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128 lines
3.9 KiB
ReStructuredText
128 lines
3.9 KiB
ReStructuredText
.. _playbooks_environment:
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Setting the Environment (and Working With Proxies)
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==================================================
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.. versionadded:: 1.1
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It is quite possible that you may need to get package updates through a proxy, or even get some package
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updates through a proxy and access other packages not through a proxy. Or maybe a script you might wish to
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call may also need certain environment variables set to run properly.
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Ansible makes it easy for you to configure the remote execution environment by using the 'environment' keyword. Here is an example::
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- hosts: all
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remote_user: root
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tasks:
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- apt: name=cobbler state=installed
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environment:
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http_proxy: http://proxy.example.com:8080
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The environment can also be stored in a variable, and accessed like so::
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- hosts: all
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remote_user: root
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# here we make a variable named "proxy_env" that is a dictionary
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vars:
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proxy_env:
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http_proxy: http://proxy.example.com:8080
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tasks:
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- apt: name=cobbler state=installed
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environment: "{{proxy_env}}"
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You can also use it at a play level::
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- hosts: testhost
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roles:
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- php
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- nginx
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environment:
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http_proxy: http://proxy.example.com:8080
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While just proxy settings were shown above, any number of settings can be supplied. The most logical place
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to define an environment hash might be a group_vars file, like so::
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---
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# file: group_vars/boston
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ntp_server: ntp.bos.example.com
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backup: bak.bos.example.com
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proxy_env:
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http_proxy: http://proxy.bos.example.com:8080
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https_proxy: http://proxy.bos.example.com:8080
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Working With Language-Specific Version Managers
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===============================================
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Some language-specific version managers (such as rbenv and nvm) require environment variables be set while these tools are in use. When using these tools manually, they usually require sourcing some environment variables via a script or lines added to your shell configuration file. In Ansible, you can instead use the environment directive::
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---
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### A playbook demonstrating a common npm workflow:
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# - Check for package.json in the application directory
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# - If package.json exists:
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# * Run npm prune
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# * Run npm install
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- hosts: application
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become: false
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vars:
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node_app_dir: /var/local/my_node_app
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environment:
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NVM_DIR: /var/local/nvm
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PATH: /var/local/nvm/versions/node/v4.2.1/bin:{{ ansible_env.PATH }}
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tasks:
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- name: check for package.json
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stat:
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path: '{{ node_app_dir }}/package.json'
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register: packagejson
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- name: npm prune
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command: npm prune
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args:
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chdir: '{{ node_app_dir }}'
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when: packagejson.stat.exists
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- name: npm install
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npm:
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path: '{{ node_app_dir }}'
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when: packagejson.stat.exists
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You might also want to simply specify the environment for a single task::
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---
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- name: install ruby 2.3.1
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command: rbenv install {{ rbenv_ruby_version }}
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args:
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creates: '{{ rbenv_root }}/versions/{{ rbenv_ruby_version }}/bin/ruby'
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vars:
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rbenv_root: /usr/local/rbenv
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rbenv_ruby_version: 2.3.1
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environment:
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CONFIGURE_OPTS: '--disable-install-doc'
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RBENV_ROOT: '{{ rbenv_root }}'
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PATH: '{{ rbenv_root }}/bin:{{ rbenv_root }}/shims:{{ rbenv_plugins }}/ruby-build/bin:{{ ansible_env.PATH }}'
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.. note::
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``environment:`` does not affect Ansible itself, ONLY the context of the specific task action and this does not include Ansible's own configuration settings.
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.. seealso::
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:doc:`playbooks`
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An introduction to playbooks
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`User Mailing List <https://groups.google.com/group/ansible-devel>`_
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Have a question? Stop by the google group!
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`irc.freenode.net <http://irc.freenode.net>`_
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#ansible IRC chat channel
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