• Manager node is the node that hosts the administration service.
• Worker node is a node that hosts other services, not running the administration service.

The following prerequisites apply:

• Two Digital Access components with services and docker swarm available 
• The following ports shall be open to traffic to and from each Docker host participating on an overlay network:
  • TCP port 2377 for cluster management communications
  • TCP and UDP port 7946 for communication among nodes
  • UDP port 4789 for overlay network traffic
• For more details refer to: https://docs.docker.com/network/overlay/
• Keep a note of IP addresses of nodes where access point is running.

1. SSH to the node running the administration service, that is, the manager node.

2. Get the cluster join token by running this command. This token will be used for joining worker nodes to the manager node.

   Code Block
   title Get token
   sudo docker swarm join-token worker

   Output of the command will be like:

   Panel
   title Output
   docker swarm join --token SWMTKN-1-5dxny21y4oslz87lqjzz4wj2wejy6vicjtqwq33mvqqni42ki2-1gvl9xiqcrlxuxoafesxampwq 192.168.253.139:2377

   
   

1. Stop the running services.

   Code Block
   title Stop services
   sudo docker stack rm <your da stack name>

   
   

1. SSH to manager node.

2. Remove label for all services which are not required on this node.

   Code Block
   title Remove label
   sudo docker node update --label-rm da-accesspointaccess-point <nodeid>

   
   

3. Verify if all nodes are part of cluster by running this command.

   Code Block
   title Verify if all nodes are part of cluster
   sudo docker node ls

   

4. Identify nodes ID, master and worker where the service will be distributed.

   Code Block
   title Identify nodes
   sudo docker node inspect --format '{{ .Status }}' h9u7iiifi6sr85zyszu8xo54l

   Output: {ready  192.168.86.129} - IP address will help to identify the DA node  

1.  Update labels for each service which you want to run on worker nodes.
    <node ID> is the id of the node on which the service will be running.

   Code Block
   title Commands to update labels
   sudo docker node update --label-add da-policy-service=true <node ID> sudo docker node update --label-add da-authentication=true <node ID> <worker node ID> sudo docker node update --label-add da-access-accesspointpoint=true <node ID> sudo docker node update --label-add da-distribution=true <node<worker node ID>

   
   

2. Deploy your stack using this command. To run the command your working directory should be docker-compose.

   Code Block
   title Deploy DA stack
   sudo docker stack deploy --compose-file docker-compose.yml -c network.yml -c versiontag.yml <your da stack name>

   Here: 

   • docker stack deploy is the command to deploy services as stack. 
   • compose file flag is used to provide the file name of base docker-compose file. 
   • -c is short for –compose-file flag. It is used to provide override files for docker -compose. 
   • <your da stack name> is the name of the stack. You can change it based on requirements.