not a valid label name when relabeling Kubernetes node labels

[mosh...@gmail.com]

Hi,

When I try to relabel Kubernetes  node label like beta.kubernetes.io/os I get "is not a valid label name" error.

Is there any way to workaround this?

Thanks!

Moshe

[Julius Volz]

If you are talking about the "__meta_kubernetes_node_label_<labelname>" labels: Prometheus does not support dots or underscores in label names, so they get converted to underscores. Like "beta_kubernetes_io_os".

I just noticed that we do not mention this conversion anywhere on https://prometheus.io/docs/operating/configuration/#<kubernetes_sd_config> - something we should fix.

I filed https://github.com/prometheus/docs/issues/735.

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[Moshe Nadler]

Hi,

You are correct. Replacing beta.kubernetes.io/instance-type with beta_kubernetes_io_instance_type did the trick. 

So the configuration:

 relabel_configs:

      - source_labels: [__meta_kubernetes_node_label_beta_kubernetes_io_instance_type]

        target_label: kubernetes_instance_type

is working.

Thanks!

Moshe

On Tue, May 9, 2017 at 5:48 PM Julius Volz <juliu...@gmail.com> wrote:

If you are talking about the "__meta_kubernetes_node_label_<labelname>" labels: Prometheus does not support dots or underscores in label names, so they get converted to underscores. Like "beta_kubernetes_io_os".

I just noticed that we do not mention this conversion anywhere on https://prometheus.io/docs/operating/configuration/#<kubernetes_sd_config> - something we should fix.

I filed https://github.com/prometheus/docs/issues/735.

On Tue, May 9, 2017 at 3:57 PM, <mosh...@gmail.com> wrote:

Hi,

When I try to relabel Kubernetes  node label like beta.kubernetes.io/os I get "is not a valid label name" error.

Is there any way to workaround this?

Thanks!

Moshe

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