Netbird Operator fails with 'envsubst: command not found' error

[mercedesyenzzz]

Problem:

When deploying the Netbird Operator on my Talos Kubernetes cluster, the sidecar container for the apply-nbresource service fails with the following error:

bash: envsubst: command not found

Details:

• This error occurs inside the apply-nbresource sidecar.
• The failure suggests that the container image used for this sidecar does not contain the envsubst binary
• As a result, the operator cannot render templates or complete its tasks as expected.

Steps to Reproduce:

1. Deploy Netbird Operator in a Talos-managed Kubernetes cluster (my Talos cluster is using the following extensions: iscsi-tools, qemu-guest-agent, util-linux-tools)
2. Observe the logs of the apply-nbresource sidecar container.
3. Error appears: bash: envsubst: command not found

Expected Behavior:

• The sidecar container should include envsubst so that startup scripts can run successfully.

Potential Solution:

• Update the container image for the sidecar to include the envsubst binary (for Alpine images, use apk add --no-cache gettext; for Debian-based images, use apt-get install -y gettext-base).
• Alternatively, modify the initialization scripts to avoid using envsubst or use a different templating approach that does not require extra binaries.

Environment:

• Kubernetes: Talos
• Operator: Netbird
• Sidecar: apply-nbresource

Let me know if more details are needed!

[mercedesyenzzz]

Hey,

I investigated a bit more and it turns out that this can be easily fixed by overwriting customKubectlImage: "registry.suse.com/suse/kubectl:latest" in values.yaml.

Would still be good if the default image already comes with all required binaries.

Thanks for this awesome tool btw :)

[HurricanKai]

I also just stumbled over this on talos. The suse/kubectl image did not work for me. I used heyvaldemar/aws-kubectl:latest and that worked perfectly.

Thanks for pointing me in the right direction :)