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| docker_advanced_install_swarm_intro [2020/01/24 19:41] – andonovj | docker_advanced_install_swarm_intro [2020/03/09 12:18] (current) – [Create service] andonovj | ||
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| Line 13: | Line 13: | ||
| =====Setup===== | =====Setup===== | ||
| Let's set it up. | Let's set it up. | ||
| - | We will have 5 servers: | + | We will have 3 servers: |
| - | * 3 Managers | + | * 1 Manager |
| * 2 Workers | * 2 Workers | ||
| + | |||
| + | ====Automatic==== | ||
| + | You can see the automatic creation in the Vagrant section: [[vagrant_docker_install|Multiple Servers Configuration with Vagrant]] | ||
| + | |||
| + | After the setup is done, please be sure that workers, have joined, we can create the service as follows: | ||
| + | |||
| + | ====Manual==== | ||
| + | The creation of the VMs and installation of docker-ce will not be discussed as it has been done in at least 10 other sections. | ||
| + | So let's check how to setup manager and 2 workers: | ||
| + | |||
| + | ===Initiation=== | ||
| + | The initiation of the Swarm is done from one of the managers as follow: | ||
| + | < | ||
| + | docker swarm init --listen-addr 10.100.199.200: | ||
| + | </ | ||
| + | |||
| + | That command will initialize a swarm with 1 manager who will listen on IP: 10.100.199.200: | ||
| + | |||
| + | ===Addition=== | ||
| + | To join a swarm a server must have the swarm' | ||
| + | |||
| + | < | ||
| + | [root@mgr1 ~]# docker swarm join-token manager | ||
| + | To add a manager to this swarm, run the following command: | ||
| + | |||
| + | docker swarm join --token SWMTKN-1-4mqe4htimsl9wrlzstzx6c18qmibjfjuuihdp3o91pnmssbvml-69b13glzhdgfzh58hbg7jwn69 10.100.199.200: | ||
| + | |||
| + | [root@mgr1 ~]# docker swarm join-token worker | ||
| + | To add a worker to this swarm, run the following command: | ||
| + | |||
| + | docker swarm join --token SWMTKN-1-4mqe4htimsl9wrlzstzx6c18qmibjfjuuihdp3o91pnmssbvml-1h1yrqixgrme7aypq6c4m0npj 10.100.199.200: | ||
| + | |||
| + | [root@mgr1 ~]# | ||
| + | |||
| + | </ | ||
| + | |||
| + | Now, it is good idea to ALWAYS add the advertise and listener address to the server: | ||
| + | |||
| + | Manually, workers and manager can be joined to the swarm as follows: | ||
| + | |||
| + | < | ||
| + | docker swarm join --token SWMTKN-1-4mqe4htimsl9wrlzstzx6c18qmibjfjuuihdp3o91pnmssbvml-1h1yrqixgrme7aypq6c4m0npj \ | ||
| + | manager_advertise_ip: | ||
| + | --advertise-addr worker_advert_ip_addr: | ||
| + | --listener-addr worker_listen_ip_addr: | ||
| + | </ | ||
| + | |||
| + | Insert the correct token depending on, if you are adding worker or a manager. The above is for worker. | ||
| + | |||
| + | =====Create service===== | ||
| + | The creation of the service is rather easy: | ||
| + | |||
| + | <sxh bash> | ||
| + | [root@mgr1 ~]# docker service create --name httpDemoService --replicas 3 -p 80:1234 andonovj/ | ||
| + | nz82mserbonjcoccp7iir7hfn | ||
| + | overall progress: 3 out of 3 tasks | ||
| + | 1/3: running | ||
| + | 2/3: running | ||
| + | 3/3: running | ||
| + | verify: Service converged | ||
| + | [root@mgr1 ~]# docker service ls | ||
| + | ID NAME MODE REPLICAS | ||
| + | q8s7iiv4rwu7 | ||
| + | [root@mgr1 ~]# | ||
| + | [root@mgr1 ~]# | ||
| + | [root@mgr1 ~]# | ||
| + | [root@mgr1 ~]# | ||
| + | [root@mgr1 ~]# docker node ls | ||
| + | ID HOSTNAME | ||
| + | occzvuwmny5rm8x8an4bctdc1 * | ||
| + | 7oubfm1qdun533xw9s14lt3pu | ||
| + | sdcosdbt1f94rrvbr8m9ng30s | ||
| + | [root@mgr1 ~]# | ||
| + | [root@mgr1 ~]# docker service ps httpDemoService | ||
| + | ID NAME IMAGE NODE DESIRED STATE | ||
| + | avcanadogs3e | ||
| + | 6pgfba2xdg0q | ||
| + | me2174rye7nu | ||
| + | [root@mgr1 ~]# | ||
| + | |||
| + | </ | ||