Tag: kubernetes

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base64 encoding Kubernetes Secrets includes newline char when exported as an env variable (if you don’t use -n option with echo)

I’m deploying an app to Kubernetes that references a Kubernetes Secret that is exported as an env var on the pod. I couldn’t work out why I kept getting this error when the pod was starting up:

FATAL: password authentication failed for user "admin"

but if I exec’d into the pod to check the value of the env var, it was the correct value that I expected.

Eventually I did stumble across this clue – ‘printenv’ inside the pod shows:

DB_PASSWORD=[value here]

KUBERNETES_SERVICE_PORT_HTTPS=443
[... other values here]

Between DB_PASSWORD and the next value there’s a blank line, followed by a long list of other env var values, with no other blank lines.

From this question, the issue is how I originally encoded the base64 value with:

echo your-value-here | base64

which is not the same as:

echo -n your-value-here | base64

echo apparently includes a newline by default, so you need to use it as above with the -n option

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k3s nodes showing not ready after initial install and config

‘kubectrl describe nodes’ is showing

reason:NetworkPluginNotReady message:Network plugin returns error: cni plugin not initialized

for each node.

This looks like the same issue as here – I followed the quickstart guide and used the ‘--flannel-backend none' option which looks like I setup a snigle node cluster with no networking…

Following the network docs here, I changed my setup line removing the ‘none’ option and now everything is good:

curl -sfL https://get.k3s.io | INSTALL_K3S_EXEC="server" sh -s - --token [my token]
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