What is Ingress

Ingress.

Enabling traffic.

• Openning the cluster to receive external traffic.

Traffic routing

• Defining the traffic routes to backend services.

Traffic Reliability

• Ensure Reliable, Secure communication.

kubectl troubleshooting commands

Most useful commands while troubleshoot kubernetes.

Namespace

kubectl get ns
kubectl get namespaces
kubectl get namespace

Pods

kubectl get pods --all-namespaces
kubectl get pods -n [namespace-name]
kubectl describe pod [pod-name] -n [namespace-name]
kubectl get pod [pod-name] -o yaml
kubectl describe pod [pod-name]
kubectl exec [pod-name] -it sh

View Pod logs

kubectl logs -f -c [container-name] [pod-name] -n [namespace-name]
kubectl logs [pod-name]
kubectl logs [pod-name] -c [container-Name]
kubectl logs -p [pod-name]
kubectl logs -f [pod-name]

Additional Information

#List all Container images in namespace
kubectl get pods -n [namespace-name] -o jsonpath="{.items[*].spec.containers[*].image}"

kubectl help

C:\>kubectl help
kubectl controls the Kubernetes cluster manager.

 Find more information at: https://kubernetes.io/docs/reference/kubectl/overview/

Basic Commands (Beginner):
  create         Create a resource from a file or from stdin.
  expose         Take a replication controller, service, deployment or pod and expose it as a new
Kubernetes Service
  run            Run a particular image on the cluster
  set            Set specific features on objects

Basic Commands (Intermediate):
  explain        Documentation of resources
  get            Display one or many resources
  edit           Edit a resource on the server
  delete         Delete resources by filenames, stdin, resources and names, or by resources and
label selector

Deploy Commands:
  rollout        Manage the rollout of a resource
  scale          Set a new size for a Deployment, ReplicaSet, Replication Controller, or Job
  autoscale      Auto-scale a Deployment, ReplicaSet, or ReplicationController

Cluster Management Commands:
  certificate    Modify certificate resources.
  cluster-info   Display cluster info
  top            Display Resource (CPU/Memory/Storage) usage.
  cordon         Mark node as unschedulable
  uncordon       Mark node as schedulable
  drain          Drain node in preparation for maintenance
  taint          Update the taints on one or more nodes

Troubleshooting and Debugging Commands:
  describe       Show details of a specific resource or group of resources
  logs           Print the logs for a container in a pod
  attach         Attach to a running container
  exec           Execute a command in a container
  port-forward   Forward one or more local ports to a pod
  proxy          Run a proxy to the Kubernetes API server
  cp             Copy files and directories to and from containers.
  auth           Inspect authorization

Advanced Commands:
  diff           Diff live version against would-be applied version
  apply          Apply a configuration to a resource by filename or stdin
  patch          Update field(s) of a resource using strategic merge patch
  replace        Replace a resource by filename or stdin
  wait           Experimental: Wait for a specific condition on one or many resources.
  convert        Convert config files between different API versions
  kustomize      Build a kustomization target from a directory or a remote url.

Settings Commands:
  label          Update the labels on a resource
  annotate       Update the annotations on a resource
  completion     Output shell completion code for the specified shell (bash or zsh)

Other Commands:
  api-resources  Print the supported API resources on the server
  api-versions   Print the supported API versions on the server, in the form of "group/version"
  config         Modify kubeconfig files
  plugin         Provides utilities for interacting with plugins.
  version        Print the client and server version information

Usage:
  kubectl [flags] [options]

Use "kubectl  --help" for more information about a given command.
Use "kubectl options" for a list of global command-line options (applies to all commands).

Reference

• Documentation: K8s Logs command