Realms in Zulip
Zulip allows multiple realms to be hosted on a single instance. Realms are the Zulip codebase’s internal name for what we refer to in user-facing documentation as an organization (the name “realm” comes from Kerberos).
Wherever possible, we avoid using the term realm
in any user-facing
string or documentation; “Organization” is the equivalent term used in
those contexts (and we have linters that attempt to enforce this rule
in translatable strings). We may in the future modify Zulip’s
internals to use organization
instead.
The production docs on multiple realms are also relevant reading.
Creating realms
There are two main methods for creating realms.
Using unique link generator
Enabling open realm creation
Using unique link generator
./manage.py generate_realm_creation_link
The above command will output a URL which can be used for creating a
new realm and an administrator user for that realm. The link expires
after the creation of the realm. The link also expires if not used
within 7 days. The expiration period can be changed by modifying
REALM_CREATION_LINK_VALIDITY_DAYS
in settings.py.
Subdomains
One can host multiple realms in a Zulip server by giving each realm a unique subdomain of the main Zulip server’s domain. For example, if the Zulip instance is hosted at zulip.example.com, and the subdomain of your organization is acme you can would acme.zulip.example.com for accessing the organization.
For subdomains to work properly, you also have to change your DNS
records so that the subdomains point to your Zulip installation IP. An
A
record with host name value *
pointing to your IP should do the
job.
We also recommend upgrading to at least Zulip 1.7, since older Zulip releases had much less nice handling for subdomains. See our docs on using subdomains for user-facing documentation on this.
Working with subdomains in development environment
Zulip’s development environment is designed to make it convenient to test the various Zulip configurations for different subdomains:
Realms are subdomains on
*.zulipdev.com
, just like*.zulipchat.com
.The root domain (like
zulip.com
itself) iszulipdev.com
itself.The default realm is hosted on
localhost:9991
rather thanzulip.zulipdev.com
, using theREALM_HOSTS
feature feature.
Details are below.
By default, Linux does not provide a convenient way to use subdomains
in your local development environment. To solve this problem, we use
the zulipdev.com domain, which has a wildcard A record pointing to
127.0.0.1. You can use zulipdev.com to connect to your Zulip
development server instead of localhost. The default realm with the
Shakespeare users has the subdomain zulip
and can be accessed by
visiting zulip.zulipdev.com.
If you are behind a proxy server, this method won’t work. When you
make a request to load zulipdev.com in your browser, the proxy server
will try to get the page on your behalf. Since zulipdev.com points
to 127.0.0.1 the proxy server is likely to give you a 503 error. The
workaround is to disable your proxy for *.zulipdev.com
. The DNS
lookup should still work even if you disable proxy for
*.zulipdev.com. If it doesn’t you can add zulipdev.com records in
/etc/hosts
file. The file should look something like this.
127.0.0.1 localhost
127.0.0.1 zulipdev.com
127.0.0.1 zulip.zulipdev.com
127.0.0.1 testsubdomain.zulipdev.com
These records are also useful if you want to, for example, run the Puppeteer tests when you are not connected to the Internet.