Installation example with Docker

We’ll describe how to get Nextcloud Office running on your server and how to integrate it into your Nextcloud using the docker image Nextcloud and Collabora built.

To install it the following dependencies are required:

A host that can run a Docker container
A subdomain or a second domain that the Collabora Online server can run on
An Apache server with some enabled modules
A valid SSL certificate for the domain that Collabora Online should run on
A valid SSL certificate for your Nextcloud

Install the Collabora Online server

The following steps will download the Collabora Online docker. Make sure to replace “cloud.example.com” with the host that your own Nextcloud runs on. If you want to use the docker container with more than one Nextcloud, you can add another -e aliasgroup2=https://cloud2.example.com:443.

docker pull collabora/code
docker run -t -d -p 127.0.0.1:9980:9980 \
    -e 'aliasgroup1=https://cloud.example.com:443' \
    --restart always \
    --cap-add MKNOD \
    collabora/code

That will be enough. Once you have done that the server will listen on “localhost:9980”. Now we just need to configure the locally installed Apache reverse proxy.

Install the Apache reverse proxy

On a recent Ubuntu or Debian this should be possible using:

apt-get install apache2
a2enmod proxy proxy_wstunnel proxy_http ssl

Afterward, configure one VirtualHost properly to proxy the traffic. For security reason we recommend to use a subdomain such as office.example.com instead of running on the same domain. An example config can be found below:

########################################
# Reverse proxy for Collabora Online
########################################

AllowEncodedSlashes NoDecode
SSLProxyEngine On
ProxyPreserveHost On

# cert is issued for collaboraonline.example.com and we proxy to localhost
SSLProxyVerify None
SSLProxyCheckPeerCN Off
SSLProxyCheckPeerName Off

# static html, js, images, etc. served from coolwsd
# browser is the client part of Collabora Online
ProxyPass           /browser https://127.0.0.1:9980/browser retry=0
ProxyPassReverse    /browser https://127.0.0.1:9980/browser

# WOPI discovery URL
ProxyPass           /hosting/discovery https://127.0.0.1:9980/hosting/discovery retry=0
ProxyPassReverse    /hosting/discovery https://127.0.0.1:9980/hosting/discovery

# Capabilities
ProxyPass           /hosting/capabilities https://127.0.0.1:9980/hosting/capabilities retry=0
ProxyPassReverse    /hosting/capabilities https://127.0.0.1:9980/hosting/capabilities

# Main websocket
ProxyPassMatch      "/cool/(.*)/ws$"      wss://127.0.0.1:9980/cool/$1/ws nocanon

# Admin Console websocket
ProxyPass           /cool/adminws wss://127.0.0.1:9980/cool/adminws

# Download as, Fullscreen presentation and Image upload operations
ProxyPass           /cool https://127.0.0.1:9980/cool
ProxyPassReverse    /cool https://127.0.0.1:9980/cool
# Compatibility with integrations that use the /lool/convert-to endpoint
ProxyPass           /lool https://127.0.0.1:9980/cool
ProxyPassReverse    /lool https://127.0.0.1:9980/cool

After configuring these do restart your apache using systemctl restart apache2.

Configure the app in Nextcloud

Go to the Apps section and choose “Office & text”
Install the “Nextcloud Office” app
Go to Admin -> Office -> Specify the server you have setup before (e.g. “https://office.example.com”)

Congratulations, your Nextcloud has Collabora Online Office integrated!

Updating

Occasionally, new versions of this docker image are released with security and feature updates. We will of course let you know when that happens! This is how you upgrade to a new version:

Update the docker image:

docker pull collabora/code

List running docker containers:

docker ps

Stop and remove the Collabora Online container with the container id of the running one:

docker stop CONTAINER_ID
docker rm CONTAINER_ID

Start the new container:

docker run -t -d -p 127.0.0.1:9980:9980 -e 'domain=cloud\\.example\\.com' \
    --restart always --cap-add MKNOD collabora/code