02-ca.sh

cd k8s-specs

git pull

# Only if EKS
export NAME=devops25

# Only if EKS
ASG_NAME=$(aws autoscaling \
    describe-auto-scaling-groups \
    | jq -r ".AutoScalingGroups[] \
    | select(.AutoScalingGroupName \
    | startswith(\"eksctl-$NAME-nodegroup\")) \
    .AutoScalingGroupName")

# Only if EKS
echo $ASG_NAME

# Only if EKS
aws autoscaling \
    create-or-update-tags \
    --tags \
    ResourceId=$ASG_NAME,ResourceType=auto-scaling-group,Key=k8s.io/cluster-autoscaler/enabled,Value=true,PropagateAtLaunch=true \
    ResourceId=$ASG_NAME,ResourceType=auto-scaling-group,Key=kubernetes.io/cluster/$NAME,Value=true,PropagateAtLaunch=true

# Only if EKS
IAM_ROLE=$(aws iam list-roles \
    | jq -r ".Roles[] \
    | select(.RoleName \
    | startswith(\"eksctl-$NAME-nodegroup-0-NodeInstanceRole\")) \
    .RoleName")

# Only if EKS
echo $IAM_ROLE

# Only if EKS
cat scaling/eks-autoscaling-policy.json

# Only if EKS
aws iam put-role-policy \
    --role-name $IAM_ROLE \
    --policy-name $NAME-AutoScaling \
    --policy-document file://scaling/eks-autoscaling-policy.json

# Only if EKS
helm install stable/cluster-autoscaler \
    --name aws-cluster-autoscaler \
    --namespace kube-system \
    --set autoDiscovery.clusterName=$NAME \
    --set awsRegion=$AWS_DEFAULT_REGION \
    --set sslCertPath=/etc/kubernetes/pki/ca.crt \
    --set rbac.create=true

# Only if EKS
kubectl -n kube-system \
    rollout status \
    deployment aws-cluster-autoscaler

kubectl get nodes

cat scaling/go-demo-5-many.yml

kubectl apply \
    -f scaling/go-demo-5-many.yml \
    --record

kubectl -n go-demo-5 get hpa

kubectl -n go-demo-5 get pods

kubectl -n kube-system get cm \
    cluster-autoscaler-status \
    -o yaml

kubectl -n go-demo-5 \
    describe pods \
    -l app=api \
    | grep cluster-autoscaler

kubectl get nodes

kubectl -n go-demo-5 get pods

kubectl apply \
    -f scaling/go-demo-5.yml \
    --record

kubectl -n go-demo-5 get hpa

kubectl -n go-demo-5 rollout status \
    deployment api

kubectl -n go-demo-5 get pods

kubectl get nodes

kubectl -n kube-system \
    get configmap \
    cluster-autoscaler-status \
    -o yaml

kubectl -n kube-system \
    get configmap \
    cluster-autoscaler-status \
    -o yaml

kubectl get nodes

kubectl delete ns go-demo-5