kops

create R53 zone

ID=$(uuidgen) && aws route53 create-hosted-zone --name bitcorn.site --caller-reference $ID | jq .DelegationSet.NameServers

create S3 bucket

export KSS=s3://kube-io-234212
aws s3 mb s3://kube-io-234212

upload local publiic key to cluster nodes

kops create secret --name bitcorn.site sshpublickey admin -i ~/.ssh/id_rsa.pub --state s3://kube-io-234212

Create cluster on aws

kops create cluster --name  c1.bitcorn.site --zones us-east-2b --state s3://kube-io-234212 --yes --dns-zone bitcorn.site --node-count 2 --node-size t2.micro --master-size t2.micro --yes
kops update cluster bitcorn.site  --state s3://kube-io-234212 --yes

Update Kube Cluster config

kops edit cluster c1.bitcorn.site --state ${KSS}
kops update cluster c1.bitcorn.site --state ${KSS} --yes

Update Kube nodes config

 kops edit ig nodes --state ${KSS}

Delete cluster

 kops delete cluster  --state s3://kube-io-234212 --name  c1.bitcorn.site

Get cluster

 kops get cluster --state ${KSS}

kubectl

Test run an image on cluster

kubectl create deployment test-kube --image  k8s.gcr.io/echoserver:1.4
kubectl run test-kube --image k8s.gcr.io/echoserver:1.4 --port 8080

Expose or nat the container port randomly

kubectl expose deployment test-kube --type=NodePort --port 8080
kubectl expose pod test-kube --type=NodePort --port 8080

Manual port forward optional

kubectl port-forward <pod> 8080

permanently save the namespace for all subsequent kubectl commands in that context

kubectl config set-context --current --namespace=[namespace]

Shell to container

kubectl exec -it shell-demo -- /bin/bash

Node label

use nodeSelector in deployment.yml

Health check

livenessProbes: check whether container is running, if not restart
readiness: check if pod is ready to serve request, if not remove pod IP from service

get log of running start up command in container

kubectl logs -p [pod name]

gcloud

Cluster setup

export PROJECT_ID=`gcloud config get-value project` && \
export M_TYPE=n1-standard-2 && \
export ZONE=us-central-a && \
export CLUSTER_NAME=${PROJECT_ID}-${RANDOM} && \
gcloud services enable container.googleapis.com && \
gcloud container clusters create $CLUSTER_NAME \
--cluster-version latest \
--machine-type=$M_TYPE \
--num-nodes 4 \
--zone $ZONE \
--project $PROJECT_ID \
--enable-autoscaling --min-nodes 1 --max-nodes 4 \
--enable-master-authorized-networks --master-authorized-networks [authorized cidr]

login

gcloud auth login

set up project

gcloud projects list
gcloud config set project $GCP_PROJECT_ID
gcloud config set compute/zone us-central1-a

Generate kubectl credential for local

gcloud container clusters list
gcloud container clusters get-credentials cluster-name

Create Persistent compute disk

gcloud compute disks create --type=pd-standard --size=1GB [name]

Create GKE cluster

gcloud container clusters create cluster-1 --num-nodes 4 --machine-type e2-medium  \
--node-locations  us-central1-f --enable-autoscaling --min-nodes 1 \
--max-nodes 4 --region us-central1-f --enable-master-authorized-networks \
--cluster-version 1.16.13-gke.400 \
--master-authorized-networks [IP]/32

Update authorized master network

gcloud container clusters update example-cluster \
--enable-master-authorized-networks \
--master-authorized-networks [IP/32 comma separated]

List node pool in cluster

gcloud container node-pools list --cluster snappass-cluster

Resize node pool

gcloud container clusters resize snappass-cluster --node-pool default-pool --num-nodes

Create docker image w gcloud

gcloud builds submit --tag us.gcr.io/$GCP_PROJECT_ID/snappass-nginx:$SNAPPASS_NGINX_GIT_SHA .
gcloud container images list --repository us.gcr.io/$GCP_PROJECT_ID

docker

Build local docker image

docker build --tag snappass:1.0 .

Run container for local built image

docker run --publish 5000:5000 -e REDIS_HOST='192.168.1.75' snappass:1.0

Push image to gcr

gcloud auth configure-docker
docker tag 016bc1f182f5  us.gcr.io/kuber-276115/docker-jenkin-slave:1.0
docker push us.gcr.io/kuber-276115/docker-jenkin-slave

helm

add helm repo

helm repo add stable https://kubernetes-charts.storage.googleapis.com/

Get helm charts

helm ls --all

Deploy helm chart

Update helm chart

helm upgrade hello-world ./hello-world
helm rollback hello-world 1
helm delete --purge hello-world
helm package ./hello-world

install nginx-ingress

hell install nginx-ingress stable/nginx-ingress

get yaml output for helm deployment

helm template nginx-ingress stable/nginx-ingress --set rbac.create=true --set controller.publishService.enabled=true