79 lines
1.7 KiB
Markdown
79 lines
1.7 KiB
Markdown
> 本文作者：丁辉
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# 通过副本控制实现金丝雀发布
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[官方文档](https://kubernetes.io/zh-cn/docs/concepts/workloads/controllers/deployment/#canary-deployment)
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## 通过副本数控制
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**操作步骤：**
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1. 先部署稳定版本（v1，9个副本）
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2. 部署金丝雀版本（v2，1个副本）
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3. Service会自动将约9%的流量（1/10）导向v2
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4. 观察监控，如果v2正常，逐步增加v2副本数，减少v1副本数
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## 开始部署
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部署测试示例 Nginx Deployment v1和v2
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1. 部署 Pod-Nginx-v1
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```bash
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kubectl apply -f https://gitee.com/offends/Kubernetes/raw/main/File/Yaml/nginx-deployment-v1.yaml
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```
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2. 部署 Pod-Nginx-v2
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```bash
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kubectl apply -f https://gitee.com/offends/Kubernetes/raw/main/File/Yaml/nginx-deployment-v2.yaml
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```
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3. 修改副本数数量
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- v1 配置为 9
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```bash
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kubectl scale deployment/nginx-deployment-1 --replicas=9
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```
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- v2 配置为 1
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```bash
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kubectl scale deployment/nginx-deployment-2 --replicas=1
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```
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4. 部署 Service（同时选择v1和v2的Pod）
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```yaml
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cat <<EOF | kubectl apply -f -
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apiVersion: v1
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kind: Service
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metadata:
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name: nginx-deployment-service
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spec:
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selector:
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app: nginx # 同时选择两个版本的Pod
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ports:
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- port: 80
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targetPort: 80
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EOF
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```
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5. 修改权重将流量导向 v2
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- 逐步增加 v2
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```bash
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kubectl scale deployment/nginx-deployment-2 --replicas=10
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```
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- 降低 v1
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```bash
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kubectl scale deployment/nginx-deployment-1 --replicas=0
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```
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6. 中途访问 Nginx 发现正在随着我们扩展和缩小副本数量，逐步迁移流量。
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