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nexus/wiki/concepts/Canary-Release.md
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title, type, tags, date
title type tags date
Canary Release concept
devops
deployment
release-management
automation
2025-03-01

Definition

金丝雀发布Canary Release是一种渐进式软件发布策略将新版本首先部署给小部分用户验证稳定性后再逐步扩大范围最终替换全部用户。这种策略降低了全量发布风险实现近乎零干扰的发布。

How It Works

Phase 1: 5% Traffic     Phase 2: 20% Traffic    Phase 3: 100% Traffic
┌─────────────────┐    ┌─────────────────┐     ┌─────────────────┐
│ New Version     │    │ New Version     │     │ Old Version     │
│    ██          │    │      ████      │     │     ░░░░       │
│ 5% users        │    │ 20% users       │     │  Rollback if   │
└─────────────────┘    └─────────────────┘     │  issues         │
     ↓                      ↓                  └─────────────────┘
  Monitor metrics      Monitor + Auto-rollback       ↓
  Auto-promote        if failure rate ↑         Full Deployment

Key Metrics to Monitor

指标 描述 告警阈值
Error Rate 错误率变化 +2%
Latency 响应时间 +50ms
Business KPIs 转化率、订单量 -5%
Resource Usage CPU/内存 +30%

In ITSM Context

ITSM 2.0Release-Management中,金丝雀发布是关键实践:

Release Management 2.0
├── Canary Release
│   ├── 渐进式流量转移
│   ├── 实时监控
│   └── 自动回滚
├── Blue-Green Deployment
│   ├── 零停机切换
│   └── 快速回滚
└── Feature Flags
    ├── 精细化控制
    └── A/B Testing

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