38e55757ca28dbf1caf48fef10c0f6d51fe90b47
docker/swarm.rst
| ... | ... | @@ -1,120 +0,0 @@ |
| 1 | -===== |
|
| 2 | -Swarm |
|
| 3 | -===== |
|
| 4 | ---------------------------- |
|
| 5 | -Instalación y configuración |
|
| 6 | ---------------------------- |
|
| 7 | - |
|
| 8 | -Describimos como instalar swarm y jugar con él un poco. |
|
| 9 | - |
|
| 10 | -Pre-requisitos |
|
| 11 | -============== |
|
| 12 | - |
|
| 13 | -Sistema Operativo |
|
| 14 | ------------------ |
|
| 15 | - |
|
| 16 | -* Instalación mínima de Fedora 25 |
|
| 17 | -* Red pública para el controlador (ens3) |
|
| 18 | -* Red privada para los nodos (ens4) |
|
| 19 | - |
|
| 20 | -Firewall |
|
| 21 | --------- |
|
| 22 | -El firewall debe modificarse para permitir acceso de/a swarm por la interfaz de red privada. Solo abriremos los puertos necesarios. |
|
| 23 | - |
|
| 24 | -.. code:: bash |
|
| 25 | - |
|
| 26 | - # configurar zona |
|
| 27 | - firewall-cmd --permanent --zone=work --add-port=2377/tcp --add-port=7946/tcp --add-port=7946/udp --add-port=4789/udp |
|
| 28 | - |
|
| 29 | - # modificar la zona de ens4 |
|
| 30 | - nmcli connection modify ens4 connection.zone work |
|
| 31 | - |
|
| 32 | - # activar |
|
| 33 | - firewall-cmd --full-reload |
|
| 34 | - nmcli connection reload ens4 |
|
| 35 | - |
|
| 36 | - # verificar |
|
| 37 | - nmcli connection show ens4 |
|
| 38 | - |
|
| 39 | - firewall-cmd --list-all |
|
| 40 | - firewall-cmd --list-all --zone=work |
|
| 41 | - |
|
| 42 | - |
|
| 43 | -Instalación |
|
| 44 | -=========== |
|
| 45 | -Instalaremos la versión más reciente en los repositorios de Fedora. |
|
| 46 | - |
|
| 47 | -.. code:: bash |
|
| 48 | - |
|
| 49 | - # instalar |
|
| 50 | - dnf -y install docker-latest |
|
| 51 | - |
|
| 52 | - # activar |
|
| 53 | - systemctl enable docker-latest |
|
| 54 | - systemctl start docker-latest |
|
| 55 | - |
|
| 56 | - |
|
| 57 | -Configuración |
|
| 58 | -============= |
|
| 59 | -Debemos iniciar un swarm y unir los nodos a él. |
|
| 60 | - |
|
| 61 | -.. code:: bash |
|
| 62 | - |
|
| 63 | - # crear un swarm (manager) |
|
| 64 | - docker swarm init --advertise-addr 192.168.77.1 |
|
| 65 | - |
|
| 66 | - # agregar nodos (nodos) |
|
| 67 | - # ejecutar ésto en nodos swarm2 y swarm3 |
|
| 68 | - docker swarm join --token <token-generado> 192.168.77.1:2377 |
|
| 69 | - |
|
| 70 | - # verificar (manager) |
|
| 71 | - docker info |
|
| 72 | - docker node ls |
|
| 73 | - |
|
| 74 | - |
|
| 75 | -Despliegue |
|
| 76 | -========== |
|
| 77 | -Veremos como desplegar algunas aplicaciones, usando ejemplos simplificados. |
|
| 78 | - |
|
| 79 | -.. code:: bash |
|
| 80 | - |
|
| 81 | - # crear un servicio con 1 réplica |
|
| 82 | - docker service create --replicas 1 --name helloworld alpine ping docker.com |
|
| 83 | - docker service ls |
|
| 84 | - docker service rm helloworld |
|
| 85 | - |
|
| 86 | - |
|
| 87 | - # crear un servicio con 3 réplicas |
|
| 88 | - docker service create --replicas 3 --name helloworld alpine ping docker.com |
|
| 89 | - docker service ls |
|
| 90 | - |
|
| 91 | - |
|
| 92 | - # inspeccionar el servicio |
|
| 93 | - docker service inspect --pretty helloworld |
|
| 94 | - |
|
| 95 | - |
|
| 96 | - # escalar |
|
| 97 | - ## abajo |
|
| 98 | - docker service scale helloworld=1 |
|
| 99 | - docker service inspect --pretty helloworld |
|
| 100 | - |
|
| 101 | - ## arriba |
|
| 102 | - docker service scale helloworld=5 |
|
| 103 | - docker service inspect --pretty helloworld |
|
| 104 | - docker service rm helloworld |
|
| 105 | - |
|
| 106 | - |
|
| 107 | - # exponer servicios |
|
| 108 | - docker service create --name my-web --publish 8080:80 --replicas 3 nginx |
|
| 109 | - docker service ls |
|
| 110 | - docker ps |
|
| 111 | - |
|
| 112 | - ## probar |
|
| 113 | - curl localhost:8080 |
|
| 114 | - curl 192.168.77.1:8080 |
|
| 115 | - curl 104.36.16.224:8080 |
|
| 116 | - |
|
| 117 | - |
|
| 118 | -Referencias |
|
| 119 | -=========== |
|
| 120 | -* https://docs.docker.com/engine/swarm/swarm-tutorial/ |