Dynatrace Gen3 - No Alert When PostgreSQL Docker Container Goes Down

[Selvam]

Hi Team,

I have a simple lab application built on:

1. Node.js application
2. PostgreSQL backend 

The PostgreSQL database is running as a Docker container service.

Environment details:

1. Dynatrace OneAgent version: 1.337
2. Full-stack monitoring enabled
3. Container was restarted after OneAgent installation
4. Using Dynatrace Gen3

Observation:

Dynatrace is able to monitor the container metrics successfully
CPU usage
Memory usage
Container metrics
When I manually stop the PostgreSQL container, I can see the CPU/Memory metrics dropping to zero
However:

Dynatrace is not generating any Problem or Alert when the container goes down
Nothing appears under Problems/Alerts
I also tried:

Process Availability policy
Matching process using:
Executable
Command line
$contains(postgres)
But still no alert is generated when the container stops.

My expectation:

I would like to generate an alert/problem whenever the PostgreSQL container service becomes unavailable/down.
Questions:

1. Does Dynatrace Gen3 require additional configuration for container process availability alerts?
2. Is Process Availability policy the correct approach for Docker containers?
3. Should this be configured through:
   Process monitoring rules
   Kubernetes/container workload alerts
   Custom metric events
   Service availability monitoring
   Is there any limitation with standalone Docker containers in Gen3?
   Any guidance or best practice would be appreciated.

Thanks,
selvam

[Julius_Loman]

For Kubernetes workloads, you probably want to alert on your Kubernetes data, in this case on Workload and setup the workload alerts for refine them.
For standalone containers (docker/podman), I'd recommend using process availability rules  (Not sure why this is in classic section in the docs, it is available in Gen3).

[Selvam]

it's standalone container (docker). i was trying to create the process availability rules. However, i was not able to save( there is no error).

please refer the attached screenshot in my question. will there any bug ? or am i missing something?

[Selvam]

Hi Team,

I’m trying to create a Process Availability alert in Dynatrace for a PostgreSQL Docker container.

Dynatrace is already detecting the process/container correctly, and I can see it in the Processes view. But when I stop the container, no alert/problem gets generated.

I also tried creating a Process Availability Monitoring rule, but either:

• the rule is not getting saved, or
• the alert is not triggering when the container goes down.