Anaconda Enterprise: Documentation

# SSL (AEN 4.0)

The Anaconda Enterprise Notebooks (AEN) Server uses `nginx` to proxy all incoming http(s) requests to the Server running on a local port. Also, `nginx` is used for SSL termination. The default setup uses http (non-SSL) since cert files are required to configure SSL and each Enterprise will have their own cert files.

SSL certs with passphrases are not currently supported.

The `www.enterprise.conf` file is the default `nginx` `.conf` file used for Anaconda Enterprise Notebooks. It is copied to the `/etc/nginx/conf.d` directory during Server install.

Note: This document is for the case where you are setting up SSL after the Gateway has been installed and registered with the Server.

## Required files

To configure SSL on AEN you will need the following files

- Server certificate and key
- Server CA bundle
- Gateway certificate and key
- Gateway CA bundle

1. Copy the Gateway certificate and key to `/opt/wakari/wakari-gateway/etc/` on the Gateway as `gateway.crt` and `gateway.key`.
2. Copy the Gateway CA bundle to `/opt/wakari/wakari-server/etc/` on the Server
3. Copy the Server certificate and key to `/etc/nginx` on the Server as `server.crt` and `server.key`
4. Copy the Server CA bundle to `/opt/wakari/wakari-gateway/etc/` on the Gateway

If you have a certificate that was signed by a private root CA and/or an intermediate authority then the following must be true

- The Gateway CA bundle needs to contain the root CA, any intermediate and the certificate.
- The Server CA bundle needs to be separate files for the root CA, any intermediate and the certificate.

## Configure SSL on the Server

The `www.enterprise.https.conf` is a nginx configuration file for SSL configurations. It is setup to use cert files called `server.crt` and `server.key` but these value must be changed to point to signed cert files for your domain. NOTE: self-signed certs or certs signed by a private root CA require additional configuration

Perform the following steps as `root`:

1. Stop Nginx: `service nginx stop`

2. Move the `/etc/nginx/conf.d/www.enterprise.conf` file to a backup directory.

3. Copy the `/opt/wakari/wakari-server/lib/python2.7/site-packages/`

     `wk_server/config/www.enterprise.https.conf` file to `/etc/nginx/conf.d`

Note: that only one of `www.enterprise.conf` or `www.enterprise.https.conf` can be in `/etc/nginx/conf.d`

1. Edit the /etc/nginx/conf.d/www.enterprise.https.conf file and change the `server.crt` and `server.key` values to the names of the real cert and key files if they are different.

2. Start nginx: `service nginx start`

3. Update the `WAKARI_SERVER` and `CDN` settings in the config files to use https instead of http. The config files that need to be changed are:

       /opt/wakari/wakari-server/etc/wakari/config.json
       /opt/wakari/wakari-gateway/etc/wakari/wk-gateway-config.json
       /opt/wakari/wakari-compute/etc/wakari/config.json

4. Edit `/opt/wakari/wakari-server/etc/wakari/wk-server-config.json` and add

       "verify_gateway_certificate": "/opt/wakari/wakari-server/etc/gateway.crt"

5. Restart Anaconda Enterprise Notebooks services the Server:

       service wakari-server restart

6. Browse to Anaconda Enterprise Notebooks and verify that the browser uses `https`.

7. In the Admin settings, under Data Centers select the Gateway and check the https box.

Note: this step may return an error since the Gateway has not yet been configured for SSL.

## Configure SSL on the Gateway

1. Edit `/opt/wakari/wakari-compute/etc/wakari/config.json` to change http to https.

#. Modify the configuration file `/opt/wakari/wakari-gateway/etc/wakari/wk-gateway-config.json` and add:

    {
        EXISTING_CONFIGURATION,
        "https": {
            "key": "/opt/wakari/wakari-gateway/etc/gateway.key",
            "cert": "/opt/wakari/wakari-gateway/etc/gateway.crt"
        }
    }

1. If you have a Server cert that was signed by a private root CA (and/or intermediate authority) add the following to the `https` key

    "ca": ["/opt/wakari/wakari-gateway/etc/server.crt"]

Note: The `ca` key must contain separate values for the paths to the CA root, any intermediate and the certificate for the Server

Restart the Gateway: `sudo service wakari-gateway restart`

## SSL on Compute Nodes

Anaconda Enterprise does not provide for SSL on the compute nodes directly. We recommend installing the Compute on the same machine as the Gateway and using `http://localhost:5002` for the URL value while adding it as a resource.

You would need a Gateway for each and every Compute node.

## Security Reminder

The permissions on the cert files need to set correctly to prevent them from being read by others. Only the root user needs to be able to read the cert files since `nginx` is run by root.

Assuming the cert files are called `server.crt` and `server.key`, use the `root` account to set the permissions as follows:

    chmod 600 server.key
    chmod 600 server.crt

## Strict Transport Security Header

Strict-Transport-Security is enabled by default in the `www.enterprise.https.conf` file.

    add_header Strict-Transport-Security max-age=31536000;

It can remain enabled if either of the following is true.

1. The Gateway is running on a different host than the Server; or
2. SSL has been enabled for the Gateway

It is necessary that you comment out this line if both of the following conditions are true:

1. The Gateway is running on the same host as the Server; and
2. SSL has not been enabled for the Gateway

Leaving it enabled when these conditions are true will cause a mismatch in protocols between the Server and Gateway and apps will fail to launch correctly.