Manually install SSM Agent on CentOS instances - AWS Systems Manager

Manually install SSM Agent on CentOS instances

Connect to your CentOS instance and perform the following steps to install the SSM Agent.

Note

If you use a yum command to update SSM Agent on a managed instance after the agent has been installed or updated using the SSM document AWS-UpdateSSMAgent, you might see the following message: "Warning: RPMDB altered outside of yum." This message is expected and can be safely ignored.

Perform these steps on each instance that will run commands using Systems Manager.

CentOS 8.x

To install SSM Agent on CentOS 8.x

  1. Ensure that either Python 2 or Python 3 is installed on your CentOS 8 instance. This is required in order for SSM Agent to work properly.

  2. Use one of the following commands to download and run the SSM Agent installer.

    region represents the identifier for an AWS Region supported by AWS Systems Manager, such as us-east-2 for the US East (Ohio) Region. For a list of supported region values, see the Region column in Systems Manager service endpoints in the Amazon Web Services General Reference.

    Intel 64-bit (x86_64) instances:

    sudo dnf install -y https://s3.region.amazonaws.com/amazon-ssm-region/latest/linux_amd64/amazon-ssm-agent.rpm

    Intel 32-bit (x86) instances:

    sudo dnf install -y https://s3.region.amazonaws.com/amazon-ssm-region/latest/linux_386/amazon-ssm-agent.rpm
  3. Run one of the following commands to determine if SSM Agent is running. The command should return the message amazon-ssm-agent is running.

    sudo systemctl status amazon-ssm-agent
  4. Run the following commands if the previous command returned amazon-ssm-agent is stopped.

    1. Start the service.

      sudo systemctl enable amazon-ssm-agent
      sudo systemctl start amazon-ssm-agent
    2. Check the status of the agent.

      sudo systemctl status amazon-ssm-agent
CentOS 7.x

To install SSM Agent on CentOS 7.x

  1. Use one of the following commands to download and run the SSM Agent installer.

    region represents the identifier for an AWS Region supported by AWS Systems Manager, such as us-east-2 for the US East (Ohio) Region. For a list of supported region values, see the Region column in Systems Manager service endpoints in the Amazon Web Services General Reference.

    Intel 64-bit (x86_64) instances:

    sudo yum install -y https://s3.region.amazonaws.com/amazon-ssm-region/latest/linux_amd64/amazon-ssm-agent.rpm

    Intel 32-bit (x86) instances:

    sudo yum install -y https://s3.region.amazonaws.com/amazon-ssm-region/latest/linux_386/amazon-ssm-agent.rpm

    ARM 64-bit (arm64) instances:

    sudo yum install -y https://s3.region.amazonaws.com/amazon-ssm-region/latest/linux_arm64/amazon-ssm-agent.rpm
  2. Run one of the following commands to determine if SSM Agent is running. The command should return the message amazon-ssm-agent is running.

    sudo systemctl status amazon-ssm-agent
  3. Run the following commands if the previous command returned amazon-ssm-agent is stopped.

    1. Start the service.

      sudo systemctl enable amazon-ssm-agent
      sudo systemctl start amazon-ssm-agent
    2. Check the status of the agent.

      sudo systemctl status amazon-ssm-agent
CentOS 6.x

To install SSM Agent on CentOS 6.x

  1. Use one of the following commands to download and run the SSM Agent installer.

    region represents the identifier for an AWS Region supported by AWS Systems Manager, such as us-east-2 for the US East (Ohio) Region. For a list of supported region values, see the Region column in Systems Manager service endpoints in the Amazon Web Services General Reference.

    Intel 64-bit (x86_64) instances:

    sudo yum install -y https://s3.region.amazonaws.com/amazon-ssm-region/latest/linux_amd64/amazon-ssm-agent.rpm

    Intel 32-bit (x86) instances:

    sudo yum install -y https://s3.region.amazonaws.com/amazon-ssm-region/latest/linux_386/amazon-ssm-agent.rpm
  2. Run one of the following commands to determine if SSM Agent is running. The command should return the message amazon-ssm-agent is running.

    sudo status amazon-ssm-agent
  3. Run the following commands if the previous command returned amazon-ssm-agent is stopped.

    1. Start the service.

      sudo start amazon-ssm-agent
    2. Check the status of the agent.

      sudo status amazon-ssm-agent
Note

If you're unable to download the agent from the Region you specify, use one of the global URLs below. Note that even though the following URLs show 'ec2-downloads-windows', these are the correct URLs for Linux operating systems.

  • Intel 64-bit (x86_64)

    https://s3.amazonaws.com/ec2-downloads-windows/SSMAgent/latest/linux_amd64/amazon-ssm-agent.rpm
  • Intel 32-bit (x86)

    https://s3.amazonaws.com/ec2-downloads-windows/SSMAgent/latest/linux_386/amazon-ssm-agent.rpm
  • ARM 64-bit (arm64)

    https://s3.amazonaws.com/ec2-downloads-windows/SSMAgent/latest/linux_arm64/amazon-ssm-agent.rpm
Important

An updated version of SSM Agent is released whenever new capabilities are added to Systems Manager or updates are made to existing capabilities. If an older version of the agent is running on an instance, some SSM Agent processes can fail. For that reason, we recommend that you automate the process of keeping SSM Agent up-to-date on your instances. For information, see Automating updates to SSM Agent. To be notified about SSM Agent updates, subscribe to the SSM Agent Release Notes page on GitHub.