Este artículo propone automatizar la instalación de Kubernetes 1.13 en Raspberry Pi a través de Ansible con un rol hecho a medida.
Requisitos previos
- Haber instalado Raspbian en las Raspberry Pi objetivo (al menos 2), el procedimiento está disponible en un artículo anterior Inicialización y securización automatizadas de Raspbian en Raspberry Pi
Instalación de Docker + Kubernetes
Recuperación del rol He desarrollado un rol ansible para esta automatización, aquí está cómo recuperarlo:
## Pré-requis Docker (rôle fait maison)
git clone https://gitlab.com/jls42/ansible-rpi-docker.git roles/ansible-rpi-docker
## Rôle pour l'installation de Kubernetes
git clone https://gitlab.com/jls42/ansible-rpi-k8s.git roles/ansible-rpi-k8s
Para más detalles ir a ver la documentación en ansible-rpi-k8s
Creación del archivo de inventario llamado inventory En este ejemplo de inventario varios Raspberry Pi 1, uno posee la ip 192.168.1.190 y el otro la ip 192.168.1.191 En el grupo hijo (aquí rpi-k8s), el master debe ser declarado en primer lugar
[rpi1]
192.168.1.190 k8s_master=true
[rpi2]
192.168.1.191
[rpi-k8s:children]
rpi1
rpi2
Preparación del playbook k8s-rpi.yml
---
- name: "Installation de Docker sur le Raspberry Pi"
hosts: rpi-k8s
remote_user: "pi"
roles:
- roles/ansible-rpi-docker
vars:
docker_version: 18.06.1~ce~3-0~raspbian
- name: "Installation de k8s sur le Raspberry Pi"
hosts: rpi-k8s
remote_user: "pi"
roles:
- roles/ansible-rpi-k8s
vars:
k8s_version: "1.13.0-00"
k8s_master_token: "abcdef.0123456789abcdef"
k8s_cluster_group: rpi-k8s
Despliegue de Docker y Kubernetes Los roles ansible-rpi-docker y ansible-rpi-k8s van a ser lanzados a continuación. En el caso donde docker ya esté instalado, es posible solo ejecutar ansible-rpi-k8s.
export ANSIBLE_HOST_KEY_CHECKING=False
ansible-playbook -b -i inventory k8s-rpi.yml
Lo que da:
jls42@boo:~/rpi$ ansible-playbook -b -i inventory k8s-rpi.yml
PLAY [Installation de Docker sur le Raspberry Pi] ******************************************************************************************************************************************************************************************
TASK [Gathering Facts] *********************************************************************************************************************************************************************************************************************
Sunday 09 December 2018 03:26:30 +0100 (0:00:00.051) 0:00:00.051 *******
ok: [192.168.1.190]
ok: [192.168.1.191]
TASK [roles/ansible-rpi-docker : Installe les paquets nécessaire à l'utilisation d'un dépôt HTTPS] *****************************************************************************************************************************************
Sunday 09 December 2018 03:26:33 +0100 (0:00:03.476) 0:00:03.527 *******
changed: [192.168.1.190] => (item=[u'apt-transport-https', u'ca-certificates', u'curl', u'gnupg2', u'software-properties-common'])
changed: [192.168.1.191] => (item=[u'apt-transport-https', u'ca-certificates', u'curl', u'gnupg2', u'software-properties-common'])
TASK [roles/ansible-rpi-docker : Ajoute la clef officielle du dépôt Docker] ****************************************************************************************************************************************************************
Sunday 09 December 2018 03:27:12 +0100 (0:00:39.274) 0:00:42.802 *******
changed: [192.168.1.190]
changed: [192.168.1.191]
TASK [roles/ansible-rpi-docker : Ajoute le dépôt Docker] ***********************************************************************************************************************************************************************************
Sunday 09 December 2018 03:27:17 +0100 (0:00:04.747) 0:00:47.549 *******
changed: [192.168.1.190]
changed: [192.168.1.191]
TASK [roles/ansible-rpi-docker : Installe le paquet docker-ce] *****************************************************************************************************************************************************************************
Sunday 09 December 2018 03:27:27 +0100 (0:00:10.238) 0:00:57.788 *******
changed: [192.168.1.190]
changed: [192.168.1.191]
TASK [roles/ansible-rpi-docker : Installe python-pip] **************************************************************************************************************************************************************************************
Sunday 09 December 2018 03:29:04 +0100 (0:01:36.285) 0:02:34.074 *******
changed: [192.168.1.191]
changed: [192.168.1.190]
TASK [roles/ansible-rpi-docker : Installe docker-compose via pip] **************************************************************************************************************************************************************************
Sunday 09 December 2018 03:30:06 +0100 (0:01:02.641) 0:03:36.715 *******
changed: [192.168.1.191]
changed: [192.168.1.190]
TASK [roles/ansible-rpi-docker : Configure Docker pour qu'il démarre au boot] **************************************************************************************************************************************************************
Sunday 09 December 2018 03:31:03 +0100 (0:00:56.384) 0:04:33.099 *******
ok: [192.168.1.190]
ok: [192.168.1.191]
TASK [roles/ansible-rpi-docker : Ajoute l'utilisateur pi dans le groupe docker] ************************************************************************************************************************************************************
Sunday 09 December 2018 03:31:04 +0100 (0:00:01.075) 0:04:34.175 *******
changed: [192.168.1.191]
changed: [192.168.1.190]
TASK [roles/ansible-rpi-docker : Supprime la swap] *****************************************************************************************************************************************************************************************
Sunday 09 December 2018 03:31:05 +0100 (0:00:01.348) 0:04:35.523 *******
changed: [192.168.1.190]
changed: [192.168.1.191]
PLAY [Installation de k8s sur le Raspberry Pi] *********************************************************************************************************************************************************************************************
TASK [Gathering Facts] *********************************************************************************************************************************************************************************************************************
Sunday 09 December 2018 03:31:07 +0100 (0:00:02.096) 0:04:37.620 *******
ok: [192.168.1.190]
ok: [192.168.1.191]
TASK [roles/ansible-rpi-k8s : Installe les paquets nécessaires à l'utilisation d'un dépôt HTTPS] *******************************************************************************************************************************************
Sunday 09 December 2018 03:31:09 +0100 (0:00:01.934) 0:04:39.555 *******
ok: [192.168.1.190] => (item=[u'apt-transport-https', u'ca-certificates', u'curl', u'gnupg2', u'software-properties-common'])
ok: [192.168.1.191] => (item=[u'apt-transport-https', u'ca-certificates', u'curl', u'gnupg2', u'software-properties-common'])
TASK [roles/ansible-rpi-k8s : Supprime la swap] ********************************************************************************************************************************************************************************************
Sunday 09 December 2018 03:31:15 +0100 (0:00:05.740) 0:04:45.295 *******
ok: [192.168.1.190]
ok: [192.168.1.191]
TASK [roles/ansible-rpi-k8s : Active cgroup_memory] ****************************************************************************************************************************************************************************************
Sunday 09 December 2018 03:31:16 +0100 (0:00:00.966) 0:04:46.262 *******
changed: [192.168.1.190]
changed: [192.168.1.191]
TASK [roles/ansible-rpi-k8s : Redémarre] ***************************************************************************************************************************************************************************************************
Sunday 09 December 2018 03:31:17 +0100 (0:00:01.032) 0:04:47.295 *******
changed: [192.168.1.191]
changed: [192.168.1.190]
TASK [roles/ansible-rpi-k8s : Attente suite au redémarrage] ********************************************************************************************************************************************************************************
Sunday 09 December 2018 03:31:18 +0100 (0:00:01.667) 0:04:48.962 *******
ok: [192.168.1.190]
ok: [192.168.1.191]
TASK [roles/ansible-rpi-k8s : Ajoute la clef officielle Kubernetes] ************************************************************************************************************************************************************************
Sunday 09 December 2018 03:32:19 +0100 (0:01:00.447) 0:05:49.409 *******
changed: [192.168.1.190]
changed: [192.168.1.191]
TASK [roles/ansible-rpi-k8s : Ajoute le dépôt stable de Kubernetes] ************************************************************************************************************************************************************************
Sunday 09 December 2018 03:32:25 +0100 (0:00:06.282) 0:05:55.692 *******
changed: [192.168.1.190]
changed: [192.168.1.191]
TASK [roles/ansible-rpi-k8s : Installe kubeadm, kubelet and kubectl] ***********************************************************************************************************************************************************************
Sunday 09 December 2018 03:32:45 +0100 (0:00:20.277) 0:06:15.970 *******
changed: [192.168.1.190] => (item=[u'kubeadm=1.13.0-00', u'kubelet=1.13.0-00', u'kubectl=1.13.0-00'])
changed: [192.168.1.191] => (item=[u'kubeadm=1.13.0-00', u'kubelet=1.13.0-00', u'kubectl=1.13.0-00'])
TASK [roles/ansible-rpi-k8s : Configure kubelet pour qu'il démarre au boot] ****************************************************************************************************************************************************************
Sunday 09 December 2018 03:34:25 +0100 (0:01:39.895) 0:07:55.865 *******
ok: [192.168.1.191]
ok: [192.168.1.190]
TASK [roles/ansible-rpi-k8s : Installe les paquets nécessaires pour l'utilisation du client CIFS] ******************************************************************************************************************************************
Sunday 09 December 2018 03:34:26 +0100 (0:00:01.029) 0:07:56.894 *******
changed: [192.168.1.191] => (item=[u'cifs-utils', u'util-linux', u'coreutils', u'jq'])
changed: [192.168.1.190] => (item=[u'cifs-utils', u'util-linux', u'coreutils', u'jq'])
TASK [roles/ansible-rpi-k8s : Ajout le répertoire d'addons cifs] ***************************************************************************************************************************************************************************
Sunday 09 December 2018 03:34:40 +0100 (0:00:13.835) 0:08:10.730 *******
changed: [192.168.1.191]
changed: [192.168.1.190]
TASK [roles/ansible-rpi-k8s : Télécharge le plugin CIFS] ***********************************************************************************************************************************************************************************
Sunday 09 December 2018 03:34:41 +0100 (0:00:01.051) 0:08:11.782 *******
changed: [192.168.1.191]
changed: [192.168.1.190]
TASK [roles/ansible-rpi-k8s : Installe les paquets nécessaires à l'utilisation du client GlusterFS] *********************************************************************************************************************************************************
Sunday 09 December 2018 03:34:43 +0100 (0:00:01.740) 0:08:13.522 *******
changed: [192.168.1.190] => (item=[u'glusterfs-client'])
changed: [192.168.1.191] => (item=[u'glusterfs-client'])
TASK [roles/ansible-rpi-k8s : Définie l'ip du maître] **************************************************************************************************************************************************************************************
Sunday 09 December 2018 03:35:16 +0100 (0:00:32.640) 0:08:46.162 *******
ok: [192.168.1.190]
ok: [192.168.1.191]
TASK [roles/ansible-rpi-k8s : Vérifie si le master a déjà été configuré] *******************************************************************************************************************************************************************
Sunday 09 December 2018 03:35:16 +0100 (0:00:00.113) 0:08:46.276 *******
skipping: [192.168.1.191]
ok: [192.168.1.190]
TASK [roles/ansible-rpi-k8s : Définie l'initialisation du cluster à oui] *******************************************************************************************************************************************************************
Sunday 09 December 2018 03:35:17 +0100 (0:00:01.074) 0:08:47.350 *******
skipping: [192.168.1.191]
ok: [192.168.1.190]
TASK [roles/ansible-rpi-k8s : Définie l'initialisation du cluster à non] *******************************************************************************************************************************************************************
Sunday 09 December 2018 03:35:17 +0100 (0:00:00.113) 0:08:47.464 *******
skipping: [192.168.1.190]
skipping: [192.168.1.191]
TASK [roles/ansible-rpi-k8s : Définie l'initialisation du/des noeud(s)] ********************************************************************************************************************************************************************
Sunday 09 December 2018 03:35:17 +0100 (0:00:00.097) 0:08:47.562 *******
skipping: [192.168.1.190]
ok: [192.168.1.191]
TASK [roles/ansible-rpi-k8s : Initialise le cluster Kubernetes sur le maître] **************************************************************************************************************************************************************
Sunday 09 December 2018 03:35:17 +0100 (0:00:00.181) 0:08:47.743 *******
skipping: [192.168.1.191]
changed: [192.168.1.190]
TASK [roles/ansible-rpi-k8s : Attend la fin de l'initialisation] ***************************************************************************************************************************************************************************
Sunday 09 December 2018 03:35:19 +0100 (0:00:01.598) 0:08:49.342 *******
skipping: [192.168.1.191]
FAILED - RETRYING: Attend la fin de l'initialisation (42 retries left).
FAILED - RETRYING: Attend la fin de l'initialisation (41 retries left).
FAILED - RETRYING: Attend la fin de l'initialisation (40 retries left).
FAILED - RETRYING: Attend la fin de l'initialisation (39 retries left).
FAILED - RETRYING: Attend la fin de l'initialisation (38 retries left).
FAILED - RETRYING: Attend la fin de l'initialisation (37 retries left).
FAILED - RETRYING: Attend la fin de l'initialisation (36 retries left).
FAILED - RETRYING: Attend la fin de l'initialisation (35 retries left).
FAILED - RETRYING: Attend la fin de l'initialisation (34 retries left).
FAILED - RETRYING: Attend la fin de l'initialisation (33 retries left).
FAILED - RETRYING: Attend la fin de l'initialisation (32 retries left).
changed: [192.168.1.190]
TASK [roles/ansible-rpi-k8s : Crée le répertoire kubernetes /home/pi/.kube/] ***************************************************************************************************************************************************************
Sunday 09 December 2018 03:41:02 +0100 (0:05:43.339) 0:14:32.682 *******
skipping: [192.168.1.191]
changed: [192.168.1.190]
TASK [roles/ansible-rpi-k8s : Copie le fichier /etc/kubernetes/admin.conf vers /home/pi/.kube/config] **************************************************************************************************************************************
Sunday 09 December 2018 03:41:03 +0100 (0:00:00.948) 0:14:33.630 *******
skipping: [192.168.1.191]
changed: [192.168.1.190]
TASK [roles/ansible-rpi-k8s : Récupère la configuration kubernetes dans un répertoire local] ***********************************************************************************************************************************************
Sunday 09 December 2018 03:41:04 +0100 (0:00:01.030) 0:14:34.661 *******
skipping: [192.168.1.191]
changed: [192.168.1.190]
TASK [roles/ansible-rpi-k8s : Jointure de(s) noeud(s) avec le maître] **********************************************************************************************************************************************************************
Sunday 09 December 2018 03:41:05 +0100 (0:00:01.016) 0:14:35.678 *******
skipping: [192.168.1.190]
changed: [192.168.1.191]
TASK [roles/ansible-rpi-k8s : Installation des pods réseaux avec Weave] ********************************************************************************************************************************************************************
Sunday 09 December 2018 03:41:12 +0100 (0:00:06.567) 0:14:42.245 *******
skipping: [192.168.1.191]
changed: [192.168.1.190]
PLAY RECAP *********************************************************************************************************************************************************************************************************************************
192.168.1.190 : ok=33 changed=23 unreachable=0 failed=0
192.168.1.191 : ok=27 changed=18 unreachable=0 failed=0
Sunday 09 December 2018 03:41:18 +0100 (0:00:05.893) 0:14:48.139 *******
===============================================================================
roles/ansible-rpi-k8s ------------------------------------------------- 608.58s
roles/ansible-rpi-docker ---------------------------------------------- 274.09s
setup ------------------------------------------------------------------- 5.41s
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
total ----------------------------------------------------------------- 888.09s
Playbook run took 0 days, 0 hours, 14 minutes, 48 seconds
Verificación
Nos conectamos a la Raspberry Pi para confirmar la buena instalación de Kubernetes (los nodos no estarán forzosamente todos en estado “Ready” de inmediato, esto puede tomar algunos minutos)
jls42@boo:~/rpi$ ssh pi@192.168.1.190
Linux rpi1 4.14.79-v7+ #1159 SMP Sun Nov 4 17:50:20 GMT 2018 armv7l
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Sun Dec 9 02:41:12 2018 from 192.168.1.42
pi@rpi1:~ $ kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
rpi1 Ready master 2m3s v1.13.0 192.168.1.190 <none> Raspbian GNU/Linux 9 (stretch) 4.14.79-v7+ docker://18.6.1
rpi2 Ready <none> 85s v1.13.0 192.168.1.191 <none> Raspbian GNU/Linux 9 (stretch) 4.14.79-v7+ docker://18.6.1
pi@rpi1:~ $
Y sabiendo que la configuración k8s ha sido copiada localmente, también es posible lanzar kubectl en el puesto local (si este último está instalado).
¡Disfruta!
Este documento ha sido traducido de la versión fr a es utilizando el modelo claude-3-opus-20240229. Para obtener más información sobre el proceso de traducción, consulte https://gitlab.com/jls42/ai-powered-markdown-translator