You must manually quit the telnet connection when you finish. One of the possible errors that telnet can fail with is: No route to host Possible causes for this error can include: A firewall issue, for example iptables incorrectly configured to block port between hosts. A physical break in network connectivity to the collector machine. A Connection refused message generally means that zenrender is not started or responding.
Search for Hung zenrender Processes with Netstat Log on to the remote collector and enter the following as the zenoss user: If the process IDs do not match, stop kill the daemon identified by the netstat command and restart the zenrender daemon. Verify the Correct Port for the daemon with netstat Log on to the remote collector and enter the following as the zenoss user: If zenrender is listening on a different port, either reconfigure the port to listen on port , or update the collector's settings in the appropriate section of the Resource Manager user interface.
Obtain a Sample Performance Graph from the Zenoss Master Perform the following process to manually obtain a sample performance graph: In the Device pane, select a device associated with the remote collector to display the Overview pane for the device. Click the Graphs tab in the left pane to display the Performance Graphs in the right pane.
Select a graph and right-click the graph. Select Copy Image Location. Paste the location information into a text file so it can be viewed and copied. The location information yields a long data string, for example: From the Zenoss master, use the wget command to obtain the image directly from the remote collector.
For example, using the line of code from the location, the bold section in our example above: The port number in this wget is , not This should successfully connect with a message. HTTP request sent, awaiting response If you copy the file to a desktop to view the graph, ensure the copy is binary instead of text, without conversion such as DOS to Unix.
For example using the line of code from the location: If the graphs can be successfully obtained manually, it is likely that the desktop client browsers cannot connect directly to the port to obtain the graphic.
Verify that Desktop Browsers can Connect To verify whether the browsers can connect directly to the appropriate port to obtain the performance graphic file, enter the URL into the desktop browser to view the page.
If the page times out or shows unavailable, this indicates a firewall issue between the client and the Zenoss master. For example, port unavailable. Was this article helpful?