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notes:docker_swarm

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notes:docker_swarm [2025/03/05 12:23] – [Create a swarm] fraternotes:docker_swarm [2025/03/05 13:41] (Version actuelle) – [Validate the swarm status] frater
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 ===== Create a swarm ===== ===== Create a swarm =====
  
-After you complete the tutorial setup steps, you're ready to create a swarm. Make sure the Docker Engine daemon is started on the host machines.+After you complete the setup steps, you're ready to create a swarm. Make sure the Docker Engine daemon is started on the host machines.
  
-Open a terminal and ssh into the machine where you want to run your manager node. This tutorial uses a machine named ''manager1''.+Open a terminal and ssh into the machine where you want to run your manager node. This example we uses a machine named ''docker00''.
  
 Run the following command to create a new swarm: Run the following command to create a new swarm:
Ligne 51: Ligne 51:
  
 <cli> <cli>
-root@docker01:~# docker swarm init --advertise-addr 192.168.99.100+root@docker01:~# docker swarm init --advertise-addr 192.168.80.10
 Swarm initialized: current node (dxn1zf6l61qsb1josjja83ngz) is now a manager. Swarm initialized: current node (dxn1zf6l61qsb1josjja83ngz) is now a manager.
  
 To add a worker to this swarm, run the following command: To add a worker to this swarm, run the following command:
  
-    docker swarm join --token SWMTKN-1-2[snip]wlr 192.168.99.100:2377+    docker swarm join --token SWMTKN-1-2[snip]wlr 192.168.80.10:2377
  
-To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.+To add a manager to this swarm, run ''docker swarm join-token manager'' and follow the instructions.
 </cli> </cli>
  
-**take note of the token provided**+<WRAP center round important> 
 +Take note of the token provided 
 +</WRAP> 
 + 
 +==== Adding manager node ==== 
 + 
 +To add a manager to this swarm, run ''docker swarm join-token manager'' and follow the instructions. 
 + 
 +==== Adding worker node ====
  
 To add a worker to this swarm, run the following command: To add a worker to this swarm, run the following command:
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 root@docker01:~# docker swarm join \ root@docker01:~# docker swarm join \
     --token SWMTKN-1-2[snip]wlr \     --token SWMTKN-1-2[snip]wlr \
-    192.168.99.100:2377+    192.168.80.10:2377
 </cli> </cli>
  
-To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.+The ''--advertise-addr'' flag configures the manager node to publish its address as ''192.168.80.10''. The other nodes in the swarm must be able to access the manager at the IP address.
  
-The --advertise-addr flag configures the manager node to publish its address as 192.168.99.100. The other nodes in the swarm must be able to access the manager at the IP address.+The output includes the commands to join new nodes to the swarm. Nodes will join as managers or workers depending on the value for the ''--token'' flag.
  
-The output includes the commands to join new nodes to the swarm. Nodes will join as managers or workers depending on the value for the --token flag.+==== Validate the swarm status ====
  
-Run docker info to view the current state of the swarm:+Run ''docker info'' to view the current state of the swarm:
  
 <cli> <cli>
-root@docker01:~# docker info+root@docker00:~# docker info 
 +Client: Docker Engine - Community                                                                                                                                                              
 + Version:    28.0.1                                                                                                                                                                            
 + Context:    default                                                                                                                                                                           
 + Debug Mode: false                                                                                                                                                                             
 + Plugins: 
 +  buildx: Docker Buildx (Docker Inc.) 
 +    Version:  v0.21.1 
 +    Path:     /usr/libexec/docker/cli-plugins/docker-buildx 
 +  compose: Docker Compose (Docker Inc.) 
 +    Version:  v2.33.1 
 +    Path:     /usr/libexec/docker/cli-plugins/docker-compose
  
-Containers: 2 +Server: 
-Running: 0 + Containers: 6 
-Paused: 0 +  Running: 3 
-Stopped: 2+  Paused: 0 
 +  Stopped: 3 
 + Images: 6 
 + Server Version: 28.0.1 
 + Storage Driver: overlay2 
 +  Backing Filesystem: extfs
   ...snip...   ...snip...
 Swarm: active Swarm: active
-  NodeID: dxn1zf6l61qsb1josjja83ngz+  NodeID: nh0izhq4pa2plmjdvy00f8um7
   Is Manager: true   Is Manager: true
 +  ClusterID: mbwi9gcqsueen8mcanvme3zc8
   Managers: 1   Managers: 1
-  Nodes: 1+  Nodes: 3
   ...snip...   ...snip...
 </cli> </cli>
  
-Run the docker node ls command to view information about nodes:+Run the ''docker node ls'' command to view information about nodes:
  
 <cli> <cli>
-root@docker01:~# docker node ls +root@docker00:~# docker node ls 
- +ID                            HOSTNAME       STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION 
-ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS +nh0izhq4pa2plmjdvy00f8um7 *   deb-docker00   Ready     Active         Leader           28.0.1 
-dxn1zf6l61qsb1josjja83ngz *  manager1  Ready   Active        Leader+7m0t8hrymi0jlmy1jpf85tknt     deb-docker01   Ready     Active                          28.0.1 
 +tebmpkb8og8ko2jfa2zq0z5oc     deb-docker02   Ready     Active                          28.0.1
 </cli> </cli>
  
 The * next to the node ID indicates that you're currently connected on this node. The * next to the node ID indicates that you're currently connected on this node.
  
-Docker Engine Swarm mode automatically names the node with the machine host name. The tutorial covers other columns in later steps.+Docker Engine Swarm mode automatically names the node with the machine host name.
  
 +<WRAP center round info>
 +In my labs, I've setup 3 nodes, deb-docker00, deb-docker01, deb-docker02.
 +</WRAP>
notes/docker_swarm.1741173799.txt.gz · Dernière modification : 2025/03/05 12:23 de frater

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