kops

Kubernetes Operations

installation

install kubectl

1. curl -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl`
2. chmod +x ./kubectl
3. sudo mv ./kubectl /usr/local/bin/kubectl`
4. kubectl version --client

install kops

curl -LO https://github.com/kubernetes/kops/releases/download/$(curl -s https://api.github.com/repos/kubernetes/kops/releases/latest | grep tag_name | cut -d '"' -f 4)/kops-linux-amd64
chmod +x kops-linux-amd64
sudo mv kops-linux-amd64 /usr/local/bin/kops

execution

Exporting KOPS_STATE_STORE is must before running any of below commands.

export KOPS_STATE_STORE="s3://INSERT S3 BUCKET HERE"

kops create cluster yaml file

kops create cluster --name=mycluster.tyagi.k8.net \
--state=s3://tyagi.k8.net \
--dns-zone=tyagi.k8.net --dns private --zones us-east-1a \
--vpc=vpc-dae5a0a0 --subnets=subnet-e11f28cf \
--networking=calico \
--node-size=t3.large --node-count=2 --master-size=m4.large --master-count=1 \
--dry-run \
-oyaml > myk8cluster.yaml

kops create cluster

export KOPS_STATE_STORE="s3://INSERT S3 BUCKET HERE"

1. kops create -f <filename.yml>
2. kops update cluster <cluster_name> --yes`

kops update cluster

export KOPS_STATE_STORE="s3://INSERT S3 BUCKET HERE"

1. kops replace -f <filename.yml>
2. kops update cluster <cluster_name> --yes

kops rolling-upgrade cluster

Rolling upgrade one of the use case is vertically scale-in/out "change in ec2 type"

1. kops replace -f <filename.yml>
2. kops rolling-update cluster <cluser_name> --yes
or
kops rolling-update cluster <cluster_name>  --yes --fail-on-validate-error="false" -node-interval 8m --instance-group nodes