我在使用 Ansible Playbook 部署 Docker Swarm 时遇到了问题。
这是我的主机文件：
---
all:
hosts:
ansible01:
connection: local
children:
docker_swarm_manager_init:
hosts:
manager01:
ansible_host: 10.4.0.5
docker_swarm_managers:
hosts:
manager02:
ansible_host: 10.4.0.4
manager03:
ansible_host: 10.4.0.6
children:
docker_swarm_manager_init:
docker_swarm_workers:
hosts:
worker01:
ansible_host: 10.4.0.7
worker02:
ansible_host: 10.4.0.3
docker:
children:
docker_swarm_managers:
docker_swarm_workers:
vars:
这是角色“docker_swarm”：
---
- name: Init the Docker Swarm
docker_swarm:
advertise_addr: "{{ docker_swarm_advertise_address }}"
state: present
register: docker_swarm_init
notify: Set the join tokens as an Ansible fact
when: docker_swarm_role == 'init'
- name: Join "{{ docker_swarm_role }}" nodes to the Docker Swarm
docker_swarm:
remote_addrs: [ "{{ docker_swarm_remote_address }}" ]
advertise_addr: "{{ docker_swarm_advertise_address }}"
join_token: "{{ docker_swarm_join_token }}"
state: join
when: docker_swarm_role != 'init'
这是我正在使用的剧本：
---
# Install Docker Engine (CE) on all Docker hosts
- hosts: docker
roles:
- docker_engine
# Init the Docker Swarm only on the first manager
- hosts: docker_swarm_manager_init
roles:
- role: docker_swarm
vars:
docker_swarm_role: init
docker_swarm_advertise_address: "{{ ansible_all_ipv4_addresses | ipaddr('10.0.0.0/8') | first }}"
# Join all manager nodes to the Swarm
- hosts: docker_swarm_managers
roles:
- role: docker_swarm
vars:
docker_swarm_role: manager
docker_swarm_join_token: "{{ hostvars['docker_swarm_manager_init[0]']['docker_swarm_init']['swarm_facts']['JoinTokens']['Manager'] }}"
docker_swarm_remote_address: "{{ hostvars['docker_swarm_manager_init[0]']['ansible_all_ipv4_addresses'] | ipaddr('10.0.0.0/8') | first }}"
docker_swarm_advertise_address: "{{ ansible_all_ipv4_addresses | ipaddr('10.0.0.0/8') | first }}"
# Join all worker nodes to the Swarm
- hosts: docker_swarm_workers
roles:
- role: docker_swarm
vars:
docker_swarm_role: worker
docker_swarm_join_token: "{{ hostvars['docker_swarm_manager_init[0]']['docker_swarm_init']['swarm_facts']['JoinTokens']['Worker'] }}"
docker_swarm_remote_address: "{{ hostvars['docker_swarm_manager_init[0]']['ansible_all_ipv4_addresses'] | ipaddr('10.0.0.0/8') | first }}"
docker_swarm_advertise_address: "{{ ansible_all_ipv4_addresses | ipaddr('10.0.0.0/8') | first }}"
当我运行剧本时出现以下错误：
PLAY [docker] ***************************************************************************************************************************************************************************************************************************************************************
TASK [Gathering Facts] ******************************************************************************************************************************************************************************************************************************************************
ok: [manager02]
ok: [worker02]
ok: [manager03]
ok: [worker01]
ok: [manager01]
TASK [docker_engine : Add Docker GPG key] ***********************************************************************************************************************************************************************************************************************************
ok: [manager02]
ok: [worker02]
ok: [manager03]
ok: [manager01]
ok: [worker01]
TASK [docker_engine : Add Docker APT repository] ****************************************************************************************************************************************************************************************************************************
ok: [manager02]
ok: [worker02]
ok: [manager01]
ok: [manager03]
ok: [worker01]
TASK [docker_engine : Install Docker (CE) & requirements] *******************************************************************************************************************************************************************************************************************
ok: [worker02]
ok: [manager02]
ok: [manager01]
ok: [worker01]
ok: [manager03]
PLAY [docker_swarm_manager_init] ********************************************************************************************************************************************************************************************************************************************
TASK [Gathering Facts] ******************************************************************************************************************************************************************************************************************************************************
ok: [manager01]
TASK [docker_swarm : Init the Docker Swarm] *********************************************************************************************************************************************************************************************************************************
ok: [manager01]
TASK [docker_swarm : Join "init" nodes to the Docker Swarm] *****************************************************************************************************************************************************************************************************************
skipping: [manager01]
PLAY [docker_swarm_managers] ************************************************************************************************************************************************************************************************************************************************
TASK [Gathering Facts] ******************************************************************************************************************************************************************************************************************************************************
ok: [manager02]
ok: [manager03]
ok: [manager01]
TASK [docker_swarm : Init the Docker Swarm] *********************************************************************************************************************************************************************************************************************************
skipping: [manager02]
skipping: [manager03]
skipping: [manager01]
TASK [docker_swarm : Join "manager" nodes to the Docker Swarm] **************************************************************************************************************************************************************************************************************
fatal: [manager02]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: \"hostvars['docker_swarm_manager_init[0]']\" is undefined\n\nThe error appears to be in '/root/ansible_structured/roles/docker_swarm/tasks/main.yml': line 10, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Join \"{{ docker_swarm_role }}\" nodes to the Docker Swarm\n ^ here\nWe could be wrong, but this one looks like it might be an issue with\nmissing quotes. Always quote template expression brackets when they\nstart a value. For instance:\n\n with_items:\n - {{ foo }}\n\nShould be written as:\n\n with_items:\n - \"{{ foo }}\"\n"}
fatal: [manager03]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: \"hostvars['docker_swarm_manager_init[0]']\" is undefined\n\nThe error appears to be in '/root/ansible_structured/roles/docker_swarm/tasks/main.yml': line 10, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Join \"{{ docker_swarm_role }}\" nodes to the Docker Swarm\n ^ here\nWe could be wrong, but this one looks like it might be an issue with\nmissing quotes. Always quote template expression brackets when they\nstart a value. For instance:\n\n with_items:\n - {{ foo }}\n\nShould be written as:\n\n with_items:\n - \"{{ foo }}\"\n"}
fatal: [manager01]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: \"hostvars['docker_swarm_manager_init[0]']\" is undefined\n\nThe error appears to be in '/root/ansible_structured/roles/docker_swarm/tasks/main.yml': line 10, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Join \"{{ docker_swarm_role }}\" nodes to the Docker Swarm\n ^ here\nWe could be wrong, but this one looks like it might be an issue with\nmissing quotes. Always quote template expression brackets when they\nstart a value. For instance:\n\n with_items:\n - {{ foo }}\n\nShould be written as:\n\n with_items:\n - \"{{ foo }}\"\n"}
PLAY RECAP ******************************************************************************************************************************************************************************************************************************************************************
manager01 : ok=7 changed=0 unreachable=0 failed=1 skipped=2 rescued=0 ignored=0
manager02 : ok=5 changed=0 unreachable=0 failed=1 skipped=1 rescued=0 ignored=0
manager03 : ok=5 changed=0 unreachable=0 failed=1 skipped=1 rescued=0 ignored=0
worker01 : ok=4 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
worker02 : ok=4 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
我对这个引文进行了很多尝试，但似乎没有什么效果......
我希望让角色尽可能通用，以提高可重用性。这就是为什么我想将主机变量作为变量传递给角色。
谢谢！
答案1
尝试下面的替换
- role: docker_swarm
vars:
docker_swarm_role: manager
docker_swarm_manager_init_0: "{{ groups['docker_swarm_manager_init'] | first }}"
docker_swarm_join_token: "{{ hostvars[docker_swarm_manager_init_0]...
（未经测试）
笔记
docker_swarm_manager_init库存中有两组