Fail when join node to master! about ansible-role-kubernetes HOT 8 CLOSED

@pmav99 - yeah, in the case of swap I usually use geerlingguy.swap to configure it and don't want this role to manage that aspect as well.

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I have not had this issue, but I'm always running the playbook against at least the master (which is where the command comes from) and one node.

This role currently doesn't work that well if you're running it against individual hosts and not also the master, for the issue you've mentioned in the OP.

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Same problem here. Any ideas ?

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I figured it out.

I was running one playbook per server, which couldn't work because this role must be run on all the servers in just ONE TIME. Reason why is that I was using Terraform and running Ansible with https://github.com/radekg/terraform-provisioner-ansible.

from ansible-role-kubernetes.

I get the same error, even though I run a single playbook on all the hosts.

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OK I think I figured this out.

The VM template I was using had a swapfile. As a result kubelet was constantly restarting because I had not added "--fail-swap-on=false" and consequently #28 was triggered. Due to the silent failure, the play moved on but then kubernetes_join_command was never being defined (or perhaps more accurately, kubeadm token create never wrote anything to stdout; I haven't tested this though).

Perhaps it would be a good idea to add an explicit check for swap but then again you might want to keep this more lightweight.

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Thank you @geerlingguy
I agree that a kubernetes role should definitely not configure swap. That being said, explicitly checking if /proc/swaps has any entries might still make sense

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For now I'll leave it as is. The kubelet output should always be consulted in the case of a failure to initialize or join nodes, as it usually has the answer pretty clearly logged somewhere (journalctl -xue kubelet).

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