Enabling SSL/TLS for OpsCenter and Agent communication - Tarball Installations

To enable SSL for tarball installations, edit the configuration file and run a script to generate the keys used by OpsCenter and the agents.

address.yaml

The location of the address.yaml file depends on the type of installation:

Package installations: /var/lib/datastax-agent/conf/address.yaml
Tarball installations: install_location/conf/address.yaml

opscenterd.conf

The location of the opscenterd.conf file depends on the type of installation:

Package installations: /etc/opscenter/opscenterd.conf
Tarball installations: install_location/conf/opscenterd.conf

Prerequisites

OpsCenter requires the .der file format for SSL. If your existing [agents] ssl_certfile in is in a .pem format, run the following command to convert the format:

openssl x509 -outform der -in /install_location/ssl/opscenter.pem -out /install_location/ssl/opscenter.der

[agents] ssl_certfile: The location of the SSL certificate used for SSL traffic between OpsCenter and the DataStax Agents. The default location is /var/lib/opscenter/ssl/opscenter.der for package installations and install_location/ssl/opscenter.der for tarball installations.

For more information about SSL cert file formats, see converting SSL certificates.

Procedure

Optional:
Warning: If the SSL files already exist in the install_location/ssl directory, they are not automatically recreated. Before running setup.py, remove the old SSL files from that directory.
Run the OpsCenter setup.py script:
```
sudo install_location/bin/jython install_location/bin/setup.py
```
The script generates the SSL keys and certificates used by the OpsCenter daemon and the agents to communicate with one another in the following directory: install_location/ssl

Open opscenterd.conf in an editor and add an [agents] section with the use_ssl option set to enable SSL. See configuring the agent for ssl for more details on the use_ssl option.

sudo vi install_location/conf/opscenterd.conf


[agents]
use_ssl = true
ssl_keyfile =  install_location/ssl/opscenter.key
ssl_certfile = install_location/ssl/opscenter.der
agent_keyfile = install_location/ssl/agentKeyStore
agent_keyfile_raw = install_location/ssl/agentKeyStore.key # for non-Java clients
agent_certfile = install_location/ssl/agentKeyStore.der

Restart the OpsCenter daemon.
If you need to connect to a cluster in which agents have already been deployed, log in to each of the nodes and reconfigure the address.yaml file. Reconfigure the agents on all nodes.

Tip: If you do not want to manually edit all of the node configuration files, follow the installing DataStax agents automatically procedure.
1. On each node in the cluster, copy install_location/ssl/agentKeyStore from the OpsCenter machine to /var/lib/datastax-agent/ssl/agentKeyStore for agent_install_location/ssl/agentKeyStore for package installs, or agent_install_location/ssl/agentKeyStore for tarball installs.
```
scp /opt/opscenter/ssl/agentKeyStore user@node:/var/lib/datastax-agent/ssl/
```
  Where node is either the host name of the node or its IP address and user is the user ID on the node.
2. Log into each node in the cluster using ssh.
```
ssh user@node
```
  Where node is either the host name of the node or its IP address and user is the user ID on the node.
3. Edit the address.yaml file, changing the value of use_ssl to 1.
```
sudo vi install_location/conf/address.yaml
```
```
use_ssl: 1
```
4. Restart the agent.
```
sudo install_location/bin/datastax-agent
```
After opscenterd and all agents have been configured and restarted, verify proper agent connection through the Agent Status tab.