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A Cloud Guru

Troubleshoot Service Errors on Start

In this exercise, you will troubleshoot and resolve service errors upon start of the `pmcd` service. *This course is not approved or sponsored by Red Hat.*

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Path Info

Level

Advanced

Duration

1h 30m

Published

Apr 04, 2019

Challenge

Resolve the startup issue with pmcd.
Attempt to start the pmcd service:
```
systemctl start pmcd
```
If the service fails to start, take a look at the details:
```
systemctl status -l pmcd
```
Note the "Drop-In" file /etc/systemd/system/pmcd.service.d/dependency.conf.

View the contents of this file and note any directives referencing other services:
```
cat /etc/systemd/system/pmcd.service.d/dependency.conf
```
Attempt to start the pmlogger service:
```
systemctl start pmlogger
```
If the service won't start, perform the same exercise as above with pmcd.

Resolve the cyclical dependency by modifying the pmcd drop-in file from After=pmlogger.service to Before=pmlogger.service.

Start the pmcd service.
Challenge

Configure pmcd to start by default.
Enable pmcd to startup upon reboot:
```
systemctl enable pmcd
```

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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