by swinging traffic back 2. Database changes a. Create two DB – put one in read only mode, backup & restore to new environment, swing traffic b. Decouple DB changes from application changes i. Make

"/git-data" } }) #设置备份存放路径及备份默认保存时间，默认 /var/opt/gitlab/backups/ gitlab_rails['backup_path'] = "/git-backup" gitlab_rails['backup_keep_�me'] = 604800 #设置时区 gitlab_rails['�me_zone'] = "Asia/Shanghai" #设置监听的端口号（h�ps的端口号） nginx['ssl_cer�ficate_key'] = "/etc/gitlab/gitlab.cof-lee.com.key" EOF # mkdir /git-data # mkdir /git-backup #将证书及密钥文件复制到/etc/gitlab目录下 # gitlab-ctl reconfigure #重加载配置文件（耗时较长，约5到10分钟）

availability 8. Startups & shutdowns 9. Faults & errors 10. Circuit breaker trips 11. Delays 12. Backup success/failure d. USE TELEMETRY TO GUIDE PROBLEM-SOLVING i. Don’t practice “Mean Time until Declared

faster) iii. Production deployments (sixty times higher change success rate) iv. Mean time to restore service (168 times faster) 4. An Introduction to The DevOps Handbook xxi 5. PART I—THE THREE WAYS