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cluster-logging-operator

An operator to support OKD aggregated cluster logging. Cluster logging configuration information is found in the configuration documentation.

Quick Start

To get started with cluster logging and the cluster-logging-operator:

  • Ensure Docker is installed on your local system
$ oc login $CLUSTER -u $ADMIN_USER -p $ADMIN_PASSWD
$ REMOTE_CLUSTER=true make deploy-example

This will stand up a cluster logging stack named 'example'.

Hacking

Building a Universal Base Image (UBI) based image

You must first oc login api.ci.openshift.org. You'll need these credentials in order to pull images from the UBI registry.

The image build process for UBI based images uses a private yum repo. In order to use the private yum repo, you will need access to https://github.com/openshift/release/blob/master/ci-operator/infra/openshift/release-controller/repos/ocp-4.1-default.repo and https://github.com/openshift/shared-secrets/blob/master/mirror/ops-mirror.pem Note that the latter is private and requires special permission to access.

The best approach is to clone these repos under $GOPATH/src/github.com/openshift which the build scripts will pick up automatically. If you do not, the build script will attempt to clone them to a temporary directory.

Running a full integration test with a 4.x cluster

If you have a local clone of origin-aggregated-logging under $GOPATH/github.com/openshift/origin-aggregated-logging you can use its hack/get-cluster-run-tests.sh to build the logging, elasticsearch-operator, and cluster-logging-operator images; deploy a 4.x cluster; push the images to the cluster; deploy logging; and launch the logging CI tests.

Running the operator

Running locally outside an OKD cluster:

 $ make run

make targets

Various make targets are included to simplify building and deploying the operator from the repository root directory, all of which are not listed here. Hacking and deploying the operator assumes:

  • a running OKD cluster
  • oc binary in your $PATH
  • Logged into a cluster with an admin user who has the cluster role of cluster-admin
  • Access to a clone of the openshift/elasticsearch-operator repository
  • make targets are executed from the openshift/cluster-logging-operator root directory
  • various other commands such as imagebuilder and operator-sdk. The sdk_setup.sh will setup your environment.

The deployment can be optionally modified using any of the following:

Env Var Default Description
IMAGE_BUILDER imagebuilder The command to build the container image
EXCLUSIONS none The list of manifest files that should will be ignored
OC oc in PATH The openshift binary to use to deploy resources
REMOTE_REGISTRY false true if you are running the cluster on a different machine than the one you are developing on
PUSH_USER none The name of the user e.g. kubeadmin used to push images to the remote registry
PUSH_PASSWORD none The password for PUSH_USER
SKIP_BUILD false true if you are pushing an image to a remote registry and want to skip building it again

Note: Use REMOTE_REGISTRY=true, for example, if you are running a cluster in a local libvirt or minishift environment; you may want to build the image on the host and push them to the cluster running in the VM. This requires a username with a password (i.e. not the default system:admin user). If your cluster was deployed with the allow_all identity provider, you can: create a user and assign it rights:

    oc login --username=admin --password=admin
    oc adm policy add-cluster-role-to-user cluster-admin admin

If you used the new openshift-installer, it creates a user named kubeadmin with the password in the file installer/auth/kubeadmin_password.

To push the image to the remote registry, set REMOTE_REGISTRY=true, PUSH_USER=kubeadmin, KUBECONFIG=/path/to/installer/auth/kubeconfig, and PUSH_PASSWORD=$( cat /path/to/installer/auth/kubeadmin_password ). You do not have to oc login to the cluster. If you already built the image, use SKIP_BUILD=true to do a push only.

REMOTE_REGISTRY=true PUSH_USER=kubeadmin SKIP_BUILD=true \
KUBECONFIG=/path/to/installer/auth/kubeconfig \
PUSH_PASSWORD=$( cat /path/to/installer/auth/kubeadmin_password ) \
make deploy-image

Note: If you are using REMOTE_REGISTRY=true, ensure you have docker package installed and docker daemon up and running on the workstation you are running these commands. Also ensure you have podman (docker may be deprecated in the future).

Note: If while hacking you find your changes are not being applied, use docker images to see if there is a local version of the cluster-logging-operator on your machine which may being used by the cluster instead of the one pushed to the docker registry. You may need to delete it (e.g. docker rmi $IMAGE)

Following is a list of some of the existing make targets to facilitate deployment:

Target Description
deploy-example Deploys all resources and creates an instance of the cluster-logging-operator, creates a ClusterLogging custom resource named example, starts the Elasticsearch, Kibana, and Fluentd pods running.
deploy Deploys all resources and creates an instance of the cluster-logging-operator, but does not create the CR nor start the components running.
undeploy Removes all cluster-logging resources and openshift-logging project
deploy-setup Setup the OKD cluster to support cluster-logging without deploying an instance of the cluster-logging-operator
deploy-image If you already have a remote cluster, and you just want to rebuild and redeploy the image to the remote cluster. Use make image instead if you only want to build the image but not push it.
deploy-no-build Same as deploy but does not build the image first - assumes you have already built the image
deploy-example-no-build Same as deploy-example but does not build the image first - assumes you have already built the image

Testing

E2E Testing

This test assumes:

  • the cluster-logging-operator image is available
  • the cluster-logging component images are available (i.e. $docker_registry_ip/openshift/$component)

Note: This test will fail if the images are not pushed to the cluster on which the operator runs or can be pulled from a visible registry.

Note: It is necessary to set the IMAGE_CLUSTER_LOGGING_OPERATOR environment variable to a valid pull spec in order to run this test against local changes to the cluster-logging-operator. For example:

$ make deploy-image && IMAGE_CLUSTER_LOGGING_OPERATOR=image-registry.openshift-image-registry.svc:5000/openshift/origin-cluster-logging-operator:latest make test-e2e