Linux/Docker/Swarm: Difference between revisions

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Line 58: Line 58:


== Stack ==
== Stack ==
* docker-compose.yml
<pre>
version: '3.9'
services:
  http:
    image: nginxdemos/hello:latest
    ports:
      - "80:80"
    deploy:
      replicas: 4
      update_config:
        parallelism: 2
        delay: 10s
      restart_policy:
        condition: on-failure
      resources:
        limits:
          cpus: "0.1"
          memory: 1G
</pre>
<pre>
<pre>
docker stack deploy -c docker-compose.yml hello
docker stack deploy -c docker-compose.yml hello


docker stack ls
docker stack ls
docker stack ps hello
docker stack ps hello
docker stack services hello
docker stack services hello


docker stack rm hello
docker stack rm hello
</pre>
</pre>


[[Category:Linux/Docker]]
[[Category:Linux/Docker]]
[[Category:Linux]]
[[Category:Linux]]

Revision as of 19:40, 6 December 2021

Create swarm

  • on manager
docker swarm init --advertise-addr <MANAGER-IP>

-> copy command from here to join from nodes. e.g.:
docker swarm join --token SWMTKN-1-5fs8k04yvhalpcok7xa8ktryuin55w4gt1wf1aaj9vawwh52hx-1uk9i6yz3q7j7bzuqdun2xqwy 192.168.1.226:2377
  • show token
docker swarm join-token manager

Stats / Info

docker node ls

docker service ls

docker service inspect service1 --pretty

docker node ps node1 node2 node3

Manage nodes

from manager:
docker node promote node1
docker node demote node1
docker node rm node1
docker node inspect node1
docker node inspect --pretty node1
docker node update --role manager node1

docker node update --availability drain node1    # pause node and move load to other nodes
docker node update --availability active node1   # unpause and send back to work


from node:
docker swarm leave

Services

docker service create --replicas 4 --name service1 alpine ping google.com

docker service ls                                # list services
docker service ps service1                       # list instances of service on nodes
docker service logs service1 -f

docker service scale service1=0
docker service rm service1

docker service update --image alpine service1


Stack

  • docker-compose.yml
version: '3.9'

services:
  http:
    image: nginxdemos/hello:latest
    ports:
      - "80:80"
    deploy:
      replicas: 4
      update_config:
        parallelism: 2
        delay: 10s
      restart_policy:
        condition: on-failure
      resources:
        limits:
          cpus: "0.1"
          memory: 1G


docker stack deploy -c docker-compose.yml hello

docker stack ls
docker stack ps hello
docker stack services hello

docker stack rm hello