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3 Installing Postgres Enterprise Manager™ : 3.5 Installing a PEM Agent

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The Setup… page opens, welcoming you to the PEM Agent installer (as shown in Figure 3.60).
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Click Next to continue to the License Agreement (shown in Figure 3.61).
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By default, the PEM agent is installed in the /home/opt/PEM directory. You can accept the default installation directory, or modify the contents of the Installation Directory field, specifying an alternate installation directory for the PEM agent.
By default, the PEM agent installer places a certificate in ~root/.pem (on Linux) or in the Administrator’s %APPDATA%\pem directory (on Windows). Check the Show advanced options box to indicate that you would like the PEM agent installer to include a dialog that allows you to specify an alternate path for the certificate file.
Click Next to continue to the PEM Server Installation Details dialog (shown in Figure 3.63).
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Specify the name or IP address of the host running the PEM server in the Host field (that is, the host running the database server containing the pem database, not the host running the Apache/PHP web server if two separate hosts are being used).
Click Next to continue. The installer will attempt to connect to the server to verify that the details are correct.
Please Note: The PEM server must allow connections from the PEM agent installer. If you encounter a connection error, confirm the connection properties specified on the PEM Server Installation Details dialog are correct, and confirm that the pg_hba.conf file (on the PEM server) will allow a connection to the server described in the error message. For information about modifying the pg_hba.conf file, see Section 8.1.
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The PEM client tree control displays the value entered in the Description field (on the Agent Details dialog, shown in Figure 3.64) to identify the PEM agent. Specify a descriptive name for the agent, such as the hostname of the machine the agent is installed on, or a name that reflects the hosts functionality (such as Acctg).
If you checked the Show advanced options checkbox shown in Figure 3.24, the Advanced options dialog opens (shown in Figure 3.65).
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By default, the PEM agent installer places the certificate in the /root/.pem directory. Specify an alternate path for the certificate or accept the default and click Next.
The wizard is now ready to install the PEM agent; click Back to amend the installation directory, or Next to continue.
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Click Next on the Ready to Install dialog (shown in Figure 3.66) to instruct the installer to copy files to the system and register the agent on the PEM server.
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By default, the PEM agent is installed with root privileges for the operating system host and superuser privileges for the database server. These privileges allow the PEM agent to invoke unrestricted probes on the monitored host and database server about system usage, retrieving and returning the information to the PEM server.
Please note that PEM functionality diminishes as the privileges of the PEM agent decrease. For complete functionality, the PEM agent should run as root. If the PEM agent is run under the database server's service account, PEM probes will not have complete access to the statistical information used to generate reports, and functionality will be limited to the capabilities of that account. If the PEM agent is run under another lesser-privileged account, functionality will be limited even further.

3 Installing Postgres Enterprise Manager™ : 3.5 Installing a PEM Agent

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