First, uninstall Agent v7 from your system.

Then, if you followed the instructions to upgrade from v6 to v7, run the following Agent installation command to downgrade your Agent from version 7 to version 6:

DD_API_KEY="<DATADOG_API_KEY>" bash -c "$(curl -L https://install.datadoghq.com/scripts/install_script_agent6.sh)"

The command works on all supported versions of Amazon Linux, CentOS, Debian, Fedora, Red Hat, Ubuntu, and SUSE.

1. Uninstall Agent v7 from your system.
2. Download the Datadog Agent installer.
3. Run the installer (as Administrator) by opening datadog-agent-6-latest.amd64.msi.
4. Follow the prompts, accept the license agreement, and enter your Datadog API key.
5. When the install finishes, you are given the option to launch the Datadog Agent Manager.

Note: Links to all available versions of the Windows Installer are provided in JSON format.

First, uninstall Agent v7 from your system.

Then, if you followed the instructions to upgrade from v6 to v7, run the Agent installation command with the environment variable DD_AGENT_MAJOR_VERSION=6 to downgrade your Agent from version 7 to version 6:

DD_AGENT_MAJOR_VERSION=6 DD_API_KEY="<DATADOG_API_KEY>" bash -c "$(curl -L https://install.datadoghq.com/scripts/install_mac_os.sh)"

Debian Flavored Systems:

1. Set up apt so it can download through https and install curl and gnupg

   sudo apt-get update
   sudo apt-get install apt-transport-https curl gnupg
   

2. Remove Beta Repo and Ensure the stable repo is present:

   sudo rm /etc/apt/sources.list.d/datadog-beta.list
   [ ! -f /etc/apt/sources.list.d/datadog.list ] &&  echo 'deb [signed-by=/usr/share/keyrings/datadog-archive-keyring.gpg] https://apt.datadoghq.com/ stable main' | sudo tee /etc/apt/sources.list.d/datadog.list
   sudo touch /usr/share/keyrings/datadog-archive-keyring.gpg
   
   curl https://keys.datadoghq.com/DATADOG_APT_KEY_CURRENT.public | sudo gpg --no-default-keyring --keyring /usr/share/keyrings/datadog-archive-keyring.gpg --import --batch
   curl https://keys.datadoghq.com/DATADOG_APT_KEY_06462314.public | sudo gpg --no-default-keyring --keyring /usr/share/keyrings/datadog-archive-keyring.gpg --import --batch
   curl https://keys.datadoghq.com/DATADOG_APT_KEY_C0962C7D.public | sudo gpg --no-default-keyring --keyring /usr/share/keyrings/datadog-archive-keyring.gpg --import --batch
   curl https://keys.datadoghq.com/DATADOG_APT_KEY_F14F620E.public | sudo gpg --no-default-keyring --keyring /usr/share/keyrings/datadog-archive-keyring.gpg --import --batch
   curl https://keys.datadoghq.com/DATADOG_APT_KEY_382E94DE.public | sudo gpg --no-default-keyring --keyring /usr/share/keyrings/datadog-archive-keyring.gpg --import --batch
   

3. If running Ubuntu 14 or earlier or Debian 8 or earlier, copy the keyring to /etc/apt/trusted.gpg.d:

   sudo cp /usr/share/keyrings/datadog-archive-keyring.gpg /etc/apt/trusted.gpg.d
   

4. Update apt and downgrade the Agent:

   sudo apt-get update
   sudo apt-get remove datadog-agent
   sudo apt-get install datadog-agent
   

5. Back-sync configurations and AutoDiscovery templates (optional)

   If you made any changes to your configurations or templates, you might want to sync these back for Agent v5.

   Note: If you made any changes to your configurations to support Agent v6 only options, these do not work with Agent v5.

6. Back-sync custom checks (optional):

   If you made any changes or added any new custom checks while testing Agent 6 you might want to enable them back on Agent 5. Note: You only need to copy back checks you changed.

   sudo -u dd-agent -- cp /etc/datadog-agent/checks.d/<CHECK>.py /etc/dd-agent/checks.d/
   

7. Restart the Agent:

   sudo systemctl restart datadog-agent # Systemd
   sudo /etc/init.d/datadog-agent restart # Upstart
   

8. Clean out /etc/datadog-agent (optional):

   sudo -u dd-agent -- rm -rf /etc/datadog-agent/
   

Red Hat Flavored Systems:

1. Remove the Beta Yum repo from your system:

   rm /etc/yum.repos.d/datadog-beta.repo
   [ ! -f /etc/yum.repos.d/datadog.repo ] && echo -e '[datadog]\nname = Datadog, Inc.\nbaseurl = https://yum.datadoghq.com/rpm/x86_64/   \nenabled=1\ngpgcheck=1\nrepo_gpgcheck=1\npriority=1\ngpgkey=https://keys.datadoghq.com/DATADOG_RPM_KEY_CURRENT.public\n       https://keys.datadoghq.com/DATADOG_RPM_KEY_4F09D16B.public\n       https://keys.datadoghq.com/DATADOG_RPM_KEY_B01082D3.public\n       https://keys.datadoghq.com/DATADOG_RPM_KEY_FD4BF915.public\n       https://keys.datadoghq.com/DATADOG_RPM_KEY_E09422B3.public' | sudo tee /etc/yum.repos.d/datadog.repo
   

   Note: due to a bug in dnf, use repo_gpgcheck=0 instead of repo_gpgcheck=1 on RHEL/CentOS 8.1.

2. Update your local yum cache and downgrade the Agent

   sudo yum clean expire-cache metadata
   sudo yum check-update
   sudo yum remove datadog-agent
   sudo yum install datadog-agent
   

3. Back-sync configurations and AutoDiscovery templates (optional)

   If you made any changes to your configurations or templates, you might want to sync these back for Agent v5.

   Note: If you made any changes to your configurations to support Agent v6 only options, these do not work with Agent v5.

4. Back-sync custom checks (optional):

   If you made any changes or added any new custom checks while testing Agent 6 you might want to enable them back on Agent 5. Note: You only need to copy back checks you changed.

   sudo -u dd-agent -- cp /etc/datadog-agent/checks.d/<CHECK>.py /etc/dd-agent/checks.d/
   

5. Restart the Agent:

   sudo systemctl restart datadog-agent # Systemd
   sudo /etc/init.d/datadog-agent restart # Upstart
   

6. Clean out /etc/datadog-agent (optional):

   sudo -u dd-agent -- rm -rf /etc/datadog-agent/
   

Run the agent installer package for the latest 5.x version, instructions can be found in the Datadog agent integration page.

1. Stop the Agent with the systray app, if it’s running.
2. Exit the systray app.
3. Uninstall the Datadog Agent application.
4. Install the Agent 5 DMG package using your preferred installation method.