OMERO Web

Installs and configures OMERO.web and Nginx. Uses a conf.d style configuration directory for managing the OMERO.web configuration.

Warning: Python 2 support is dropped. See CHANGES.md for details.

Role Variables

All variables are optional, see defaults/main.yml for the full list

OMERO.web version and installation.

• omero_web_release: The OMERO.web release, e.g. 5.9.1. The default is present which will install the latest version if web is not already installed, but will not modify an existing web. Use latest to automatically upgrade when a new version is released.
• omero_web_system_user: OMERO.web system user, default omero-web.
• omero_web_system_uid: OMERO.web system user ID (default automatic)

OMERO.web configuration.

• omero_web_config_set: A dictionary of config-key: value which will be used for the initial OMERO.web configuration, default empty. value can be a string, or an object (list, dictionary) that will be automatically converted to quoted JSON. Note configuration can also be done pre/post installation using the web/config conf.d style directory.
• omero_web_setup_nginx: Install and configure Nginx, default True.

OMERO.web systemd configuration

• omero_web_systemd_setup: Create and start the omero-web systemd service, default True
• omero_web_systemd_limit_nofile: Systemd limit for number of open files (default ignore)
• omero_web_systemd_after: A list of strings with additional service names to appear in systemd unit file "After" statements. Default empty/none.
• omero_web_systemd_requires: A list of strings with additional service names to appear in systemd unit file "Requires" statements. Default empty/none.

Python 3 only parameters.

• omero_web_python_addons: List of additional Python packages to be installed into virtualenv

The omero-web-apps role has been merged into this role for Python 3 deployments. All variables are optional:

• omero_web_apps_names: List of web application names to be appended to omero.web.apps
• omero_web_apps_packages: List of pip installable packages
• omero_web_apps_top_links: Lists of top link dictionaries to be appended to omero.web.ui.top_links, of the form:
  • label: Label
  • link: URL or a dict
  • attrs: Dictionary of attributes (optional)
• omero_web_apps_ui_metadata_panes: Items to be appended to omero.web.ui.metadata_panes
• omero_web_apps_config_append: Dictionary of other key-[list of values] pairs to be appended (multiple values can be appended to the same key)
• omero_web_apps_config_set: Dictionary of other key-value pairs to be set
• omero_web_apps_config_name: The basename of the configuration file (web/config/{{ omero_web_apps_config_name }}.omero)

Unstable features

Variables :

• omero_web_systemd_start: Automatically enable and start/restart systemd omero-web service, default True. This is intended for use in server images where installation may be separate from configuration and execution.
• omero_web_always_reset_config: Clear the existing configuration before regenerating, default True.

It should be safe to use this role to deploy OMERO.web inside a standard centos:7 Docker container without systemd (omero_web_systemd_setup: False).

Configuring OMERO.web

This role regenerates the OMERO.web configuration file using the configuration files and helper script in /opt/omero/web/config. omero_web_config_set can be used for simple configurations, for anything more complex consider creating one or more configuration files under: /opt/omero/web/config/ with the extension .omero.

Manual configuration changes (omero config ...) will be lost following a restart of omero-web with systemd, you can disable this by setting omero_web_always_reset_config: False. Manual configuration changes will never be copied during an upgrade.

See ome/design#70 for a proposal to add support for a conf.d style directory directly into OMERO.

Example Playbooks

OMERO.web with the default backend server, localhost:4064:

- hosts: localhost
  roles:
    - role: ome.omero_web

OMERO.web with a custom configuration using omero_web_config_set:

- hosts: localhost
  roles:
    - role: ome.omero_web
      omero_web_config_set:
        omero.web.server_list:
          - [omero.example.org, 4064, omero-example]
        omero.web.public.enabled: True
        omero.web.public.server_id: 1
        omero.web.public.user: public
        omero.web.public.password: secret-password

OMERO.web with the redis session engine

hosts: localhost    
roles:
- role: ome.omero_web
  omero_web_setup_redis_session: true
  omero_web_config_set:
    "omero.web.caches":
       "default": 
          "BACKEND": "django_redis.cache.RedisCache"
          "LOCATION": "redis://127.0.0.1:6379/0"
    "omero.web.session_engine": "django.contrib.sessions.backends.cache"

OMERO.web with a custom configuration using a configuration file web-custom-config.omero:

- hosts: localhost
  roles:
    - role: ome.omero_web
  tasks:
    - copy:
        content: >
          config set omero.web.server_list '[["omero.example.org", 4064, "omero-example"]'
        dest: /opt/omero/web/config/web-custom-config.omero
      notify:
        - restart omero-web

Author Information

ome-devel@lists.openmicroscopy.org.uk