Gitlab

• EKS Cluster(2 Node with )
• Controller EC2 Instance (To Manage the EKS cluster)
• Helm (Gitlab Installation)
• SSL certs(Self-Signed/SSL Provider/Private CA)

EKS Cluster:

https://docs.aws.amazon.com/eks/latest/userguide/install-kubectl.html
curl -o kubectl https://amazon-eks.s3.us-west-2.amazonaws.com/1.18.9/2020-11-02/bin/linux/amd64/kubect
chmod +x ./kubectl
mkdir -p $HOME/bin && cp ./kubectl $HOME/bin/kubectl && export PATH=$PATH:$HOME/bin
yum install bash-completion
kubectl version --client

Install Kubectl bash completion:

yum install bash-completion
type _init_completion
source /usr/share/bash-completion/bash_completion
type _init_completion
echo 'source <(kubectl completion bash)' >>~/.bashrc
kubectl completion bash >/etc/bash_completion.d/kubectl

Get EKS Cluster list and Import kubeconfig:
(replace the –name with Cluster name)

aws eks update-kubeconfig --name <NAME OF THE EKS CLUSTER >

Install Helm:

curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3
chmod 700 get_helm.sh
./get_helm.sh
cp /usr/local/bin/helm /usr/bin/

Install Helm Auto completion:

helm completion bash >> ~/.bash_completion
. /etc/profile.d/bash_completion.sh
. ~/.bash_completion
source <(helm completion bash)

Now, EC2 instance is ready for the Gitlab installation. Before going to install the Gitlab in EKS. Let create TLS and Generic Secrets for Gitlab and Gitlab-Runner.

You can use any other SSL provider like(Lets Encrypt, Digicert, Comodo …). Here i am using Self Signed Certificates. You can generate Self Signed Certificates with this Link.

kubectl create secret tls gitlab-self-signed --cert=gitlab.gitlabtesting.com.crt --key=gitlab.gitlabtesting.com.key

Here we created secret name gitlab-self-signed with cert and Key. It is better way of mounting the SSL certificate to Ingress.

Create SSL Generic cert Secret:

This will be used for communication between the Gitlab Server and Gitlab-runner Visa SSL. (IMPORTANT: Make sure the filename you mounting Match with the Domain). in this Case my Domain name is gitlab.gitlabtesting.com.

kubectl create secret generic gitlabsr-runner-certs-secret-3 --from-file=gitlab.gitlabtesting.com.crt=gitlab.gitlabtesting.com.crt

Create service account:(This will be used for gitlab-runner to perform actions)

vim gitlab-serviceaccount.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  name: gitlab
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: gitlab-admin
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
  - kind: ServiceAccount
    name: gitlab
    namespace: kube-system

kubectl apply -f vim gitlab-serviceaccount.yaml

Now that everything ready lets create vaules.yaml for Gitlab Values.

Example file look below.

Add Gitlab Helm to repo:

certmanager-issuer:
  email: [email protected]
certmanager:
  install: false
gitlab:
  sidekiq:
    resources:
      requests:
        cpu: 50m
        memory: 650M
  webservice:
    ingress:
      tls:
        secretName: gitlab-self-signed #TLS Secret we catered above
    resources:
      requests:
        memory: 1.5G
gitlab-runner:
  install: false
  runners:
    privileged: true
global:
  hosts:
    domain: gitlabtesting.com
  ingress:
    tls:
      enabled: true
registry:
  enabled: false
  install: false
  ingress:
    tls:
      secretName: gitlab-self-signed #TLS Secret we catered above

helm repo add gitlab https://charts.gitlab.io/

Install Gitlab with Helm with Values file we created above:

helm install gitlab gitlab/gitlab -f values.yaml

kubectl get po


#Get Root password:

kubectl get secret gitlab-gitlab-initial-root-password -ojsonpath='{.data.password}' | base64 --decode ; echo