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kklin opened this issue Dec 25, 2018 · 11 comments
Closed

Doesn't work on GKE #2

kklin opened this issue Dec 25, 2018 · 11 comments

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@kklin
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kklin commented Dec 25, 2018

I got this error when trying this against a GKE cluster:

2018/12/24 17:46:28 error loading file  open /Users/kevin/.kube/debug-config: no such file or directory
No Auth Provider found for name "gcp"
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x1b459b8]

goroutine 1 [running]:
github.com/aylei/kubectl-debug/pkg/plugin.(*DebugOptions).Run(0xc4202621c0, 0x0, 0x0)
        /Users/alei/go/src/github.com/aylei/kubectl-debug/pkg/plugin/cmd.go:193 +0x48
github.com/aylei/kubectl-debug/pkg/plugin.NewDebugCmd.func1(0xc420295180, 0xc420322bd0, 0x1, 0x3)
        /Users/alei/go/src/github.com/aylei/kubectl-debug/pkg/plugin/cmd.go:94 +0x134
github.com/aylei/kubectl-debug/vendor/github.com/spf13/cobra.(*Command).execute(0xc420295180, 0xc4200d60d0, 0x3, 0x3, 0xc420295180, 0xc4200d60d0)
        /Users/alei/go/src/github.com/aylei/kubectl-debug/vendor/github.com/spf13/cobra/command.go:766 +0x2c1
github.com/aylei/kubectl-debug/vendor/github.com/spf13/cobra.(*Command).ExecuteC(0xc420295180, 0x1e5edf0, 0x1bed6c0, 0x1e5af50)
        /Users/alei/go/src/github.com/aylei/kubectl-debug/vendor/github.com/spf13/cobra/command.go:852 +0x30a
github.com/aylei/kubectl-debug/vendor/github.com/spf13/cobra.(*Command).Execute(0xc420295180, 0xc4200dc000, 0x1e64980)
        /Users/alei/go/src/github.com/aylei/kubectl-debug/vendor/github.com/spf13/cobra/command.go:800 +0x2b
main.main()
        /Users/alei/go/src/github.com/aylei/kubectl-debug/cmd/plugin/main.go:16 +0x112

I've seen this in my own projects before. It'll probably be fixed by importing the auth plugins: kubernetes/client-go#242 (comment).
@aylei
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aylei commented Dec 25, 2018

@kklin Thanks! I'll take a look later today and test it upon GKE.

@aylei
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aylei commented Dec 25, 2018

@kklin Or would you like to send a PR if importing the auth plugins works for you?

@kklin
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kklin commented Dec 25, 2018

Sure. I took a quick look: adding the auth plugins fixed the error with parsing the kubeconfig, but it still doesn't work with GKE because the hostIP of the DaemonSet pods are private:

kevin@Kevins-MacBook-Pro-2 kubectl-debug % kubectl debug tiller-deploy-6d95c79967-bqxxc -n kube-system
2018/12/24 21:18:20 error loading file  open /Users/kevin/.kube/debug-config: no such file or directory
error execute remote, error sending request: Post http://10.128.0.4:10027/api/v1/debug?command=%5B%22bash%22%5D&container=docker%3A%2F%2Fac7e6b66f589204696db611077d6bc4d1d71d0f89835ef555d4b3778b2721728&image=nicolaka%2Fnetshoot%3Alatest: dial tcp 10.128.0.4:10027: connect: operation timed out
error sending request: Post http://10.128.0.4:10027/api/v1/debug?command=%5B%22bash%22%5D&container=docker%3A%2F%2Fac7e6b66f589204696db611077d6bc4d1d71d0f89835ef555d4b3778b2721728&image=nicolaka%2Fnetshoot%3Alatest: dial tcp 10.128.0.4:10027: connect: operation timed out

kevin@Kevins-MacBook-Pro-2 kubectl-debug % kubectl get pod debug-agent-c2shn -o yaml
  ...

  hostIP: 10.128.0.4
  phase: Running
  podIP: 10.128.0.4
  qosClass: Burstable
  startTime: 2018-12-25T01:46:05Z

I would PR the auth plugin fix, but I couldn't figure out the right way to update Gopkg.toml.

@aylei
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aylei commented Dec 25, 2018 •
edited
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Adding the import statement and run dep ensure locally will do the work.

the hostIP of the DaemonSet pods are private

I need to do some investigation about this problem (solution to access the hostIP&hostPort in GKE from client).
But generally, the hostIP & hostPort is not always available (or say, typically not available if cluster is set up with security consideration), so I plan to add an extend apiserver acting as the gateway. I will track this in another issue.
Thank you so much for your information, again😁

@aylei aylei mentioned this issue Dec 25, 2018
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@aylei
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aylei commented Dec 27, 2018

@kklin Hi, anything blocking? How can I help?

kklin added a commit to kklin/kubectl-debug that referenced this issue Dec 27, 2018
@kklin
Support client auth providers
217477a 
Kubectl clients connect to GKE using the GCP auth provider. Before, the
kubectl-debug plugin would panic because it couldn't find the GCP auth
provider -- this commit adds support for all auth providers defined by
client-go.

Fixes aylei#2.
@kklin kklin mentioned this issue Dec 27, 2018
Merged
@aylei aylei closed this as completed in #5 Dec 28, 2018
aylei pushed a commit that referenced this issue Dec 28, 2018
@kklin @aylei
Support client auth providers (#5)
59c19db 
Kubectl clients connect to GKE using the GCP auth provider. Before, the
kubectl-debug plugin would panic because it couldn't find the GCP auth
provider -- this commit adds support for all auth providers defined by
client-go.

Fixes #2.
@gadiener
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Hello @aylei,
thanks for this nice project, I keep seeing this issue:

No Auth Provider found for name "gcp"

I see that the issue is closed but I have not found any work around. How did you solve?

Thanks

@aylei
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aylei commented Mar 13, 2019

@gadiener
Which version are you using?

@gadiener
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@aylei this one
https://github.com/aylei/kubectl-debug/releases/download/0.0.1/kubectl-debug_0.0.1_macos-amd64

@aylei
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aylei commented Mar 14, 2019

@gadiener
Would you like to try out the 0.0.2 release, auth problem got fixed in this version.

@gadiener
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Thanks @aylei,

I sent you a pull request to update the README.md with the link of the new release.

#24

@deeTEEcee
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Following the binary instructions for mac installation on the README, I get an issue with tar file: tar: Error opening archive: Unrecognized archive format

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@deeTEEcee @kklin @gadiener @aylei