added more sections to the post
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ahmza
@@ -211,6 +211,10 @@ and make any changes you feel are necessary.
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> Check the [git repo](https://gitlab.com/AHMZA/pi-docker-swarm-ansible-deploy/-/tree/main) for the most up to date yaml file im using.
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**This script assumes you are using SSH keys, which you should but if
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not you can skip the whole "Configure SSH" block,**
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***I RECCOMEND YOU USE SSH KEYS*** - [read this](https://blog.ahmza.com/posts/securing-ssh/)
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**Create the deploy.yml**
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```yaml
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@@ -218,27 +222,35 @@ and make any changes you feel are necessary.
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- hosts: piCluster
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become: yes
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tasks:
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- name: Auth local SSH Keys
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ansible.posix.authorized_key:
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user: <pi_user>
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state: present
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key: "{{ item }}"
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with_file:
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- /home/<local_user>/.ssh/id_rsa.pub
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- ./pi_rsa.pub
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- name: Copy SSH Pi Intercoms Private Key
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copy:
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src: ./pi_rsa
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dest: /home/<pi_user>/.ssh/id_rsa
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mode: '0600'
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- name: Configure SSH
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block:
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- name: Auth local SSH Keys
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ansible.posix.authorized_key:
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user: <pi_user>
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state: present
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key: "{{ item }}"
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with_file:
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- /home/<local_user>/.ssh/id_rsa.pub
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- ./pi_rsa.pub
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- name: Copy SSH Pi Intercoms Private Key
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copy:
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src: ./pi_rsa
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dest: /home/<pi_user>/.ssh/id_rsa
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mode: '0600'
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owner: <pi_user>
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group: <pi_user>
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- name: Copy SSH Pi Intercoms Public Key
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copy:
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src: ./pi_rsa.pub
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dest: /home/<pi_user>/.ssh/id_rsa.pub
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mode: '0644'
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owner: <pi_user>
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group: <pi_user>
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- name: Copy SSH Pi Intercoms Public Key
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copy:
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src: ./pi_rsa.pub
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dest: /home/<pi_user>/.ssh/id_rsa.pub
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mode: '0644'
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- name: Check for any updates and install them
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apt:
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@@ -254,42 +266,46 @@ and make any changes you feel are necessary.
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- vim
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- curl
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- name: Check Docker is installed
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shell: "docker --version"
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register: docker_version
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- name: Install Docker
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block:
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- name: Download Docker script
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command: curl -fsSL https://get.docker.com -o get-docker.sh
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- name: Run Docker install script
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command: sudo sh get-docker.sh
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- name: Enable docker service
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service:
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name: "{{ item }}"
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enabled: true
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state: started
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loop:
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- docker
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- containerd
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- name: Add user to docker group
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user:
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name: <pi_user>
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groups: docker
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append: yes
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when: docker_version.stdout.find('Docker version')
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- name: check Docker compose is installed
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shell: "docker-compose --version"
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register: dc_version
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- name: Download Docker script
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command: curl -fsSL https://get.docker.com -o get-docker.sh
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when: docker_version.stdout.find('Docker version')
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- name: Run Docker install script
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command: sudo sh get-docker.sh
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when: docker_version.stdout.find('Docker version')
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- name: Install docker compose
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command: sudo pip3 -v install docker-compose
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when: dc_version.stdout.find('docker-compose version')
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- name: Enable docker service
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service:
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name: "{{ item }}"
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enabled: true
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state: started
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loop:
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- docker
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- containerd
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when: docker_version.stdout.find('Docker version')
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- name: Add user to docker group
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user:
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name: <pi_user>
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groups: docker
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append: yes
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when: docker_version.stdout.find('Docker version')
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- name: wait for network on boot
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command: raspi-config nonint do_boot_wait 0
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@@ -304,31 +320,36 @@ The steps this playbook takes are as follows:
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3. Check for and Install updates
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4. Install any build dependancies
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5. Check if Docker is Installed
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* Download the Docker Script
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* Install Docker from script
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* Enable the Docker service
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* Add user to Docker group
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6. Check if docker-compose is installed
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* Check this because if they are already installed we can skip these steps and save time
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7. Download the Docker Script
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8. Install Docker from script
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9. Install docker-compose (This will take a while on each pi so be patient, grab a coffee)
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10. Enable the Docker service
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11. Add user to Docker group
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12. Change raspi config to wait for network before boot
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13. Reboot
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* Install docker-compose (This will take a while on each pi so be patient, grab a coffee)
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9. Change raspi config to wait for network before boot
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10. Reboot
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take some time to read through the playbook, read the docs and try to
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understand whats going on. Change the usernames to your username.
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Make the hosts file in the same directory as the deploy.yml
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**Make the hosts file in the same directory as the deploy.yml**
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``` yaml
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[piCluster]
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10.10.10.20
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10.10.10.21
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10.10.10.22
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```
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* `[piCluster]` - specifies a group of hosts
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* `10.10.10.xx` - specifies the Pis IP
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heres the command to run the playbook.
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**create the Pi Intercommunication keys**
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``` bash
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ssh-keygen
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Enter file in which to save the key (/home/ahmza/.ssh/id_rsa): .pi_rsa
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```
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* save the keys in the same directory the deploy.yml file is
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**heres the command to run the playbook.**
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`ansible-playbook -i hosts -kK deploy.yml -c paramiko`
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@@ -341,23 +362,86 @@ heres the command to run the playbook.
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You can do so much with _Ansible_, for example mount network shares etc,
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if you can do it in the cli you can do it in _Ansible_ !!
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Now that the ansible script is done we can go ahead and actually
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Now that the _Ansible_ script is done we can go ahead and actually
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configure all the Pis into the cluster.
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### **Creating/Joining the swarm **
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Creating and joining the cluster is easy - It is a bit manual so this
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is something you could impliment into the ansible playbook using
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multiple host groups. Keep an eye out on the git repo as I may
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implement this myself.
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### **Creating/Joining the swarm**
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Creating and joining the cluster is easy - It is manual and tedious so
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this is something you could impliment into the ansible playbook using
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multiple host groups.
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**Follow the steps below to create the swarm:**
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1. ssh to the main swarm node, this will be the manager node.
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**Follow these steps to create the swarm:**
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1. ssh to the main Pi, this will be the manager node.
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2. run `docker swarm init`
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* This will return a command and token. Make sure to copy this token to your clipboard
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3. exit the main swarm node
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* This will return a command and token. Make sure to copy them
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3. exit the main Pi
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4. ssh to one of the worker nodes
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5. paste and run the copied command
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6. do the same on the remaining worker nodes
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You should now have a correctly configured cluster !!
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You should now have a correctly configured cluster !! From here there
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are multiple ways to go about managing your cluster. I'll demonstrate
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one here but will link others too for further reading.
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### **Portainer**
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Portainer is a webgui that will allow us to manage the cluster, it will
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make deploying and destroying containers across the cluster a breeze.
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I do understand that all of what portainer does can simply be accomplished
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in the command line, however portainer just makes it less hastle to manage.
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**Install Portainer**
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Firstly we want to download the yaml file that will be used to deploy
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the portainer contiainer on our cluster.
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`curl -L https://downloads.portainer.io/portainer-agent-stack.yml -o portainer-agent-stack.yml`
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Now we can actually deploy portainer to the cluster using the following
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command:
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`docker stack deploy -c portainer-agent-stack.yml portainer`
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Once the stack is up and running navigate to:
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`https://raspberry-ip:9443`
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where raspberry-ip is the IP address of the manager node in the swarm.
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### **Optional last step**
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If you intend to build any of your own docker images then it may be useful
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to create a private repository to host any images that you need to run
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across the cluster.
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to create this private repository create a file called docker-compose.yml
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in a folder called repository or whatever and enter the following.
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``` yaml
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version: '3.9'
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services:
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registry:
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image: registry:2
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ports:
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- 5000:5000
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volumes:
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- /home/<pi-user>/docker/registry/data:/var/lib/registry
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```
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**Be sure to change pi-user to your pi user**
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**create a file /etc/docker/daemon.json and eter the following**
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``` json
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{
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"insecure-registries": ["localhost:5000", "<pi-address>:5000"]
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}
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```
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where `pi-address` is the ip address of the main swarm node.
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**restart the docker service with `sudo systemctl restart docker`**
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now we need to deploy the registry to the stack like we did with portainer
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`docker stack deploy -c docker-compose.yml registry`
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and we should have a private registry setup that we can use to push our
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custom docker images to.
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Reference in New Issue
Block a user