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Fix incorrect import.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 08 Jul 2017 19:59:36 -0700
parents dcaa41b39c23
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1 ---
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2 title: Deployment
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3 icon: server
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4 header_img: wizard.png
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5 ---
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6
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7 Wikked runs by default with an "easy" configuration, _i.e._ something that will
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8 "just work" when you play around locally. In this default setup, it uses
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9 [SQLite][] for the cache, and [Whoosh][] for the full-text search, all running
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10 in Flask's built-in server.
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11
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12 [whoosh]: https://bitbucket.org/mchaput/whoosh/wiki/Home
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13 [sqlite]: https://sqlite.org/
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14
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15 This technology stack works very well for running your wiki locally, or for
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16 private websites. It has some limitations, however:
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17
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18 * The `wk runserver` command runs the Flask development server, which you
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19 [shouldn't use in production][flaskdeploy]. You'll probably need to run Wikked
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20 inside a proper server instead.
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21 * When a page has been edited, Wikked will immediately evaluate and reformat all
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22 pages that have a dependency on it. You probably want to have this done in the
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23 background instead.
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24
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25 In this chapter we'll therefore look at deployment options, and follow-up with
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26 some more advanced configurations for those with special requirements.
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27
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28 [flaskdeploy]: http://flask.pocoo.org/docs/deploying/
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29
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30
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31 ## Public facing wiki
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32
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33 A simple way to run Wikked on a production server (_i.e._ a server accessible
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34 from the internet) is to use [Apache][] with [`mod_wsgi`][wsgi]. For a proper
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35 introduction to the matter, you can see [Flask's documentation on the
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36 subject][flask_wsgi]. Otherwise, you can probably reuse the following examples.
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37
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38 [apache]: https://httpd.apache.org/
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39 [wsgi]: http://code.google.com/p/modwsgi/
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40 [flask_wsgi]: http://flask.pocoo.org/docs/deploying/mod_wsgi/
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41
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42 The first thing is to create a `.wsgi` file somewhere on your server. You only
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43 need to create the Wikked WSGI app in it, and optionally activate your
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44 `virtualenv` if you're using that:
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45
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46 # Activate your virtualenv
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47 activate_this = '/path/to/venv/bin/activate_this.py'
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48 execfile(activate_this, dict(__file__=activate_this))
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49
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50 # Get the Wikked WSGI app
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51 from wikked.wsgiutil import get_wsgi_app
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52 application = get_wsgi_app('/path/to/your/wiki/root')
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53
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54 The second thing to do is to add a new virtual host to your Apache
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55 configuration. The [Flask documentation][flask_wsgi] shows an example that you
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56 should be able to use directly, although you'll also need to tell Apache where
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57 to serve some static files: Wikked's static files (Javascript, CSS, icons,
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58 etc.), and your own wiki's files (your pictures and other attachments). This
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59 means your Apache configuration will look like this in the end:
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60
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61 <VirtualHost *:80>
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62 ServerName yourwikidomain.com
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63
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64 WSGIDaemonProcess yourwiki user=user1 group=group1 threads=5
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65 WSGIScriptAlias / /path/to/your/wsgi/file.wsgi
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66
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67 DocumentRoot /path/to/your/wiki/_files
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68 Alias /static/ /path/to/wikked/static/
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69
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70 <Directory /path/to/your/wiki>
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71 WSGIProcessGroup yourwiki
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72 WSGIApplicationGroup %{GLOBAL}
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73 Order deny,allow
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74 Allow from all
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75 </Directory>
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76 </VirtualHost>
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77
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78 > You will have to create the `_files` directory in your wiki before
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79 > reloading Apache, otherwise it may complain about it.
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80 >
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81 > Also, the path to Wikked's `static` directory is going to point directly into
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82 > your installed Wikked package. So if you installed it with `virtualenv`, it
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83 > would be something like:
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84 > `/path/to/your/wiki/venv/lib/python/site-packages/wikked/static`.
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85
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86
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87 ## Advanced configurations
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88
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89 ### Background updates
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90
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91 By default, when you edit a page, Wikked will invalidate any page with a query
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92 in it. That page will be re-computed the next time you visit it. But this may
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93 not work very well if you have a lot of queries. As an alternative, Wikked can
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94 run background updates.
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95
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96 First you enable background updates in the `get_wsgi_app` function from the previous
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97 section. You just need to pass `async_update=True`.
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98
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99 > If you want to use background updates locally, you can do `wk runserver
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100 > --usetasks`.
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101
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102 Now, you'll need to run a separate process that, well, runs those updates in the
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103 background. To do this:
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104
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105 cd /path/to/my/wiki
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106 wk runtasks
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107
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108 > The background task handling is done with [Celery][]. By default, Wikked will
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109 > use the [SQLAlchemy transport][celerysqlite].
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110
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111 [celery]: http://www.celeryproject.org/
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112 [celerysqlite]: http://docs.celeryproject.org/en/latest/getting-started/brokers/sqlalchemy.html
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113
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114
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115 ### Backend options
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116
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117 If you want to use a different storage than SQLite, set the `database_url`
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118 setting in your `wikirc` to an [SQLAlchemy-supported database URL][SQLAlchemy].
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119 For instance, if you're using MySQL with `pymsql` installed:
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120
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121 [wiki]
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122 database_url=mysql+pymysql://username:password123@localhost/db_name
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123
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124 [sqlalchemy]: http://docs.sqlalchemy.org/en/rel_0_9/core/engines.html#database-urls
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125
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126 > Note that you'll have to install the appropriate SQL layer. For instance: `pip
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127 > install pymsql`. You will also obviously need to setup and configure your SQL
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128 > server.
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129
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130
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131 If Whoosh is also not suited to your needs, you can use [Elastic
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132 Search][elastic] instead:
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133
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134 [wiki]
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135 indexer=elastic
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136
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137 You'll obviously have to install and run Elastic Search.
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138
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139 [elastic]: http://www.elasticsearch.org/
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140