Port-forwarding not working in containerized hyperkube due to missing socat command

[2opremio]

When trying to use kubectl port-forward against a containerized kubernetes cluster (i.e. deployed following https://github.com/kubernetes/kubernetes/blob/master/docs/getting-started-guides/docker.md ) I get the following errors:

$ kubectl port-forward fons-proxy-ksts5 8000:8000 8080:8080
I1112 12:23:59.888110   53302 portforward.go:213] Forwarding from 127.0.0.1:8000 -> 8000
I1112 12:23:59.888315   53302 portforward.go:213] Forwarding from [::1]:8000 -> 8000
I1112 12:23:59.888365   53302 portforward.go:213] Forwarding from 127.0.0.1:8080 -> 8080
I1112 12:23:59.888423   53302 portforward.go:213] Forwarding from [::1]:8080 -> 8080
I1112 12:24:13.166791   53302 portforward.go:247] Handling connection for 8000
I1112 12:24:13.168963   53302 portforward.go:247] Handling connection for 8000
I1112 12:24:13.171131   53302 portforward.go:247] Handling connection for 8000
I1112 12:24:13.171192   53302 portforward.go:247] Handling connection for 8000
I1112 12:24:13.171193   53302 portforward.go:247] Handling connection for 8000
I1112 12:24:13.171888   53302 portforward.go:247] Handling connection for 8000
E1112 12:24:13.233818   53302 portforward.go:318] an error occurred forwarding 8000 -> 8000: error forwarding port 8000 to pod fons-proxy-ksts5_default, uid : unable to do port forwarding: socat not found.
E1112 12:24:13.236034   53302 portforward.go:318] an error occurred forwarding 8000 -> 8000: error forwarding port 8000 to pod fons-proxy-ksts5_default, uid : unable to do port forwarding: socat not found.
E1112 12:24:13.236272   53302 portforward.go:318] an error occurred forwarding 8000 -> 8000: error forwarding port 8000 to pod fons-proxy-ksts5_default, uid : unable to do port forwarding: socat not found.
E1112 12:24:13.236404   53302 portforward.go:318] an error occurred forwarding 8000 -> 8000: error forwarding port 8000 to pod fons-proxy-ksts5_default, uid : unable to do port forwarding: socat not found.
E1112 12:24:13.236489   53302 portforward.go:318] an error occurred forwarding 8000 -> 8000: error forwarding port 8000 to pod fons-proxy-ksts5_default, uid : unable to do port forwarding: socat not found.
E1112 12:24:13.236528   53302 portforward.go:318] an error occurred forwarding 8000 -> 8000: error forwarding port 8000 to pod fons-proxy-ksts5_default, uid : unable to do port forwarding: socat not found.
I1112 12:24:13.321342   53302 portforward.go:247] Handling connection for 8000
E1112 12:24:43.322896   53302 portforward.go:258] error creating error stream for port 8000 -> 8000: Timeout occured

This is simply because the socat command is missing in the hyperkube container image. I will be creating a PR with a fix shortly.

[mayukh1]

mayukh@mayukh-Inspiron-3521:/istio-1.6.0$ istioctl manifest apply --set profile=demo
Detected that your cluster does not support third party JWT authentication. Falling back to less secure first party JWT. See https://istio.io/docs/ops/best-practices/security/#configure-third-party-service-account-tokens for details.
✔ Istio core installed
✔ Istiod installed
✔ Egress gateways installed
✔ Ingress gateways installed
✔ Addons installed
✔ Installation complete mayukh@mayukh-Inspiron-3521:/istio-1.6.0$ istio version
istio: command not found
mayukh@mayukh-Inspiron-3521:/istio-1.6.0$ kubectl -n istio-system get svc prometheus
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
prometheus ClusterIP 10.101.216.106 9090/TCP 20m
mayukh@mayukh-Inspiron-3521:/istio-1.6.0$ kubectl -n istio-system get svc grafana
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
grafana ClusterIP 10.97.41.187 3000/TCP 21m
mayukh@mayukh-Inspiron-3521:/istio-1.6.0$ kubectl -n istio-system port-forward $(kubectl -n istio-system get pod -l app=grafana -o jsonpath='{.items[0].metadata.name}') 3000:3000 &
[1] 12167
mayukh@mayukh-Inspiron-3521:/istio-1.6.0$ Forwarding from 127.0.0.1:3000 -> 3000
Forwarding from [::1]:3000 -> 3000
Handling connection for 3000
Handling connection for 3000
E0601 00:12:20.831407 12167 portforward.go:400] an error occurred forwarding 3000 -> 3000: error forwarding port 3000 to pod 6277818d8d58b0b6d52d07c776f1e930860a60466790efbaf9460a380ea497ad, uid : unable to do port forwarding: socat not found
E0601 00:12:20.832330 12167 portforward.go:400] an error occurred forwarding 3000 -> 3000: error forwarding port 3000 to pod 6277818d8d58b0b6d52d07c776f1e930860a60466790efbaf9460a380ea497ad, uid : unable to do port forwarding: socat not found
Handling connection for 3000
E0601 00:12:20.836785 12167 portforward.go:400] an error occurred forwarding 3000 -> 3000: error forwarding port 3000 to pod 6277818d8d58b0b6d52d07c776f1e930860a60466790efbaf9460a380ea497ad, uid : unable to do port forwarding: socat not found
Handling connection for 3000
Handling connection for 3000