Install Multiple Agents on One Machine
If a machine is capable of running several concurrent builds, you can install multiple TeamCity agents on it. However, we recommend running a single agent per (virtual) machine to minimize builds cross-influence and make builds more predictable.
TeamCity treats all agents equally regardless of whether they are installed on the same or on different machines.
When installing multiple TeamCity build agents on the same machine, consider the following:
The builds running on such agents should not conflict for any resource (common disk directories, OS processes, OS temp directories).
Depending on the hardware and the builds' specifics, you may experience degraded building performance. Ensure there are no disk, memory, or CPU bottlenecks when several builds are running at the same time.
After having one agent installed, you can install additional agents by following the regular installation procedure (see an exception for the Windows service below), but make sure that:
The agents are installed using different OS users so that user-level resources (like Maven/Gradle/NuGet local artifact caches) do not conflict.
The agents are installed in separate directories.
The agents have the distinctive
tempDirdirectories in the
Values for the
No build configurations specify the absolute path to the checkout directory (or, if necessary, you can enable the "clean checkout" option and make sure they do not run in parallel).
Usually, for a new agent installation, you can just copy the directory of an existing agent to a new place except its
system directories. Then, modify
conf/buildAgent.properties with the new
ownPort values. Clear (delete or remove the value) the
authorizationToken property and make sure the
tempDir are relative / do not clash with another agent.
Configuring Second Build Agent on Windows
If you use the Windows installer and want to run the agent as a service, you will need to perform extra steps as installing second agent as a service on the same machine is not supported by the installer: the existing service is overwritten (see the related feature request).
You need to install the second agent manually (using the
.zip agent distribution). You can use the Windows agent installer and do not opt for service installation, but this way you will lose the uninstallation option for the initially installed agent.
After the second agent is installed, register a new service for it as described in this section.
Configuring Second Build Agent on macOS
If you want to start multiple build agents on macOS, repeat the procedure of installing and starting a build agent with the following alterations:
Install the second build agent in a different directory.
conf/buildAgent.properties, specify a different agent name.
Do not run
Create a copy of the
$HOME/Library/LaunchAgents/jetbrains.teamcity.BuildAgent2.plistfile and set the following parameters:
WorkingDirectoryparameter to the correct path to the second build agent home
Start the second agent with the command
launchctl load $HOME/Library/LaunchAgents/jetbrains.teamcity.BuildAgent2.plist.
To verify that both build agents are running, use the following command: