Terraform Installation

Terraform Installation

We will create two Docker servers using Cloud. These servers will be used to set up a Docker Swarm cluster.

We'll create 2 VMs from Cloud, using the information below:

Swarm Manager:

Distribution: CentOS 7

Size: Medium

Tag: Docker Swarm Manager

Swarm Worker:

Distribution: CentOS 7

Size: Medium

Tag: Docker Swarm Worker


Installing Docker on the Swarm Manager and Worker

These actions will be executed on both the Swarm manager and worker nodes.

Update the operating system

sudo yum update -y

Prerequisites:-

Uninstall old versions:

sudo yum remove -y docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-engine

Install Docker CE:-

Install Utils:

sudo yum install -y yum-utils \
  device-mapper-persistent-data \
  lvm2


Add the Docker repository:

sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

Install Docker CE:

sudo yum -y install docker-ce

Start Docker and enable it:

sudo systemctl start docker && sudo systemctl enable docker

Add cloud_user to the docker group:

sudo usermod -aG docker cloud_user

Test the Docker installation:

docker --version

Configuring Swarm Manager node

On the manager node, initialize the manager:

docker swarm init \
--advertise-addr [PRIVATE_IP]

Configure the Swarm Worker node

On the worker node, add the worker to the cluster:

docker swarm join --token [TOKEN] [PRIVATE_IP]:2377

Verify the Swarm cluster

List Swarm nodes:

docker node ls

Install Terraform:-

Install Terraform 0.11.13 on the Swarm manager:

sudo curl -O https://releases.hashicorp.com/terraform/0.11.13/terraform_0.11.13_linux_amd64.zip
sudo yum install -y unzip
sudo unzip terraform_0.11.13_linux_amd64.zip -d /usr/local/bin/

Test the Terraform installation:

terraform version


Installing Terraform on Docker Infra

On Swarm Manager and Worker, both node perform below operation:-

sudo yum update -y
sudo yum install -y yum-utils device-mapper-persistent-data lvm2
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
sudo yum install -y docker-ce
sudo systemctl start docker
sudo systemctl enable docker
sudo usermod -aG docker cloud_user
docker --version

ON MANAGER NODE ONLY

docker swarm init --advertise-addr [Private_IP_Address]

Install Terraform:-

Install Terraform 0.11.13 on the Swarm manager:

sudo curl -O https://releases.hashicorp.com/terraform/0.11.13/terraform_0.11.13_linux_amd64.zip
sudo yum install -y unzip
sudo unzip terraform_0.11.13_linux_amd64.zip -d /usr/local/bin/

Test the Terraform installation:

terraform version

ON WORKER NODE

docker swarm join --token [TOKEN] [Private_IP_Address_Of_Manager]:2377

Comments

Post a Comment

Popular posts from this blog

Terraform Commands - Hands-on Learning

Installing Terraform What is Terraform and Why do we need it? Terraform Commands:- Here, we begin working with Terraform commands. We will start by creating a very simple Terraform file that will pull down the an image from Docker Hub. List the Terraform commands: terraform Common commands: apply: Builds or changes infrastructure console: Interactive console for Terraform interpolations destroy: Destroys Terraform-managed infrastructure fmt: Rewrites configuration files to canonical format get: Downloads and installs modules for the configuration graph: Creates a visual graph of Terraform resources import: Imports existing infrastructure into Terraform init: Initializes a new or existing Terraform configuration output: Reads an output from a state file plan: Generates and shows an execution plan providers: Prints a tree of the providers used in the configuration push: Uploads this Terraform module to Terraform Enterprise to run refresh: Updates local state file against real resources s...
Read more

Terraform Console and Output

Installing Terraform What is Terraform and Why do we need it? Terraform Commands Hashicorp Configuration Language - HCL Tainting and Untainting Resources We will use the Terraform Console to view various outputs that we can use for our scripts. The Terraform Console is extremely useful for troubleshooting and planning deployments. Terraform commands: console: Interactive console for Terraform interpolations Set up the environment: cd terraform/basics Working with the Terraform console Redeploy the Ghost image and container: terraform apply Show the Terraform resources: terraform show Start the Terraform console: terraform console Type the following in the console to get the container's name: docker_container.container_id.name Type the following in the console to get the container's IP: docker_container.container_id.ip_address Break out of the Terraform console by using Ctrl+C. Destroy the environment: terraform destroy Output the name and IP of the Ghost blog container Edit mai...
Read more

Terraform - Tainting and Updating Resources

Installing Terraform What is Terraform and Why do we need it? Terraform Commands Hashicorp Configuration Language - HCL We are going to take a look at how to force a redeploy of resources using tainting. This is an extremely useful skill for when parts of a deployment need to be modified. Tainting and Untainting Resources Terraform commands: taint: Manually mark a resource for recreation  untaint: Manually unmark a resource as tainted Tainting a resource: terraform taint [NAME] Untainting a resource: terraform untaint [NAME] Set up the environment: cd terraform/basics Redeploy the Ghost image: terraform apply Taint the Ghost blog resource: terraform taint docker_container.container_id See what will be changed: terraform plan Remove the taint on the Ghost blog resource: terraform untaint docker_container.container_id Verity that the Ghost blog resource is untainted: terraform plan Updating Resources Let's edit main.tf and change the image to ghost:alpine. Open main.tf: vi main.tf ma...
Read more