amvasilyev / docker-swarm-stack-test

The tests of setting up the services with Docker Swarm

Running this configuration

1. Install latest release of the docker engire. Currently the test were made with 18.09.5 release.

2. Switch Docker into the swarm mode:

   docker swarm init --default-addr-poll 10.254.0.0/16
   

   You may specify another address poll, if it overlaps with your organization network.

   In order to leave the swarm mode execute the following command.

   docker swarm leave --force
   

3. Configure the routing to the swarm network.

   1. You need to know the IP of the host that provides access to the overlay networks:

      ip route | grep docker_gwbridge
      

      My output is:

      172.18.0.0/16 dev docker_gwbridge proto kernel scope link src 172.18.0.1
      

      The required address is: 172.18.0.1.

   2. Add route to the swarm address pool:

      sudo route add -net 10.254.0.0/16 gw 172.18.0.1
      

4. Create the stack for the back-end:

   docker stack deploy -c service.yaml test_000
   

   This stack consists out of 4 instances of Mariadb 10.3 with users repl, maxuser created.

5. Get the IP-addresses of the back-end.

   1. Get the id of the stack tasks:

   docker stack ps test_000
   

   2. Get the IP address from the task:

   docker inspect --format '{{range .NetworksAttachments}}{{.Addresses}}{{end}}' TASK_ID
   

6. Spin-up the MaxScale that will connect to the services:

   docker stack deploy -c full-service.yaml test_000
   

7. Inspect the MaxScale startup log

   1. Get the id of the service that belong to required task:

   docker inspect --format "{{.ServiceID}}" TASK_ID
   

   2. Get the logs of the service

   docker service logs SERVICE_ID
   

8. When finished, remove the service stack:

   docker stack rm test_000