Kubernetes Intro – HackMD

# Kubernetes Intro

– Local Google cloud setup
– Tools

—

#### Setup

– Install google SDK:
cloud.google.com/sdk/docs/install
region -> (europe-west4-a)

– Install kubectl:
kubernetes.io/docs/tasks/tools/

—

– List available clusters in our account

“`
gcloud container clusters list
“`

– List our available contexts

“`
kubectl config get-contexts
“`

– Add one cluster to our available contexts

“`
gcloud container clusters get-credentials acceptance
“`

—

– Change context
“`
kubectl config use-context acceptance
“`

– List contexts
“`
kubectl config get-contexts -o=name
“`

– Tool to fancy navigate through contexts:
github.com/ahmetb/kubectx#kubectl-plugins-macos-and-linux

—

#### Namespace

– List namespaces
“`
kubectl get namespaces
“`

– Change namespace
“`
kubectl config set-context –current –namespace=equalture-8828728
“`

—

– Fancy namespaces navigation
“`
kubens
“`

“`
(I think it is installed with kubectx)
“`

—

—
#### kube-ps1

Allows to easily know in which cluster and namespace you are
“`
github.com/jonmosco/kube-ps1
“`

—

#### Basic steps

“`
kubectl get pods
“`

“`
kubectl get services
“`

“`
kubectl get cronjobs
“`

—-

#### Check logs

“`
kubectl get pods
“`

“`
kubectl logs <pod-name>
“`

“`
kubectl logs -f <pod-name>
“`

—

#### k9s

“`
github.com/derailed/k9s
“`


—

#### Check secrets

– All secrets file for current
“`
kubectl get secrets
“`

– Applying base64 decoding
“`
kubectl get secrets jerry-google-cloud-credentials -o json | jq ‘.data | map_values(@base64d)’
“`

– Edit secrets:

“`
kubectl edit secrets jerry-google-cloud-credentials
“`

—

#### Cluster debugging

“`
kubectl get events
“`

—

# End