Kubernetes management

fred974

Hi,

I just deployed a 2 node kubernetes cluster using the XOA recipe.. I am new to kubernetes and loaded the cluster in view to learn it. Probably a dumb question but what does the kubernetes cluster come with?

debian@master:~$ minikube version
-bash: minikube: command not found
debian@master:~$ kubectl version
-bash: kubectl: command not found
debian@master:~$ kubectl get nodes
-bash: kubectl: command not found

What do I use to manage/administer the cluster? Do I need to install something like minikube or does it come installed with one?

Thank you

BenjiReis

@fred974 you should have kubectl installed.

Do you have access to the cloudinit logs of the master ?

BenjiReis

Update:
I think I reproduce the issue:

E: Failed to fetch http://deb.debian.org/debian/pool/main/g/glib2.0/libglib2.0-bin_2.58.3-2+deb10u1_amd64.deb  404  Not Found [IP: 2a04:4e42:62::644 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
2021-11-04 13:31:54,514 - util.py[WARNING]: Failed to install packages: ['apt-transport-https', 'ca-certificates', 'curl', 'gnupg2', 'software-properties-common']
2021-11-04 13:31:54,515 - cc_package_update_upgrade_install.py[WARNING]: 2 failed with exceptions, re-raising the last one

It seems the recipe can't install curl which is necessary to then install the kubernetes package, i'll look into it.

olivierlambert

This is probably because Debian 10 changed the repo, so we should probably recreate a new template and modify the recipe.

In the meantime, you can manually install what's missing.

fred974

@olivierlambert Thank you both for looking into it. Can you please tell how I can figure out what package is missing?

BenjiReis

@fred974 you can look at https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/

This is what's followed by the recipe.

fred974

@benjireis Thank you

ravenet

For managing your kubernetes, I'd look closely at installing Rancher

fred974

@ravenet said in Kubernetes management:

For managing your kubernetes, I'd look closely at installing Rancher

Thank you. I'll take a look

fred974

@ravenet sorry for the delayed reply. I took a look at Ranger. Can you please tell me where does it need to be install? The xcp-ng recipie create 2x nodes and 1x master. Do I install Ranger on the master or a completly different VM?

Thank you

ravenet

@fred974
The decision on where you install Racher is up to you. You can first try a separate VM with docker, or even test using the beta xcp docker runx piece, then do a basic rancher in docker for testing, but this obviously has some redundancy/resiliency HA limits. if it breaks you end up with no access or failover and loss of data or even ability to manage your kube cluster depending on how you setup docker volumes etc. Is good to test and get familiar. You should technically be installing rancher in kubernetes, but in a dedicated management cluster.

Honestly for home lab, docker is fine, as is tossing it in your kubernetes cluster if already setup, just mind your backups and figure out volumes so you can recover if goes kaboom.

Here's a rancher best practices for you, though obviously meant for large corporate and cloud rollouts.

https://www.suse.com/support/kb/doc/?id=000020105

olivierlambert

We'd love to have a Rancher node driver for XO API Just sayin'

https://rancher.com/docs/rancher/v2.5/en/admin-settings/drivers/node-drivers/

fred974

@ravenet Thank you very much. That link you sent is very usefull

fred974

@olivierlambert said in Kubernetes management:

We'd love to have a Rancher node driver for XO API Just sayin'

https://rancher.com/docs/rancher/v2.5/en/admin-settings/drivers/node-drivers/

I whish I could help.. Maybe one day once I understand the basic of it all