Bug: InstanaAgent/Agent CRD Naming Issue Causes kubectl Commands to Fail

[O7Oghany]

Hello,

I discovered a bug when trying to list or delete InstanaAgent objects using kubectl. The following commands return no objects:

kubectl get InstanaAgent -A
kubectl get InstanaAgents -A
kubectl get agent -A
kubectl get agents -A

The only commands that work are using the full API group or the short name.

kubectl get instanaagent.instana.io
kubectl get ia -A

---

Investigation and Findings

After inspecting the CRD, I found that there is a mismatch between the singular, plural, and kind names in the CRD definition:

spec:
  conversion:
    strategy: None
  group: instana.io
  names:
    categories:
    - monitoring
    - openshift-optional
    kind: InstanaAgent
    listKind: InstanaAgentList
    plural: agents
    shortNames:
    - ia
    singular: agent

This mismatch is likely causing kubectl to fail when using commands like kubectl get instanaagent.

---

Resolution

I updated the CRD to ensure the singular and plural names match the kind. The corrected names section is:

spec:
  conversion:
    strategy: None
  group: instana.io
  names:
    categories:
    - monitoring
    - openshift-optional
    kind: InstanaAgent
    listKind: InstanaAgentList
    plural: instanaagents
    shortNames:
    - ia
    singular: instanaagent

With this change, the commands now work as expected.

kubectl get instanaagent -A
NAMESPACE       NAME            AGE
instana-agent   instana-agent   48m

---

Suggestion

Please update the code in the following file:

https://github.com/instana/instana-agent-operator/blob/main/api/v1/instanaagent_types.go#L147

To:

+kubebuilder:resource:path=instanaagents,singular=instanaagent,shortName=ia,scope=Namespaced,categories=monitoring;openshift-optional