用于蓝绿色或 A/B 部署的无头服务
Headless service for blue green or A/B deployment
在蓝绿或 A/B 部署的情况下，我们如何使无头服务工作？
当我们进行切换时，服务 ID 会移动，但我们如何让应用程序知道它？
遗憾的是，无法使用 headless service 创建 blue/green 部署。这是因为：
Sometimes you don't need load-balancing and a single Service IP. In this case, you can create what are termed "headless" Services, by explicitly specifying "None" for the cluster IP (.spec.clusterIP).
但是，如果要创建 blue/green 部署，则需要网络流量控制工具在 pods 之间切换。您还可以阅读更多 here:
If working with headless services, traffic splits cannot be retrieved. Linkerd reads service discovery information based off the target IP address, and if that happens to be a pod IP address then it cannot tell which service the pod belongs to.
在蓝绿或 A/B 部署的情况下，我们如何使无头服务工作？
当我们进行切换时，服务 ID 会移动，但我们如何让应用程序知道它？
遗憾的是，无法使用 headless service 创建 blue/green 部署。这是因为：
Sometimes you don't need load-balancing and a single Service IP. In this case, you can create what are termed "headless" Services, by explicitly specifying
"None"for the cluster IP (.spec.clusterIP).
但是，如果要创建 blue/green 部署，则需要网络流量控制工具在 pods 之间切换。您还可以阅读更多 here:
If working with headless services, traffic splits cannot be retrieved. Linkerd reads service discovery information based off the target IP address, and if that happens to be a pod IP address then it cannot tell which service the pod belongs to.