Install Cloudwatch Publisher on RaspberryPi

Question

Hi all, i am following this guide [https://github.com/awslabs/amazon-cloudwatch-publisher](https://github.com/awslabs/amazon-cloudwatch-publisher) to install cloudwatch publisher on my RaspberryPi, i followed all the steps but i am getting this error

```
pi@pi-hole:~/temp/amazon-cloudwatch-publisher $ systemctl status amazon-cloudwatch-publisher
● amazon-cloudwatch-publisher.service - amazon-cloudwatch-publisher
    Loaded: loaded (/etc/systemd/system/amazon-cloudwatch-publisher.service; enabled; vendor preset: enabled)
    Active: failed (Result: exit-code) since Thu 2023-07-27 10:49:07 CEST; 6s Aug
   Process: 17757 ExecStart=/opt/aws/amazon-cloudwatch-publisher/bin/amazon-cloudwatch-publisher (code=exited, status=216/GROUP)
  Main PID: 17757 (code=exited, status=216/GROUP)

Jul 27 10:49:07 pi-hole systemd[1]: Started amazon-cloudwatch-publisher.
Jul 27 10:49:07 pi-hole systemd[17757]: amazon-cloudwatch-publisher.service: Failed to determine group credentials: No such process
Jul 27 10:49:07 pi-hole systemd[17757]: amazon-cloudwatch-publisher.service: Failed at step GROUP spawning /opt/aws/amazon-cloudwatch-publisher/bin/amazon-cloudwatch-publisher: No such process
Jul 27 10:49:07 pi-hole systemd[1]: amazon-cloudwatch-publisher.service: Main process exited, code=exited, status=216/GROUP
Jul 27 10:49:07 pi-hole systemd[1]: amazon-cloudwatch-publisher.service: Failed with result 'exit-code'.
```
I configured the aws credentials to use access key and security key and not Cognito or IoT X.509.
Any idea what the problem might be?

Answer

Hi, 
code 216 is related to an issue in settings of the Linux group under which your service run.

See https://freedesktop.org/software/systemd/man/systemd.exec.html#Process%20Exit%20Codes

```
216	EXIT_GROUP	Failed to determine or change group credentials. See Group=/SupplementaryGroups= above. 
```

In the config of your amazon-cloudwatch-publisher.service with systemd, you have to define Linux user and group under which your service will run. You may not have defined group properly to reach this error and it leads you to this error.

Best

Didier

Install Cloudwatch Publisher on RaspberryPi

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