K8s Updater

K8s Updater

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Author: MRZHUH
Version: 0.0.1
Type: tool

Overview

• Operate Kubernetes clusters via a Dify plugin: list resources, get details, update images, update environment variables, and view events
• Uses the Kubernetes Python SDK; credentials come from your uploaded kubeconfig

Workflow

Result

Credentials and TLS Mode

• Required: kubeconfig (base64 content or file path)
• Optional: tlsMode
  • strict: verify CA and hostname (default)
  • skip-hostname: skip hostname verification, still verify CA; useful when connecting via IP but the certificate lacks IP SAN
  • insecure: skip all verifications (for debugging only)
• Kubeconfig supports clusters[].cluster.insecure-skip-tls-verify: true
• Environment fallback: K8S_TLS_MODE=skip-hostname or insecure

Tools and Logic

• List Resources

  • Purpose: list nodes/pods/deployments/statefulsets/daemonsets/services/ingresses
  • Params: resourceType (required, supports short names: no/pod/deploy/sts/ds/svc/ing), namespace (optional)
  • Behavior: probes connectivity via list_namespace(limit=1) and returns concise attributes per item
  • Output: items plus time info

• Get Resource

  • Purpose: get resource details in JSON or YAML
  • Params: resourceType, name (optional), namespace (defaults to default for namespaced kinds; ignored for node), outputFormat (json or yaml, default json)
  • Behavior: when name is empty, list resources; namespaced kinds list within namespace (default default); cluster-scoped kinds (e.g. node) list all
  • Output: object or items, plus time info

• Update Image

  • Purpose: update container images of Deployment/StatefulSet/DaemonSet
  • Params: resourceType, name, namespace (default default), image, tag, container (optional filter)
  • Behavior: computes desired image, builds minimal patch for spec.template.spec.containers, and applies patch_namespaced_*
  • Output: changed and unchanged, plus time info

• Update Environment Variables

  • Purpose: update container env vars of Deployment/StatefulSet/DaemonSet
  • Params: resourceType, name, namespace (default default), envKey, envValue, container (optional)
  • Behavior: builds minimal patch for container env lists and applies patch_namespaced_*
  • Output: changed and unchanged, plus time info

• Get Events

  • Purpose: fetch cluster events
  • Params: namespace (optional), limit (optional)
  • Behavior: uses EventsV1Api, falls back to CoreV1Api when needed
  • Output: events plus time info

Examples

• List all pods: tool List Resources, leave namespace empty, set resourceType=pod
• Get a deployment: tool Get Resource, resourceType=deployment, name=<NAME>, namespace=<NS>, outputFormat=json
• Update image: tool Update Image, resourceType=deployment, name=<NAME>, image=repo/app, tag=v1.2.3
• Update env var: tool Update Environment Variables, resourceType=deployment, name=<NAME>, envKey=LOG_LEVEL, envValue=debug
• View events: tool Get Events, optionally set namespace and limit

Connectivity and Common Issues

• On connect, the plugin probes CoreV1Api.list_namespace(limit=1); failures are typically certificate or network issues
• If you see certificate verify failed: IP address mismatch:
  • Prefer changing kubeconfig server to a hostname that matches the certificate, or add IP SAN to the certificate
  • Or set tlsMode=skip-hostname to keep CA verification while skipping hostname match
  • For temporary debugging, tlsMode=insecure (not recommended for production)