#!/bin/bash

set -e
set -v

# this paste contains the commands run during the "setup GitLab in GKE" video at https://www.youtube.com/watch?v=8vM374-H0zE
# additional information can be found at https://docs.gitlab.com/ee/install/kubernetes/gitlab_chart.html

# once configured, you will be able to access your cluster at
# https://gitlab.$CLUSTERNAME.$DOMAINNAME

# PROJECTNAME should be your GKE project
# DNSZONE is the name of the zone configuration in Google Cloud DNS

export CLUSTERNAME=your-cluster-name
export PROJECTNAME=your-gke-project
export DNSZONE=your-gcloud-dns-zone
export DOMAINNAME=your-domain-name.com

# create cluster
gcloud container clusters create $CLUSTERNAME --machine-type "n1-standard-2" --num-nodes "3" --zone "europe-west1-b"

# create static ip
gcloud beta compute --project=$PROJECTNAME addresses create $CLUSTERNAME --region=europe-west1 --network-tier=PREMIUM

# switch to admin
export ADMINPASS=`gcloud container clusters describe $CLUSTERNAME |grep password: |cut -d ":" -f 2|sed 's/ //'`
kubectl config set-credentials admin/$CLUSTERNAME --username=admin --password=$ADMINPASS
kubectl config set-context gke_${PROJECTNAME}_europe-west1-b_$CLUSTERNAME --user=admin/$CLUSTERNAME
kubectl config use-context gke_${PROJECTNAME}_europe-west1-b_$CLUSTERNAME

# make your account an admin
kubectl create clusterrolebinding cluster-admin-binding --clusterrole cluster-admin --user $(gcloud config get-value account)

# switch back to self
gcloud beta container clusters get-credentials $CLUSTERNAME --region=europe-west1-b

# make tiller service account
kubectl create serviceaccount --namespace kube-system tiller
kubectl create clusterrolebinding tiller-clusterrolebinding --clusterrole cluster-admin --serviceaccount kube-system:tiller

# setup helm
helm init --service-account tiller --wait
helm repo add gitlab https://charts.gitlab.io/
helm repo update

# get static IP
export STATICIP=`gcloud compute addresses describe $CLUSTERNAME --region europe-west1 |grep address: |cut -d ":" -f 2|sed 's/ //'`

# setup DNS
gcloud dns --project=$PROJECTNAME record-sets transaction start --zone=$DNSZONE
gcloud dns --project=$PROJECTNAME record-sets transaction add $STATICIP --name=gitlab.$CLUSTERNAME.$DOMAINNAME. --ttl=300 --type=A --zone=$DNSZONE
gcloud dns --project=$PROJECTNAME record-sets transaction execute --zone=$DNSZONE

helm upgrade --install gitlab gitlab/gitlab --timeout 600 --set global.hosts.domain=$CLUSTERNAME.$DOMAINNAME --set global.hosts.externalIP=$STATICIP --set certmanager-issuer.email=$(gcloud config get-value account)