kubeapps-dashboard-ui crash loop on CentOS deployed kubernetes 1.8.5

[kgignatyev-inspur]

kubernetes deployed on AWS with kops, and CentOS image was specified for machines per /~https://github.com/kubernetes/kops/blob/master/docs/images.md

kubectl -n kubeapps logs kubeapps-dashboard-ui-5dc47b8d6d-s4qbk

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nami INFO Initializing nginx
Error executing 'postInstallation': EEXIST: file already exists, symlink '/bitnami/nginx/conf' -> '/opt/bitnami/nginx/conf'

kubectl version
Client Version: version.Info{Major:"1", Minor:"9", GitVersion:"v1.9.0", GitCommit:"925c127ec6b946659ad0fd596fa959be43f0cc05", GitTreeState:"clean", BuildDate:"2017-12-16T03:16:50Z", GoVersion:"go1.9.2", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"8", GitVersion:"v1.8.5", GitCommit:"cce11c6a185279d037023e02ac5249e14daa22bf", GitTreeState:"clean", BuildDate:"2017-12-07T16:05:18Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}

[prydonius]

cc @tompizmor

[ngtuna]

cc/ @sameersbn can you look at this ?

[myspotontheweb]

I was getting this error when running minikube with version 1.9.4 of Kubernetes. Upgrading to 1.9.6 appears to solve the problem.

$ minikube version
minikube version: v0.28.0

$ minikube config view
- vm-driver: kvm2
- kubernetes-version: v1.9.6
- memory: 4096

[prydonius]

@myspotontheweb interesting, thanks! @kgignatyev-inspur could you try upgrading to 1.9?

[kgignatyev-inspur]

v0.27.0 working for me now and I cannot experiment at the moment because in China pulling artifacts like dashboard from google is very difficult

[jiaj12]

k8s 1.11 installed by kubeadm on CentOS 7 , same problem.
Error executing 'postInstallation': EEXIST: file already exists, symlink '/bitnami/nginx/conf' -> '/opt/bitnami/nginx/conf'

I think the problem could result in the problem by bitnami/nginx image doesn't support CentOS 7 with overlayFS enabled.

I guess the solution is either change the overlayFS or change the nginx image.

Still testing

[prydonius]

@jiaj12 ah that might very well be it, I have seen this issue before. You could try switching to aufs. cc @sameersbn

[sameersbn]

@jiaj12 It's been a while since I have tried this setup, but from what I remember RHEL treats OverlayFS as a preview filesystem. The following document https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/7.2_Release_Notes/technology-preview-file_systems.html lists the problems and possible workarounds for using OverlayFS with Docker on RHEL 7.2.

I am not sure if the newer version have fixed this. I found this article re: your use case, but unfortunately it's only accessible to paying RHEL users : https://access.redhat.com/solutions/3156851

[sameersbn]

you may also want to take a look at https://docs.docker.com/storage/storagedriver/overlayfs-driver/ for hints on setting up docker for your setup.

[arapulido]

Kubeapps has changed a lot since this issue was open. I am going to close it now but please, open a new one if you have issues with the newest versions of Kubeapps. Thanks!