Outcold Solutions LLC

Monitoring OpenShift - Version 3

You are looking at documentation for an older release. See the current release documentation.

Configuration

To find server version of your OpenShift cluster use

$ oc version

Match the server version with one of the links below. If you are using version, which is not in this list you can try the closest version.

If you are using version, which is not on the list, please email us contact@outcoldsolutions.com

Using images on hub.docker.com

These images are build on top of Alpine linux

Using certified images on registry.connect.redhat.com

These images are built on top of RHEL images, see outcoldsolutions/collectorforopenshift. To pull images from this registry you need to authenticate, see instructions below.

registry.connect.redhat.com authentication

registry.connect.redhat.com is not the same as registry.access.redhat.com, second is used for Red Hat images, first is used for certified images from partners. Second works with OpenShift cluster out of the box, first requires authentication.

You need to specify secret to authenticate with registry.connect.redhat.com. Please follow the link to learn how to use other secured registries. Allowing Pods to Reference Images from Other Secured Registries

This is an example how you can authenticate with registry.connect.redhat.com.

After applying the configuration to your OpenShift cluster you need to create a secret for pulling images from Red Hat registry. Make sure you are in the same project/namespace as where collector is created (default is a default project/namespace).

$ oc project default

If you are on Linux (for macOS see below), you can login to the registry using docker and use authentication file to create a secret in OpenShift cluster.

$ docker login registry.connect.redhat.com
Username: [redhat-username]
Password: [redhat-user-password]
Login Succeeded

Make sure to use username and not email, when you login to this registry. They both allows you to login. But if you logged in with email, you will not be able to download the image.

After that you can create a secret for pulling images using just created authentication under $HOME/.docker/config.json

$ oc secrets new rhcc .dockerconfigjson=$HOME/.docker/config.json

On macOS Docker does not store authentication data in config.json (stores in keychain instead). You cannot use it to create a secret. Instead you can create a secret from the command line with oc secrets new-dockercfg rhcc --docker-server=registry.connect.redhat.com --docker-username=<user_name> --docker-password=<password> --docker-email=<email>. Just make sure this command is not going to be saved in the bash history, as it is going to have a password in the command line. See Execute command without keeping it in history. You can execute export HISTFILE=/dev/null in this terminal session, which will stop recording any commands in history.

Link created secret rhcc to the service account we use for collector collectorforopenshift

$ oc secrets link collectorforopenshift rhcc --for=pull

Give it few moments to pull the image (can take up to few minutes)


About Outcold Solutions

Outcold Solutions provides solutions for monitoring Kubernetes, OpenShift and Docker clusters in Splunk Enterprise and Splunk Cloud. We offer certified Splunk applications, which give you insights across all containers environments. We are helping businesses reduce complexity related to logging and monitoring by providing easy-to-use and deploy solutions for Linux and Windows containers. We deliver applications, which help developers monitor their applications and operators to keep their clusters healthy. With the power of Splunk Enterprise and Splunk Cloud, we offer one solution to help you keep all the metrics and logs in one place, allowing you to quickly address complex questions on container performance.