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TeamCity doesn't support downgrade. It is strongly recommended to back up your data before any upgrade.

Before upgrading TeamCity:

  1. Review what you will get by reviewing What's New (follow links at the bottom of What's New if you are upgrading not from the previous major release)
  2. Check your license
  3. Download new TeamCity version
  4. Carefully review the Upgrade Notes

To upgrade the server:

  1. Back up current TeamCity data
  2. Perform the upgrade steps:

If you plan to upgrade a production TeamCity installation, it is recommended to install a test server and checking it's functioning in your environment before upgrading the main one.

Licensing

Before upgrading please make sure the maintenance period of your licenses is not yet elapsed (use Administration | Licenses TeamCity server web UI page to list your license keys). The licenses are valid only for the versions of TeamCity with the effective release date within the maintenance period. See the effective release date at the page.

Please note that TeamCity versions 5.0 and above use licensing policy different from that of previous TeamCity versions. Please review the Licensing Policy page and the Licensing and Upgrade section on the official site.
If you are evaluating the newer version, you can get an evaluation license on the download page. Please note that each TeamCity version can be evaluated only once. To extend the evaluation period, please contact JetBrains sales department.

Upgrading TeamCity Server

TeamCity supports upgrades from any of the previous versions to the current one. Downgrades are not supported unless specifically noted.
On upgrade, all the configuration settings and other data are preserved unless noted in Upgrade Notes.

Important note on TeamCity data structure upgrade
TeamCity stores its data in the database and in TeamCity Data Directory on the file system. Different TeamCity versions use different data structure of the database and data directory. Upon starting newer version of TeamCity, the data is kept in the old format until you confirm the upgrade and data conversion on the Maintenance page in the web UI. Until you do so, you can back up the old data, however once complete the upgrade, the data is updated to a newer format.
Once the data is converted, downgrade is not possible!
There are several important issues with data format upgrade:
  • Data structure downgrade is not possible. Once newer TeamCity version changes the data format of database and data directory, you cannot use this data to run an older TeamCity version. Please ensure you have a backup of the data before upgrading TeamCity.
  • Both database and the data directory should be upgraded simultaneously. Ensure that during the first start of the newer server it uses correct TeamCity Data Directory that in its turn has correct database configured in the <TeamCity Data Directory>\config\database.properties file.

Upgrading Using Windows Installer

The following procedure applies only if you upgrade your TeamCity instance to version 6.0 or higher. If you are upgrading to another TeamCity version, please refer to corresponding documentation. The upgrade procedure for earlier TeamCity versions is different.
  1. Create a backup. Ensure you have configuration files and database data backed up.
  2. If you have any of the Windows service settings customized (like server memory settings), store them to later repeat the customizations.
  3. Run the new installer. Confirm uninstalling the previous installation. When prompted, specify the <TeamCity data directory> used by the previous installation.
  4. Make sure you have the external database driver installed (this applies only if you use external database).
  5. Restore any customizations of Windows services that you need
  6. Start up the TeamCity server (and agent, if it was installed together with the installer).
  7. Review the TeamCity Maintenance Mode page to make sure there are no problems encountered, and confirm the upgrade by clicking corresponding button. Only after that all data will be converted to the newer format.
    If you are upgrading from TeamCity 6.0 to a higher version, you can perform backup during the upgrade process right from the TeamCity Maintenance Mode page.

Manual Upgrading using .tar.gz or .war Distributions

  1. Create a backup. Ensure you have configuration files and database data backed up.
  2. Remove old installation files (the entire TeamCity home directory or [TOMCAT_HOME]/webapps/TeamCity/* if you are installing from a war file). It's advised to backup the directory beforehand.
  3. Unpack the new archive to the location where TeamCity was previously installed.
  4. If you use Tomcat server (your own or bundled in .tar.gz TeamCity distribution), it is recommended to delete content of the work directory. Please note that this may affect other web applications deployed into the same web server.
  5. Make sure you have the external database driver installed (this applies only if you use external database).
  6. If you use custom plugins that do not reside in <TeamCity Data Directory>, install them.
  7. Specify additional TeamCity server startup properties, if required.
  8. Start up the TeamCity server.
  9. Review the TeamCity Maintenance Mode page to make sure there are no problems encountered, and confirm the upgrade by clicking corresponding button. Only after that all the configuration data and database scheme are updated by TeamCity converters.

Upgrading Build Agents

Automatic Build Agent Upgrading

On starting newer TeamCity server, TeamCity agents connected to the server are updated automatically. The agent (agent.bat, agent.sh, or agent service) will download the latest agent upgrade from the TeamCity server. When the download is complete and the agent is idle, it will start the upgrade process (the agent is stopped, the agent files are updated, and agent is restarted). This process may take several minutes depending on the agent hardware and network bandwidth. Do not interrupt the upgrade process, as doing so may cause the upgrade to fail and you will need to manually reinstall the agent.

If you see that an agent is identified as "Agent disconnected (Will upgrade)" in the TeamCity web UI, do not close the agent console or restart the agent process, but wait for several minutes.

Various console windows can open and close during the agent upgrade. Please be patient and do not interrupt the process until the agent upgrade is finished.

Upgrading Build Agents Manually

All connected agents upgrade automatically, provided they are correctly installed, so manual upgrade is not necessary.

If you need to upgrade agent manually, you can follow the steps below:

As TeamCity agent does not hold any unique information, the easiest way to upgrade an agent if to

  • back up <Agent Home>/conf/buildAgent.properties file.
  • uninstall/delete existing agent.
  • install the new agent version.
  • restore previously saved buildAgent.properties file to the same location.
  • start the agent.

If you need to preserve all the agent data (e.g. to eliminate clean checkouts after the upgrade), you can:

  • stop the agent.
  • delete all the directories in the agent installation present in the agent .zip distribution except conf.
  • unpack the .zip distribution to the agent installation directory, skipping the "conf" directory.
  • start the agent.

In the latter case if you run agent under Windows using service, you can also need to upgrade Windows service as described below.

Upgrading the Build Agent Windows Service Wrapper

Upgrading from TeamCity version 1.x

Version 2.0 of TeamCity migrated to new way of managing Windows service (service wrapper) for the build agent: Java Service Wrapper library.

One of advantages of using new service wrapper is ability to change any JVM parameters of the build agent process.

1.x versions installed Windows service under name agentd, while 2.x versions use TeamCity Build Agent Service <build number> name.

The service wrapper will not be migrated to new version automatically. You do not need to use the new service wrapper, unless you need its functionality (like changing agent JVM parameters).

To use new service wrapper you should uninstall old version of the agent (with Control Panel | Add/Remove Programs) and then install a new one.

If you customized the user under which the service is started, do not forget to customize it in the newly installed service.

Upgrading from TeamCity version 2.x

If the service wrapper needs an update, the new version is downloaded into the <agent>/launcher.latest folder, however the changes are not applied automatically.

To upgrade the service wrapper manually, do the following:

  1. Ensure the <agent>/launcher.latest folder exists.
  2. Stop the service using <agent>\bin\service.stop.bat.
  3. Uninstall the service using service.uninstall.bat.
  4. Backup <agent>/launcher/conf/wrapper.conf file.
  5. Delete <agent>/launcher.
  6. Rename <agent>/launcher.latest to <agent>/launcher.
  7. Edit <agent>/launcher/conf/wrapper.conf file. Check that the 'wrapper.java.command' property points to the java.exe file. Leave it blank to use registry to lookup for java. Leave 'java.exe' to lookup java.exe in PATH. For a standalone agent the service value should be ../jre/bin/java, for and agent installation on the server the value should be ../../jre/bin/java. The backup version of wrapper.conf file may be used.
  8. Install the service using <agent>\bin\service.install.bat.
  9. Make sure the service is running under the proper user account. Please note that using SYSTEM can result in failing builds which use MSBuild/Sln2005 configurations.
  10. Start the service using <agent>\bin\service.start.bat.
    This procedure is applicable ONLY for an agent running with new service wrapper. Make sure you are not running the agentd service.



See also:

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server server Delete
upgrade upgrade Delete
agent agent Delete
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