计划。

七、变更记录与文档更新
- 在内部知识库更新：版本、日期、环境、执行人、步骤、验证结果、遇到的问题与处理。
- 同步更新运行手册、监控仪表盘与告警阈值、灾备与应急预案。

附注
- 占位符（如 <repo>/<chart_name>、<migration_command>、配置键名、镜像标签格式等）请以 ReleaseHub 官方 2.1 文档与贵司实际部署为准。
- 若使用供应商托管的 SaaS 版本，升级通常由供应商统一执行，请以官方公告与状态页为准，并关注兼容性与客户侧变更要求（例如 CLI 版本、API 变更、生效日期）。

DocFlow Upgrade Guide: Version 1.4.3

Scope
- This guide describes a safe, repeatable procedure to upgrade DocFlow to version 1.4.3.
- Because DocFlow can be deployed using different methods, the procedure provides method-specific steps and placeholders. Replace placeholders (for example, <namespace>, <image-repo>, <service-name>) with values from your environment.
- If upgrading from a version earlier than 1.4.x, consult the vendor’s supported upgrade path and release notes before proceeding.

Pre‑upgrade Checklist
- Read the official DocFlow 1.4.3 release notes and verify any prerequisites, breaking changes, database migrations, configuration key changes, and deprecations.
- Confirm you have recent, restorable backups:
  - Database backup/snapshot
  - Persistent storage (attachments, uploads, etc.)
  - Configuration files and environment variables
  - Infrastructure as code (compose files, Helm values, manifests)
- Verify you have a tested rollback plan (including restoring database and reverting application version).
- Schedule a maintenance window if required by your change-management policy.
- Validate free disk space, resource headroom, and access to the artifact registry/package repository.

Change Control and Risk
- Expected downtime: varies by deployment and whether DB migrations are required. Zero-downtime may not be possible if schema changes are involved.
- Risk: medium. Ensure backups and a validated rollback.

Upgrade Steps

A. Docker Compose
1) Update the image tag to 1.4.3 in your docker-compose.yml for the DocFlow service. Example:
   image: <image-repo>/docflow:1.4.3
2) Pull the new image:
   docker compose pull <service-name>
3) Apply the update:
   docker compose up -d
4) If the release notes require database/schema migration, execute the documented migration procedure for 1.4.3 (for example, a one-off container/job as instructed by the vendor).
5) Verify logs and health:
   docker compose logs -f <service-name>
6) Confirm the running version via the application UI or version endpoint.

B. Docker (without Compose)
1) Pull the 1.4.3 image:
   docker pull <image-repo>/docflow:1.4.3
2) Stop and remove the existing container:
   docker stop <container-name> && docker rm <container-name>
3) Start a new container with the same volumes, networks, ports, and environment settings as before, but using the 1.4.3 tag. Example:
   docker run -d --name <container-name> \
     --env-file </path/to/env> \
     -v </path/to/data>:/var/lib/docflow \
     -p 80:80 \
     <image-repo>/docflow:1.4.3
4) Run any required 1.4.3 migration procedure as documented.
5) Verify logs:
   docker logs -f <container-name>
6) Confirm the application version.

C. Kubernetes (Helm)
1) Update your values.yaml (or set on the command line) to use image.tag: "1.4.3".
2) Upgrade the release:
   helm upgrade --install <release-name> <chart-name> \
     -n <namespace> \
     -f values.yaml \
     --set image.tag=1.4.3
3) Wait for rollout:
   kubectl rollout status deploy/<deployment-name> -n <namespace>
4) If migrations are required, execute the documented migration Job or Helm hook for 1.4.3 and monitor to completion.
5) Validate readiness probes, logs, and application version.

D. Linux Service (tarball/binary installation)
1) Download the official 1.4.3 artifact from the vendor’s release repository and verify checksum/signature.
2) Stop the DocFlow service:
   sudo systemctl stop docflow
3) Back up the current installation directory and configuration.
4) Replace binaries/files with the 1.4.3 release per vendor instructions; preserve configuration and data directories.
5) Start the service:
   sudo systemctl start docflow
6) Execute any required migration procedure for 1.4.3.
7) Check service status and logs:
   sudo systemctl status docflow
   journalctl -u docflow -f
8) Confirm the application version.

E. OS Package Manager (adjust to your repository/package name)
- Use your distribution’s pinning/version selection to install exactly 1.4.3. The exact package name and version string can differ by repository.
- Example (APT; replace with your actual package name and version string):
  sudo apt-get update
  sudo apt-get install docflow=1.4.3-<build>
- Example (YUM/DNF):
  sudo dnf install docflow-1.4.3-<release>
- Restart the service and run any required migration steps.

Post‑upgrade Validation
- Application health: verify the UI loads, APIs respond, and background jobs are operating.
- Version: confirm DocFlow reports 1.4.3 in the UI, CLI, or version endpoint.
- Data integrity: spot-check records, attachments, and search/index features.
- Logs and metrics: monitor error rates, latencies, and resource utilization for anomalies.
- Integrations: test key inbound/outbound integrations, webhooks, and authentication (SSO, OAuth, etc.).
- Clear application caches if recommended by the release notes.

Rollback Procedure
- If a critical issue occurs:
  - Application: revert to the previously known-good version.
    - Docker Compose: change image tag back and run docker compose up -d.
    - Docker: start a container with the prior tag.
    - Helm: helm rollback <release-name> <revision>.
    - System service/package: reinstall the previous version or restore the previous binaries.
  - Database: if schema migrations were applied and are not compatible with the previous version, restore the database from the pre-upgrade backup/snapshot.
  - Validate service health and version after rollback.

Audit and Documentation
- Record: start/end times, versions before/after, commands executed, migrations performed, and validation results.
- Capture logs of the upgrade window and store alongside change records.

Notes
- Always prefer pinned image digests (for example, <image-repo>/docflow@sha256:<digest>) in production to ensure supply-chain integrity.
- If any step in this guide conflicts with the official DocFlow 1.4.3 release notes, follow the vendor documentation.

If you share your deployment method (Docker/Compose, Kubernetes/Helm, package manager, or binary) and current version, I can provide an exact, command-level runbook tailored to your environment.