fix: refresh bearer token on each Prometheus query#150
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The previous implementation read the bearer token from the in-memory Kubernetes Configuration singleton, which was set once at server startup. OpenShift tokens expire (typically 12-24h), causing all Prometheus queries to fail with "authentication failed" while other K8s API calls continued working (the K8s client handles refresh internally). New fallback chain: 1. `oc whoami -t` — always returns a fresh token 2. Re-read kubeconfig file — covers non-oc environments 3. In-memory config — kept as last resort 4. ServiceAccount token file — in-cluster 5. Environment variables — manual override Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
olegbet
approved these changes
Jul 2, 2026
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Summary
oc whoami -tas primary token source (always fresh), with kubeconfig re-read as fallbackProblem
_get_k8s_bearer_token()read the token fromConfiguration.get_default_copy()— an in-memory snapshot from MCP server startup. OpenShift tokens expire (12-24h), so after some time all Prometheus/Thanos queries failed while other K8s API calls continued working (the K8s client handles refresh internally, but raw HTTP requests to Prometheus routes used the stale extracted token).Test plan
/mcprestart🤖 Generated with Claude Code