Instana

Introduction

Instana is an APM solution built for microservices that enables IT Ops to build applications faster and deliver higher quality services by automating monitoring, tracing and root cause analysis. The solution is optimized for Kubernetes and OpenShift.

Instana Agent Operator

This repository contains the Kubernetes Operator to install and manage the Instana agent.

Installing

There are two ways to install the operator:

• Creating the required resources manually
• Using the Operator Lifecycle Manager (OLM)

IMPORTANT NOTE For the conversion Mutating WebHook, converting older v1beta1 Specs to v1 Spec, the Cert-Manager needs to be installed (unless using OLM). See the Cert Manager docs for how to install and configure the Cert-Manager properly. Alternatively, every release will include the instana-agent-operator-no-conversion-webhook.yaml variant for easily installing the Operator without the conversion WebHook.

Configuration

This documentation section describes configuration options you can set via the Instana Agent CRD and environment variables.

Building

• docs/build.md describes how to build the Docker image from source code.
• docs/testing-with-kind.md shows how to test the operator in a local Kind cluster.
• docs/run-operator-registry-locally.md describes how to set up a local Operator Lifecycle Manager and Registry to test the OLM deployment locally.

Contributing

Please see the guidelines in CONTRIBUTING.md.

Local Development

Developing (and running) the Operator is possible in two easy ways:

• Running as Go application outside the Cluster
• Running as Deployment inside the Cluster

Both are described below.

Running Go Operator locally against a K8s cluster

1. Create a copy of the file config/samples/instana_v1_instanaagent.yaml, for the below steps we're assuming config/samples/instana_v1_instanaagent_demo.yaml.yaml
2. In this file, put correct values for e.g. the Agent key, endpointHost and endpointPort.
3. Install the CRD and run the Go application: make install run.
4. Deploy the custom resource earlier created using kubectl apply -f config/samples/instana_v1_instanaagent_demo.yaml

To stop, take the following actions:

• kubectl delete -f config/samples/instana_v1_instanaagent_demo.yaml
• make uninstall

Running Deployment inside the cluster

The Instana Agent Operator can be developed and tested easily against a local Minikube cluster or any other configured Kubernetes cluster. Therefore, follow the below steps:

1. Create a copy of the file config/samples/instana_v1_instanaagent.yaml, for the below steps we're assuming config/samples/instana_v1_instanaagent_demo.yaml.yaml
2. In this file, put correct values for e.g. the Agent key, endpointHost and endpointPort.
3. Build the Operator image: make docker-build
4. For deploying on Minikube, there's a convenient target make deploy-minikube. For any other environment you would need to first push the Docker image to a valid repository using make docker-push, then do the deployment using make deploy to deploy the Operator to the cluster configured for kubectl.
5. Deploy the custom resource earlier created using kubectl apply -f config/samples/instana_v1_instanaagent_demo.yaml.yaml

Now you should have a successful running Operator. To remove the Operator again, run:

• kubectl delete -f config/samples/instana_v1_instanaagent_demo.yaml.yaml
• make undeploy.