Support renewing the Harvester cloud credential's kubeconfig token in k8s module - #275
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📝 WalkthroughWalkthroughThe module adds an explicit Harvester credential rotation variable. A ChangesHarvester credential rotation
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟠 High · up to This change renews the credential token in place, but the current implementation may expose that token in Terraform plans and may use the wrong namespace or service account for customized cloud-provider credentials. These are concrete security and correctness risks that should be fixed before merging. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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In `@modules/tenancy/k8s-cluster/main.tf`:
- Line 383: Update the terraform_data usage around kubeconfig_content so the
sensitive marking of data.rancher2_cluster_v2.harvester[0].kube_config is
preserved and its token cannot appear in plans. Use a sensitivity-preserving
alternative compatible with the module’s supported Terraform version, or raise
the minimum Terraform version before using store.sensitive_output.
- Line 383: Update the cache input to use the dedicated cloud-provider
ServiceAccount kubeconfig scoped by harvester_vm_namespace and
harvester_service_account_name, rather than
data.rancher2_cluster_v2.harvester[0].kube_config; preserve this scoped
kubeconfig for both creation and rotation.
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modules/tenancy/k8s-cluster/main.tfmodules/tenancy/k8s-cluster/variables.tf
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…to preserve sensitivity The prior implementation buffered the Harvester kubeconfig token through terraform_data's legacy input/output attributes, which do not preserve Terraform's sensitivity mark — the token could render in plain text in plan/apply output. It also considered forcing a full credential replace to trigger renewal, which would cascade into rancher2_cluster_v2.this's machine_pools cloud_credential_secret_name. Switch to terraform_data's store.sensitive_output block (Terraform >= 1.16), gated by store.version = var.harvester_credential_rotation, so the token: - only refreshes when the rotation counter is bumped (no per-apply drift) - keeps its sensitive mark end to end (never rendered in plain text) - updates the existing credential in place (same secret ID, no cluster or machine_pool cascade) Bumps the module's required_version to >= 1.16 accordingly.
2 participants
Summary
rancher2_cloud_credential.harvester'skubeconfig_content, but that field was permanentlyignore_changes'd — once created,Terraform could never renew it, forcing manual UI edits (and Rancher's own "Renew" button
is unreliable in some versions).
harvester_credential_rotationvariable (number, default0). Bumping it forces abrand-new kubeconfig to be fetched from Rancher — the same dynamic API path used on initial
creation — and applied to the existing credential in place. No manual kubeconfig content is
ever required.
terraform_data.harvester_kubeconfig_rotationresource pins the livedata.rancher2_cluster_v2.harvester[0].kube_configvalue across applies(
ignore_changes = [input], avoiding drift since Rancher mints a new token on everyrefresh) and only recomputes it when
triggers_replace = [var.harvester_credential_rotation]fires. The cloud credential resource now reads
kubeconfig_contentfrom that pinned value,so a rotation updates the credential in place — same secret ID, no cluster or
machine-pool disruption.
Usage
Bump
harvester_credential_rotationin the calling module andterraform applyto renew:Summary by CodeRabbit