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In environments where hundreds of containers are launched simultaneously on a day-to-day basis, administrators may actually want to keep track on the containers that are currently running/stopped/removed etc. This will help them identify those containers that were sparsely used and those that crashed recently. By turning the spot-light on such analysis, administrators can optimize the containers thereby improving the overall performance of the target container engine. The CorOSContinerStTest helps administrators in this regard!

This test reports the total count of containers launched using the target CRIO container engine. In addition, this test reports the count of containers that are currently running/added/removed/paused. This test also sheds light on those containers that were not started for a long time and those containers that were running for a longer duration. The detailed diagnosis of this test helps administrators figure out the exact name of the containers that are running/added/removed/paused.

Outputs of the test : One set of results for the target CRIO Engine being monitored

Measurement	Description	Measurement Unit	Interpretation
Total_Container	Indicates the total number of containers launched using the target CRIO container engine.	Number	The detailed diagnosis of this measure if enabled, lists the name of the container, the container ID, the image used to create the container, the container creation time, the status of the container and the size of the container.
Running_Container	Indicates the number of containers that are currently running.	Number	A high value of this measure indicates that more number of containers are in running state as a result more number of applications can be accessed actively. To know which containers are currently running, use the detailed diagnosis capability of this measure.
Crashed_Container	Indicates the number of containers that exited during the last measurement period.	Number	To know more about the containers that exited, use the detailed diagnosis capability of this measure.
Added_Container	Indicates the number of containers that were created during the last measurement period.	Number	The detailed diagnosis of this measure lists the name of the containers that were created.
Removed_Container	Indicates the number of containers that were removed during the last measurement period.	Number	The detailed diagnosis of this measure lists the containers that were removed. If too many containers are removed, then the users may not be able to access the hosted applications thus leading to a performance bottleneck of the Docker server. Administrators are therefore required to keep a check on the containers that are removed from the Docker server.
Paused_Container	Indicates the number of containers that were paused during the last measurement period.	Number	The detailed diagnosis of this measure lists the name of the containers that were paused.
Longrun_Container	Indicates the number of containers that were running for a duration longer than the configured time limit against the Long Run Container Days parameter.	Number	The detailed diagnosis of this measure lists the name of the containers that were running for a longer duration.
Longtime_Notstarted_Containers	Indicates the number of containers that were not running for more than the configured Time Limit in weeks.	Number	Ideally, the value of this measure should be low. The detailed diagnosis of this measure if enabled, lists the containers that are not started for a longer time.