Kicking the tires of Prometheus using Docker on Fedora

Straight from the Prometheus documentation: "Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud."

I haven't had a chance to even take a look at using Prometheus.  Here I'll go over the steps I had to follow to get a working local Prometheus install monitoring my local Docker daemon so I could see metrics through the Prometheus dashboard.

First things first, here are the versions of what I am using (eh, until we find out what the problem is (listed below)):

• Fedora 25
• Docker
• docker-1.12.6-6.gitae7d637.fc25.x86_64
• docker-common-1.12.6-6.gitae7d637.fc25.x86_64
• docker-latest-1.12.6-2.git51ef5a8.fc25.x86_64
• Prometheus
• prom/prometheus b0195cb1a666

So, there were a couple of places I went for documentation to get started:

Prometheus

https://prometheus.io/docs/introduction/getting_started/

Docker

https://docs.docker.com/engine/admin/prometheus/

So, following those docs, I tried to use the default Fedora Docker configuration.  That did not work.  The Docker documentation was off, at least for the version of Docker I am using.  By default, in Fedora, you get a Docker package that is a bit out of date.  Here are the steps I took and what I had to do as a workaround.

Testing OpenShift on Openstack using Snapshots

The goal here is to allow me to test out OpenShift Container Platform on top of Red Hat OpenStack Platform.  I want to be able to build and tear down the environment quickly so I can check out different configurations.  OpenStack provides a way for me to do this via snapshots.

The first thing I did was upload a RHEL 7 image.  Then I booted and configured two servers from that image:

• Bastion Host
• Master-Infra-AppNode

To configure these servers, I followed the Red Hat Reference Architecture Red Hat OpenShift Container Platform 3 on Red Hat OpenStack Platform 8 up to page 47, right before deploying OpenShift Container Platform.  This allowed me to update the servers, configure the interfaces, sudo access, etc... Here are what my servers look like:

$ nova list
+--------------------------------------+---------------------------+---------+------------+-------------+------------------------------------------------------------------------+
| ID                                   | Name                      | Status  | Task State | Power State | Networks                                                               |
+--------------------------------------+---------------------------+---------+------------+-------------+------------------------------------------------------------------------+
| 82a42602-030f-4137-94bb-bac5f275dc1b | bastion-gold              | SHUTOFF | -          | Shutdown    | tenant-network=172.18.20.13; control-network=192.168.x.6, 10.19.x.80 |
| 17a505d0-9252-4a65-a0c8-196f6f25e605 | master-infra-appnode-gold | SHUTOFF | -          | Shutdown    | tenant-network=172.18.20.4; control-network=192.168.x.5, 10.19.x.53  |
+--------------------------------------+---------------------------+---------+------------+-------------+------------------------------------------------------------------------+

After the servers were configured, I shut them down and created an image from each of those servers called  "bastion-gold" image, and "master-infra-appnode-gold" image.  This will allow for me to create my OpenShift Container Platform environment from these images.  The steps I followed to create the snapshots are:

$ openstack server list
$ nova image-create --poll master-infra-appnode-gold sc-master-0.rhops.eng.x.x.redhat.com-snap
$ nova image-create --poll master-infra-appnode-gold sc-node-0.rhops.eng.x.x.redhat.com-snap
$ nova image-create --poll master-infra-appnode-gold sc-node-1.rhops.eng.x.x.redhat.com-snap
$ nova image-create --poll bastion-gold sc-bastion.rhops.eng.x.x.redhat.com-snap