前言

個人在使用 kubectl port-forward 來透過個人本機連線至叢集內的 Service 時，發現應用本身有很嚴重的延遲，並且終端出現很多如下的報錯：

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E0727 04:43:17.308460   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
Handling connection for 3000
E0727 04:43:24.054587   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
E0727 04:43:27.345265   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
Handling connection for 3000
Handling connection for 3000
E0727 04:43:37.306154   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
E0727 04:43:37.383904   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
Handling connection for 3000
E0727 04:43:41.308084   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
E0727 04:43:42.641875   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
E0727 04:43:42.986275   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
Handling connection for 3000
E0727 04:43:44.239246   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
E0727 04:43:47.416765   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
Handling connection for 3000
E0727 04:43:57.452707   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
Handling connection for 3000
E0727 04:43:59.748437   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
E0727 04:44:07.487353   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
Handling connection for 3000
Handling connection for 3000
E0727 04:44:12.987901   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
Handling connection for 3000
E0727 04:44:17.522404   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
Handling connection for 3000
Handling connection for 3000
E0727 04:44:27.558770   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
Handling connection for 3000
Handling connection for 3000
E0727 04:44:37.593397   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
Handling connection for 3000
E0727 04:44:39.102161   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred
E0727 04:44:42.992369   41404 portforward.go:347] error creating error stream for port 3000 -> 3000: Timeout occurred

作法

後續將 kubectl 的版本替換成與 Kubernetes 相同的版本後，可以順利的訪問應用且終端沒有再出現報錯。