Setting up Kallithea

Some further details to the steps mentioned in the overview.

kallithea-cli config-create my.ini http_server=waitress

kallithea-cli config-create my.ini host=8.8.8.8 "[handler_console]" formatter=color_formatter

sudo -u postgres createuser 'kallithea' --pwprompt --createdb

echo 'CREATE USER "kallithea"@"localhost" IDENTIFIED BY "password"' | sudo -u mysql mysql
echo 'GRANT ALL PRIVILEGES ON `kallithea`.* TO "kallithea"@"localhost"' | sudo -u mysql mysql

kallithea-cli db-create -c my.ini

kallithea-cli db-create -c my.ini --user=nn --password=secret --email=nn@example.com --repos=/srv/repos

sudo -u postgres createdb 'kallithea' --owner 'kallithea'
kallithea-cli db-create -c my.ini --reuse

kallithea-cli front-end-build

gearbox serve -c my.ini

Internationalization (i18n support)

The Kallithea web interface is automatically displayed in the user's preferred language, as indicated by the browser. Thus, different users may see the application in different languages. If the requested language is not available (because the translation file for that language does not yet exist or is incomplete), English is used.

If you want to disable automatic language detection and instead configure a fixed language regardless of user preference, set i18n.enabled = false and specify another language by setting i18n.lang in the Kallithea configuration file.

Using Kallithea with SSH

Kallithea supports repository access via SSH key based authentication. This means:

• repository URLs like ssh://kallithea@example.com/name/of/repository
• all network traffic for both read and write happens over the SSH protocol on port 22, without using HTTP/HTTPS nor the Kallithea WSGI application
• encryption and authentication protocols are managed by the system's sshd process, with all users using the same Kallithea system user (e.g. kallithea) when connecting to the SSH server, but with users' public keys in the Kallithea system user's .ssh/authorized_keys file granting each user sandboxed access to the repositories.
• users and admins can manage SSH public keys in the web UI
• in their SSH client configuration, users can configure how the client should control access to their SSH key - without passphrase, with passphrase, and optionally with passphrase caching in the local shell session (ssh-agent). This is standard SSH functionality, not something Kallithea provides or interferes with.
• network communication between client and server happens in a bidirectional stateful stream, and will in some cases be faster than HTTP/HTTPS with several stateless round-trips.

Users and admins can upload SSH public keys (e.g. .ssh/id_rsa.pub) through the web interface. The server's .ssh/authorized_keys file is automatically maintained with an entry for each SSH key. Each entry will tell sshd to run kallithea-cli with the ssh-serve sub-command and the right Kallithea user ID when encountering the corresponding SSH key.

To enable SSH repository access, Kallithea must be configured with the path to the .ssh/authorized_keys file for the Kallithea user, and the path to the kallithea-cli command. Put something like this in the .ini file:

ssh_enabled = true
ssh_authorized_keys = /home/kallithea/.ssh/authorized_keys
kallithea_cli_path = /srv/kallithea/venv/bin/kallithea-cli

The SSH service must be running, and the Kallithea user account must be active (not necessarily with password access, but public key access must be enabled), all file permissions must be set as sshd wants it, and authorized_keys must be writeable by the Kallithea user.

The authorized_keys file can be updated manually with kallithea-cli ssh-update-authorized-keys -c my.ini. This command is not needed in normal operation but is for example useful after changing SSH-related settings in the .ini file or renaming that file. (The path to the .ini file is used in the generated authorized_keys file).

Setting up Whoosh full text search

Kallithea provides full text search of repositories using Whoosh.

For an incremental index build, run:

kallithea-cli index-create -c my.ini

For a full index rebuild, run:

kallithea-cli index-create -c my.ini --full

The --repo-location option allows the location of the repositories to be overridden; usually, the location is retrieved from the Kallithea database.

The --index-only option can be used to limit the indexed repositories to a comma-separated list:

kallithea-cli index-create -c my.ini --index-only=vcs,kallithea

To keep your index up-to-date it is necessary to do periodic index builds; for this, it is recommended to use a crontab entry. Example:

0  3  *  *  *  /path/to/virtualenv/bin/kallithea-cli index-create -c /path/to/kallithea/my.ini

When using incremental mode (the default), Whoosh will check the last modification date of each file and add it to be reindexed if a newer file is available. The indexing daemon checks for any removed files and removes them from index.

If you want to rebuild the index from scratch, you can use the -f flag as above, or in the admin panel you can check the "build from scratch" checkbox.

Integration with issue trackers

Kallithea provides a simple integration with issue trackers. It's possible to define a regular expression that will match an issue ID in commit messages, and have that replaced with a URL to the issue.

This is achieved with following three variables in the ini file:

issue_pat = #(\d+)
issue_server_link = https://issues.example.com/{repo}/issue/\1
issue_sub =

issue_pat is the regular expression describing which strings in commit messages will be treated as issue references. The expression can/should have one or more parenthesized groups that can later be referred to in issue_server_link and issue_sub (see below). If you prefer, named groups can be used instead of simple parenthesized groups.

If the pattern should only match if it is preceded by whitespace, add the following string before the actual pattern: (?:^|(?<=\s)). If the pattern should only match if it is followed by whitespace, add the following string after the actual pattern: (?:$|(?=\s)). These expressions use lookbehind and lookahead assertions of the Python regular expression module to avoid the whitespace to be part of the actual pattern, otherwise the link text will also contain that whitespace.

Matched issue references are replaced with the link specified in issue_server_link, in which any backreferences are resolved. Backreferences can be \1, \2, ... or for named groups \g<groupname>. The special token {repo} is replaced with the full repository path (including repository groups), while token {repo_name} is replaced with the repository name (without repository groups).

The link text is determined by issue_sub, which can be a string containing backreferences to the groups specified in issue_pat. If issue_sub is empty, then the text matched by issue_pat is used verbatim.

The example settings shown above match issues in the format #<number>. This will cause the text #300 to be transformed into a link:

<a href="https://issues.example.com/example_repo/issue/300">#300</a>

The following example transforms a text starting with either of 'pullrequest', 'pull request' or 'PR', followed by an optional space, then a pound character (#) and one or more digits, into a link with the text 'PR #' followed by the digits:

issue_pat = (pullrequest|pull request|PR) ?#(\d+)
issue_server_link = https://issues.example.com/\2
issue_sub = PR #\2

The following example demonstrates how to require whitespace before the issue reference in order for it to be recognized, such that the text issue#123 will not cause a match, but issue #123 will:

issue_pat = (?:^|(?<=\s))#(\d+)
issue_server_link = https://issues.example.com/\1
issue_sub =

If needed, more than one pattern can be specified by appending a unique suffix to the variables. For example, also demonstrating the use of named groups:

issue_pat_wiki = wiki-(?P<pagename>\S+)
issue_server_link_wiki = https://wiki.example.com/\g<pagename>
issue_sub_wiki = WIKI-\g<pagename>

With these settings, wiki pages can be referenced as wiki-some-id, and every such reference will be transformed into:

<a href="https://wiki.example.com/some-id">WIKI-some-id</a>

Refer to the Python regular expression documentation for more details about the supported syntax in issue_pat, issue_server_link and issue_sub.

Hook management

Hooks can be managed in similar way to that used in .hgrc files. To manage hooks, choose Admin > Settings > Hooks.

The built-in hooks cannot be modified, though they can be enabled or disabled in the VCS section.

To add another custom hook simply fill in the first textbox with <name>.<hook_type> and the second with the hook path. Example hooks can be found in kallithea.lib.hooks.

Changing default encoding

By default, Kallithea uses UTF-8 encoding. This is configurable as default_encoding in the .ini file. This affects many parts in Kallithea including user names, filenames, and encoding of commit messages. In addition Kallithea can detect if the chardet library is installed. If chardet is detected Kallithea will fallback to it when there are encode/decode errors.

The Mercurial encoding is configurable as hgencoding. It is similar to setting the HGENCODING environment variable, but will override it.

Celery configuration

Kallithea can use the distributed task queue system Celery to run tasks like cloning repositories or sending emails.

Kallithea will in most setups work perfectly fine out of the box (without Celery), executing all tasks in the web server process. Some tasks can however take some time to run and it can be better to run such tasks asynchronously in a separate process so the web server can focus on serving web requests.

For installation and configuration of Celery, see the Celery documentation. Note that Celery requires a message broker service like RabbitMQ (recommended) or Redis.

The use of Celery is configured in the Kallithea ini configuration file. To enable it, simply set:

use_celery = true

and add or change the celery.* configuration variables.

Configuration settings are prefixed with 'celery.', so for example setting broker_url in Celery means setting celery.broker_url in the configuration file.

To start the Celery process, run:

kallithea-cli celery-run -c my.ini

Extra options to the Celery worker can be passed after -- - see -- -h for more info.

HTTPS support

Kallithea will by default generate URLs based on the WSGI environment.

Alternatively, you can use some special configuration settings to control directly which scheme/protocol Kallithea will use when generating URLs:

• With https_fixup = true, the scheme will be taken from the X-Url-Scheme, X-Forwarded-Scheme or X-Forwarded-Proto HTTP header (default http).
• With force_https = true the default will be https.
• With use_htsts = true, Kallithea will set Strict-Transport-Security when using https.

Nginx virtual host example

Sample config for Nginx using proxy:

upstream kallithea {
    server 127.0.0.1:5000;
    # add more instances for load balancing
    #server 127.0.0.1:5001;
    #server 127.0.0.1:5002;
}

## gist alias
server {
   listen          443;
   server_name     gist.example.com;
   access_log      /var/log/nginx/gist.access.log;
   error_log       /var/log/nginx/gist.error.log;

   ssl on;
   ssl_certificate     gist.your.kallithea.server.crt;
   ssl_certificate_key gist.your.kallithea.server.key;

   ssl_session_timeout 5m;

   ssl_protocols SSLv3 TLSv1;
   ssl_ciphers DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:EDH-RSA-DES-CBC3-SHA:AES256-SHA:DES-CBC3-SHA:AES128-SHA:RC4-SHA:RC4-MD5;
   ssl_prefer_server_ciphers on;

   rewrite ^/(.+)$ https://kallithea.example.com/_admin/gists/$1;
   rewrite (.*)    https://kallithea.example.com/_admin/gists;
}

server {
   listen          443;
   server_name     kallithea.example.com
   access_log      /var/log/nginx/kallithea.access.log;
   error_log       /var/log/nginx/kallithea.error.log;

   ssl on;
   ssl_certificate     your.kallithea.server.crt;
   ssl_certificate_key your.kallithea.server.key;

   ssl_session_timeout 5m;

   ssl_protocols SSLv3 TLSv1;
   ssl_ciphers DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:EDH-RSA-DES-CBC3-SHA:AES256-SHA:DES-CBC3-SHA:AES128-SHA:RC4-SHA:RC4-MD5;
   ssl_prefer_server_ciphers on;

   ## uncomment root directive if you want to serve static files by nginx
   ## requires static_files = false in .ini file
   #root /srv/kallithea/kallithea/kallithea/public;
   include         /etc/nginx/proxy.conf;
   location / {
        try_files $uri @kallithea;
   }

   location @kallithea {
        proxy_pass      http://127.0.0.1:5000;
   }

}

Here's the proxy.conf. It's tuned so it will not timeout on long pushes or large pushes:

proxy_redirect              off;
proxy_set_header            Host $host;
## needed for container auth
#proxy_set_header            REMOTE_USER $remote_user;
#proxy_set_header            X-Forwarded-User $remote_user;
proxy_set_header            X-Url-Scheme $scheme;
proxy_set_header            X-Host $http_host;
proxy_set_header            X-Real-IP $remote_addr;
proxy_set_header            X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header            Proxy-host $proxy_host;
proxy_buffering             off;
proxy_connect_timeout       7200;
proxy_send_timeout          7200;
proxy_read_timeout          7200;
proxy_buffers               8 32k;
client_max_body_size        1024m;
client_body_buffer_size     128k;
large_client_header_buffers 8 64k;

Apache virtual host reverse proxy example

Here is a sample configuration file for Apache using proxy:

<VirtualHost *:80>
        ServerName kallithea.example.com

        <Proxy *>
          # For Apache 2.4 and later:
          Require all granted

          # For Apache 2.2 and earlier, instead use:
          # Order allow,deny
          # Allow from all
        </Proxy>

        #important !
        #Directive to properly generate url (clone url) for Kallithea
        ProxyPreserveHost On

        #kallithea instance
        ProxyPass / http://127.0.0.1:5000/
        ProxyPassReverse / http://127.0.0.1:5000/

        #to enable https use line below
        #SetEnvIf X-Url-Scheme https HTTPS=1
</VirtualHost>

Additional tutorial http://pylonsbook.com/en/1.1/deployment.html#using-apache-to-proxy-requests-to-pylons

Apache as subdirectory

Apache subdirectory part:

<Location /PREFIX >
  ProxyPass http://127.0.0.1:5000/PREFIX
  ProxyPassReverse http://127.0.0.1:5000/PREFIX
  SetEnvIf X-Url-Scheme https HTTPS=1
</Location>

Besides the regular apache setup you will need to add the following line into [app:main] section of your .ini file:

filter-with = proxy-prefix

Add the following at the end of the .ini file:

[filter:proxy-prefix]
use = egg:PasteDeploy#prefix
prefix = /PREFIX

then change PREFIX into your chosen prefix

Apache with mod_wsgi

Alternatively, Kallithea can be set up with Apache under mod_wsgi. For that, you'll need to:

• Install mod_wsgi. If using a Debian-based distro, you can install the package libapache2-mod-wsgi:

  aptitude install libapache2-mod-wsgi
  

• Enable mod_wsgi:

  a2enmod wsgi
  

• Add global Apache configuration to tell mod_wsgi that Python only will be used in the WSGI processes and shouldn't be initialized in the Apache processes:

  WSGIRestrictEmbedded On
  

• Create a WSGI dispatch script, like the one below. Make sure you check that the paths correctly point to where you installed Kallithea and its Python Virtual Environment.

  import os
  os.environ['PYTHON_EGG_CACHE'] = '/srv/kallithea/.egg-cache'
  
  # sometimes it's needed to set the current dir
  os.chdir('/srv/kallithea/')
  
  import site
  site.addsitedir("/srv/kallithea/venv/lib/python3.7/site-packages")
  
  ini = '/srv/kallithea/my.ini'
  from logging.config import fileConfig
  fileConfig(ini, {'__file__': ini, 'here': '/srv/kallithea'})
  from paste.deploy import loadapp
  application = loadapp('config:' + ini)
  

  Or using proper virtualenv activation:

  activate_this = '/srv/kallithea/venv/bin/activate_this.py'
  execfile(activate_this, dict(__file__=activate_this))
  
  import os
  os.environ['HOME'] = '/srv/kallithea'
  
  ini = '/srv/kallithea/kallithea.ini'
  from logging.config import fileConfig
  fileConfig(ini, {'__file__': ini, 'here': '/srv/kallithea'})
  from paste.deploy import loadapp
  application = loadapp('config:' + ini)
  

• Add the necessary WSGI* directives to the Apache Virtual Host configuration file, like in the example below. Notice that the WSGI dispatch script created above is referred to with the WSGIScriptAlias directive. The default locale settings Apache provides for web services are often not adequate, with C as the default language and ASCII as the encoding. Instead, use the lang parameter of WSGIDaemonProcess to specify a suitable locale. See also the :ref:`overview` section and the WSGIDaemonProcess documentation.

  Apache will by default run as a special Apache user, on Linux systems usually www-data or apache. If you need to have the repositories directory owned by a different user, use the user and group options to WSGIDaemonProcess to set the name of the user and group.

  Once again, check that all paths are correctly specified.

  WSGIDaemonProcess kallithea processes=5 threads=1 maximum-requests=100 \
      python-home=/srv/kallithea/venv lang=C.UTF-8
  WSGIProcessGroup kallithea
  WSGIScriptAlias / /srv/kallithea/dispatch.wsgi
  WSGIPassAuthorization On
  

  Or if using a dispatcher WSGI script with proper virtualenv activation:

  WSGIDaemonProcess kallithea processes=5 threads=1 maximum-requests=100 lang=en_US.utf8
  WSGIProcessGroup kallithea
  WSGIScriptAlias / /srv/kallithea/dispatch.wsgi
  WSGIPassAuthorization On
  

Other configuration files

A number of example init.d scripts can be found in the init.d directory of the Kallithea source.