Diferencias

Muestra las diferencias entre dos versiones de la página.

--- wiki2:ansible [2018/12/27 14:17]
alfred [Playbooks]
+++ wiki2:ansible [2020/05/09 09:25] (actual)
@@ Línea 58: / Línea 58: @@
   * ''-m <module>'' exec that module.
   * ''-a '<arguments>' '' arguments for the module
-=== shell ===
-<code>
-ansible all -b -m shell -a 'apt-get install nginx'
-</code>
 === apt ===
@@ Línea 86: / Línea 81: @@
     - htop
     - tmux
+</code>
+=== copy ===
+<code>
+- copy:
+    src: "{{ item }}"
+    dest: /etc/fooapp/
+    owner: root
+    mode: 600
+  with_fileglob:
+    - /playbooks/files/fooapp/*
+</code>
+<code>
+- name: Your copy task
+  copy: src={{ item.src }} dest={{ item.dest }}
+  with_items:
+    - { src: 'containerizers', dest: '/etc/mesos/containerizers' }
+    - { src: 'another_file', dest: '/etc/somewhere' }
+    - { src: 'dynamic', dest: '{{ var_path }}' }
+</code>
+<code>
+- name: Copy multiple files to multiple directories
+  copy: src={{ item.0 }} dest={{ item.1 }}
+  with_together:
+    - [ 'file1', 'file2', 'file3' ]
+    - [ '/dir1/', '/dir2/', '/dir3/' ]
+</code>
+=== shell ===
+<code>
+ansible all -b -m shell -a 'apt-get install nginx'
 </code>
 ==== Playbooks ====
@@ Línea 157: / Línea 186: @@
 </code>
+The right one would be:
+<code>
+vars:
+   age_path: "{{vivek.name}}/demo/"
+</code>
 ==== Roles ====
 It's like a playbook but divided in several directories and files, each one with a file ''main.yml''. In those files we can add whatever is required into that role:
@@ Línea 196: / Línea 230: @@
 Ansible facts all start with ''ansible_'' and are globally available for use any place variables can be used: Variable files, Tasks, and Templates.
+To access all the facts:
+<code>
+ansible hostname -m setup
+</code>
+Then:
+<code>
+{{ ansible_facts["eth0"]["ipv4"]["address"] }}
+</code>
+OR alternatively:
+<code>
+{{ ansible_facts.eth0.ipv4.address }}
+</code>
+You can disable facts:
+<code>
+- hosts: whatever
+  gather_facts: no
+</code>
 ==== Vaults ====
@@ Línea 204: / Línea 256: @@
 ===== Tips and tricks =====
+==== Become ====
+<code>
+---
+- hosts: webservers
+  remote_user: yourname
+  become: yes
+  become_user: postgres
+</code>
+You can also use other privilege escalation methods, like su:
+<code>
+---
+- hosts: webservers
+  remote_user: yourname
+  become: yes
+  become_method: su
+</code>
 ==== Ansible command ====
@@ Línea 228: / Línea 296: @@
  ansible -m command -a "ls" all
 </code>
+==== Environment variables ====
+For using local environment variables:
+<code>
+- debug: msg="{{ lookup('env','HOME') }} is an environment variable"
+</code>
+In this way you can set variables:
+<code>
+- hosts: all
+  vars:
+    local_shell:  "{{ lookup('env','SHELL') }}"
+  tasks:
+    - debug:
+        msg: "{{ local_shell }}"
+output
+------
+"msg": "/bin/sh"
+</code>
+=== For targetting proxies ===
+<code>
+- hosts: all
+  remote_user: root
+  tasks:
+    - apt: name=cobbler state=installed
+      environment:
+        http_proxy: http://proxy.example.com:8080
+</code>
+The environment can also be stored in a variable, and accessed like so:
+<code>
+- hosts: all
+  remote_user: root
+  # here we make a variable named "proxy_env" that is a dictionary
+  vars:
+    proxy_env:
+      http_proxy: http://proxy.example.com:8080
+  tasks:
+    - apt: name=cobbler state=installed
+      environment: "{{proxy_env}}"
+</code>
+You can also use it at a play level:
+<code>
+- hosts: testhost
+  roles:
+     - php
+     - nginx
+  environment:
+    http_proxy: http://proxy.example.com:8080
+</code>
+==== Passing variables on the command line ====
+In addition to vars_prompt and vars_files, it is possible to set variables at the command line using the ''<nowiki>--extra-vars</nowiki>'' (or -e) argument.
+<code>
+ansible-playbook release.yml --extra-vars "version=1.23.45 other_variable=foo"
+</code>
+It also allows to set in JSON format:
+<code>
+ansible-playbook release.yml --extra-vars '{"version":"1.23.45","other_variable":"foo"}'
+ansible-playbook arcade.yml --extra-vars '{"pacman":"mrs","ghosts":["inky","pinky","clyde","sue"]}'
+</code>
+Also in YAML string format:
+<code>
+ansible-playbook release.yml --extra-vars '
+version: "1.23.45"
+other_variable: foo'
+ansible-playbook arcade.yml --extra-vars '
+pacman: mrs
+ghosts:
+- inky
+- pinky
+- clyde
+- sue'
+</code>
+Even vars from a JSON or YAML file:
+<code>
+ansible-playbook release.yml --extra-vars "@some_file.json"
+</code>
+==== Executing locally ====
+''local_action'' is an alternative way of doing ''delegate_to: localhost''.
 ==== Troubleshooting ====
-=== Use modules 'debug' and 'register' ===
+Yaml does not support tab based indentation and supports space based indentation, so one needs to be careful about the same.
+**Use verbose mode** with ansible command parameters ''-v'' ''-vv''.
+**Use modules 'debug' and 'register'**
+==== Notes ====
+  * [[https://medium.com/@denot/ansible-101-d6dc9f86df0a|Ansible 101]]
+=== Inventory variables ===
+<code>
+[localhost]
+.0.0.1 variable1=value1 variable2=value2
+[webservers]
+webserver.awesomecompany.ly ansible_ssh_host=55.44.33.22
+</code>
+=== Split a command ===
+You can split this...
+<code>
+  - name: Find geographical region of this server
+    local_action: uri url=http://locator/studio/{{ ansible_default_ipv4.address}} method=GET return_content=yes register=locator_output
+</code>
+... in this:
+<code>
+- name: Find geographical region of this server
+  uri:
+    url: http://locator/studio/{{ ansible_default_ipv4.address}}
+    method: GET
+    return_content: yes
+  register: locator_output
+  delegate_to: localhost
+</code>
 ===== Playbooks examples =====
+  * https://github.com/ansible/ansible-examples
 <code>
@@ Línea 283: / Línea 473: @@
    service:
       name: <your service name>
+</code>
+Setting the become and hosts in the header:
+<code>
+---
+- name: Install nginx
+  hosts: host.name.ip
+  become: true
+  tasks:
+  - name: Add epel-release repo
+    yum:
+      name: epel-release
+      state: present
+  - name: Install nginx
+    yum:
+      name: nginx
+      state: present
+  - name: Insert Index Page
+    template:
+      src: index.html
+      dest: /usr/share/nginx/html/index.html
+  - name: Start NGiNX
+    service:
+      name: nginx
+      state: started
+</code>
+Multiple plays:
+<code>
+---
+- hosts: webservers
+  remote_user: root
+  tasks:
+  - name: ensure apache is at the latest version
+    yum:
+      name: httpd
+      state: latest
+  - name: write the apache config file
+    template:
+      src: /srv/httpd.j2
+      dest: /etc/httpd.conf
+- hosts: databases
+  remote_user: root
+  tasks:
+  - name: ensure postgresql is at the latest version
+    yum:
+      name: postgresql
+      state: latest
+  - name: ensure that postgresql is started
+    service:
+      name: postgresql
+      state: started
+</code>
+A right one:
+<code>
+---
+- hosts: puma
+  gather_facts: no
+  become: yes
+  name: Deploy PUMA
+  tasks:
+  - name: Send Docker images
+    debug: msg="hola"
+  - name: Load Docker images
+    debug: msg="{{ lookup('env','HOME') }} is an environment variable"
+  - name: Start PUMA
+    debug: msg="{{ lookup('env','HOME') }} is an environment variable"
+#    copy:
+#     src: "{{ item }}"
+#     dest: ~
+#     owner: root
+#     mode: 600
+#    with_fileglob:
+#     - ../dist/*
 </code>

Programming

Herramientas de usuario

Herramientas del sitio

Diferencias

Herramientas de la página