ocp4-install.sh

#!/bin/bash

set -x

## Env
DIR=$(pwd)
INSTALL="0"
CLUSTER_NAME=${1}
REGION=${2}
BASE_DOMAIN=${3}
REPLICAS_CP=${4}
REPLICAS_WORKER=${5}
VPC=${6}
AWS_ID=${7}
AWS_SECRET_KEY=${8}
INSTANCE_TYPE=${9}
USERS=${10}


## Prerequisites
echo "This script install the latest stable version available for OCP..."
echo "Downloading OCP 4 installer if not exists:"

  if [ ! -f ./ocp4-installer.tar.gz ]; then
      wget -O ./ocp4-installer.tar.gz https://mirror.openshift.com/pub/openshift-v4/clients/ocp/stable/openshift-install-linux.tar.gz && tar xvzf ./ocp4-installer.tar.gz
  else
      echo "Installer exists, using ./ocp4-installer.tar.gz. Unpacking..." ; echo " "
      tar xvzf ./ocp4-installer.tar.gz
  fi


if [ ! -f ./install/install-dir-$CLUSTER_NAME/terraform.cluster.tfstate ]; then
    echo "AWS credentials: "; echo " "
    aws configure set region $REGION 

cat << EOF > ~/.aws/credentials
[default]
aws_access_key_id = $AWS_ID
aws_secret_access_key = $AWS_SECRET_KEY
EOF

    cleanup() {
        rm -f ./openshift-install
        rm -f .ssh-keys/myocp*
    }
    
    echo "Generating SSH key pair" ; echo " "
    mkdir -p .ssh-keys
    rm -f .ssh-keys/myocp_$CLUSTER_NAME ; ssh-keygen -t rsa -b 4096 -N '' -f .ssh-keys/myocp_$CLUSTER_NAME
    eval "$(ssh-agent -s)"
    
    ssh-add .ssh-keys/myocp_$CLUSTER_NAME
    ssh-add -L
    
    ## Install config file
    echo "Creating install config file" ; echo " "
    rm -f ./install/install-dir-$CLUSTER_NAME/install-config.yaml && rm -f ./install/install-dir-$CLUSTER_NAME/.openshift_install* ; #./openshift-install create install-config --dir=install-dir-$CLUSTER_NAME
    
    mkdir -p backup && mkdir ./backup/backup-$CLUSTER_NAME/
    mkdir -p install && mkdir ./install/install-dir-$CLUSTER_NAME/

    PULL_SECRET=$(cat ./pullsecret.txt)
    SSH_KEY=$(cat .ssh-keys/myocp_$CLUSTER_NAME.pub)
    
    if [ $VPC != false ]; then
      echo "Existing VPC is $VPC..."
      SUBNET_IDS=$(aws ec2 describe-subnets --filters Name=vpc-id,Values=$VPC  --query 'Subnets[?MapPublicIpOnLaunch==`false`].SubnetId' --output text)
      var=$'subnets:\n'

      for instance in $SUBNET_IDS; do envInstances+=(${instance}); done
      for i in ${envInstances[@]};
      do
	   var+="    "-" "\'$i\'$'\n'
      done

      EXISTING_VPC=$var
      echo "Existing subnets are $EXISTING_VPC"
    else
      EXISTING_VPC=""
      echo "No existing VPC..."
    fi	    

cat << EOF > ./backup/backup-$CLUSTER_NAME/install-config.yaml
apiVersion: v1
baseDomain: $BASE_DOMAIN
compute:
- architecture: amd64
  hyperthreading: Enabled
  name: worker
  platform: #{}
    aws:
     type: $INSTANCE_TYPE #m6i.4xlarge  
  replicas: $REPLICAS_WORKER
controlPlane:
  architecture: amd64
  hyperthreading: Enabled
  name: master
  platform: #{}
    aws:
     type: $INSTANCE_TYPE #m6i.4xlarge    
  replicas: $REPLICAS_CP
metadata:
  creationTimestamp: null
  name: $CLUSTER_NAME
networking:
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  machineNetwork:
  - cidr: 10.0.0.0/16
  networkType: OVNKubernetes
  serviceNetwork:
  - 172.30.0.0/16
platform:
  aws:
    region: $REGION
    $EXISTING_VPC
pullSecret: '$PULL_SECRET'
sshKey: $SSH_KEY
EOF

    cp ./backup/backup-$CLUSTER_NAME/install-config.yaml ./install/install-dir-$CLUSTER_NAME/install-config.yaml
    cat ./install/install-dir-$CLUSTER_NAME/install-config.yaml

    echo "Edit the installation file ./install/install-dir-$CLUSTER_NAME/install-config.yaml if you need."
    echo "Confirm when you are ready:" ; echo " "
    
    while true; do
        read -p "Proceed with OCP cluster installation: yY|nN -> " yn
        case $yn in
                [Yy]* ) echo "Installing OCP4 cluster... " ; INSTALL="1" ; break;;
                [Nn]* ) echo "Aborting installation..." ; cleanup ; ssh-add -D ; exit;;
                * ) echo "Select yes or no";;
        esac
    done
    
    if [ $INSTALL -gt 0 ]; then
    ./openshift-install create cluster --dir=install/install-dir-$CLUSTER_NAME --log-level=info
    echo "Set HTPasswd as Identity Provider" ; echo " "
    ./oauth.sh $CLUSTER_NAME $VPC $USERS
    ssh-add -D
    fi
else
    echo "An OCP cluster exists. Skipping installation..."
    echo "Remove the install-dir folder and run the script."
fi

exit