Deploy OneAgent Operator on Kubernetes (deprecated)

This procedure is deprecated.

If you are making a fresh installation, you should set up Kubernetes monitoring using Dynatrace Operator.
If you already have OneAgent installed using OneAgent Operator, please see the instructions for migrating to Dynatrace Operator.

Installation

Find out below how to install and configure OneAgent.

Prerequisites

Generate an API token and a PaaS token in your Dynatrace environment.
Make sure you have the Access problem and event feed, metrics, and topology setting enabled for the API token.
Pods must allow egress to your Dynatrace environment or to your Environment ActiveGate in order for metric routing to work properly.
See Support lifecycle for supported Kubernetes versions.

Create the necessary objects for OneAgent Operator.

OneAgent Operator acts on its separate namespace dynatrace. It holds the operator deployment and all dependent objects like permissions, custom resources and the corresponding DaemonSet. You can also observe the logs of OneAgent Operator.
```
kubectl create namespace dynatrace
```
```
kubectl apply -f https://github.com/Dynatrace/dynatrace-oneagent-operator/releases/latest/download/kubernetes.yaml
```
```
kubectl -n dynatrace logs -f deployment/dynatrace-oneagent-operator
```
Create the secret holding API and PaaS tokens for authentication to the Dynatrace Cluster.

The name of the secret is important in a later step when you configure the custom resource (.spec.tokens). In the following code-snippet the name is oneagent. Be sure to replace API_TOKEN and PAAS_TOKEN with the values explained in the prerequisites.
```
kubectl -n dynatrace create secret generic oneagent --from-literal="apiToken=API_TOKEN" --from-literal="paasToken=PAAS_TOKEN"
```
Save custom resource.

The rollout of Dynatrace OneAgent is governed by a custom resource of type OneAgent. Retrieve the cr.yaml file from the GitHub repository.
```
curl -o cr.yaml https://raw.githubusercontent.com/Dynatrace/dynatrace-oneagent-operator/master/deploy/cr.yaml
```
Adapt the values of the custom resource as indicated below.
If you want to revert an argument, you need to set it to empty instead of removing it from the custom resource.
Example:
args:
- "--set-proxy="
Parameter
Description
Default value
apiUrl
required
For Dynatrace SaaS, where OneAgent can connect to the internet, replace the Dynatrace ENVIRONMENTID in https://ENVIRONMENTID.live.dynatrace.com/api.
For Environment ActiveGates (SaaS or Managed), use the following to download the OneAgent, as well as to communicate OneAgent traffic through the ActiveGate: https://YourActiveGateIP or FQDN:9999/e/<ENVIRONMENTID>/api.
useUnprivilegedMode
optional Set to false if you want to mark the pod as privileged. Defaults to using Linux capabilities for the OneAgent pod
true
tokens
optional Name of the secret that holds the API and PaaS tokens from above.
Name of custom resource (.metadata.name) if unset
useImmutableImage
optional Set to true if you want to pull a OneAgent Docker image from your Dynatrace environment. Use this parameter together with the agentVersion parameter to control the version of OneAgent.
false
agentVersion
optional Set this value to the OneAgent version using semantic versioning (major.minor.patch). Example: 1.203.0
latest version
args
optional Parameters to be passed to the OneAgent installer. All the command line parameters of the installer are supported, with the exception of INSTALL_PATH.
env
optional Environment variables for OneAgent container.
skipCertCheck
optional Disable certificate validation checks for installer download and API communication. Set to true if you want to skip any certification validation checks.
false
nodeSelector
optional Keep empty default value. If you want to roll out OneAgent to specific nodes only, provide the nodeSelectors here. Refer to Kubernetes docs for details.
tolerations
optional Keep default value to also roll out the OneAgent to primary nodes if possible. If you want to apply additional tolerations to OneAgent pods for tainted nodes, provide them here. Refer to Kubernetes docs for details.
image
optional Define the OneAgent image to be taken. Defaults to the publicly available OneAgent image on Docker Hub. In order to use the certified OneAgent image from Red Hat Container Catalog you need to set .spec.image to registry.connect.redhat.com/dynatrace/oneagent in the custom resource and provide image pull secrets as shown in the next step.
docker.io/dynatrace/oneagent:latest if unset
resources
optional Resource requests/limits for the OneAgent pods. These settings heavily depend on size of worker nodes and workloads. Please adjust to fit your needs.
priorityClassName
optional Priority class for OneAgent pod. Refer to Kubernetes docs.
disableAgentUpdate
optional Disable the Operator's auto-update feature for OneAgent pods.
false
enableIstio
optional Enable management of Istio service entries and virtual services for Dynatrace endpoints to allow for OneAgent monitoring egress traffic to your Dynatrace environment
false
trustedCAs
optional Adds the provided CA certficates to the Operator and the OneAgent; provide the name of the configmap which holds your PEM in a field called certs.
If not set, the default embedded certificates on the images will be used.
Configuration for Anthos, SUSE CaaS, GKE, IKS, and TKGI
For Anthos, SUSE CaaS, Google Kubernetes Engine, and VMware Tanzu Kubernetes Grid Integrated Edition (formerly PKE), you must add the following additional parameters to the env section in the cr.yaml file:
env:
- name: ONEAGENT_ENABLE_VOLUME_STORAGE
value: "true"
env:
- name: ONEAGENT_ENABLE_VOLUME_STORAGE
value: "true"
- name: ONEAGENT_CONTAINER_STORAGE_PATH
value: /var/vcap/store
env:
- name: ONEAGENT_ENABLE_VOLUME_STORAGE
value: "true"
- name: ONEAGENT_CONTAINER_STORAGE_PATH
value: /opt
env:
- name: ONEAGENT_ENABLE_VOLUME_STORAGE
value: "true"
Create the custom resource.
```
kubectl apply -f cr.yaml
```

optional Configure proxy.

You can configure optional parameters like proxy settings in the cr.yaml file in order to
- download the OneAgent installer
- ensure the communication between the OneAgent and your Dynatrace environment
- ensure the communication between the Dynatrace OneAgent Operator and the Dynatrace API.

There are two ways to provide the proxy, depending on whether or not your proxy uses credentials.

If you have a proxy that doesn't use credentials, enter your proxy URL directly in the value field for the proxy.

Example

apiVersion: dynatrace.com/v1alpha1
kind: OneAgent
metadata:
  name: oneagent
  namespace: dynatrace
spec:
  apiUrl: https://environmentid.dynatrace.com/api
  tolerations:
  - effect: NoSchedule
    key: node-role.kubernetes.io/master
    operator: Exists
  args: []
  enableIstio: true
  proxy:
    value: http://mysuperproxy

If your proxy uses credentials

Create a secret with a field called proxy which holds your encrypted proxy URL with the credentials.
Example.

kubectl -n dynatrace create secret generic myproxysecret --from-literal="proxy=http://<user>:<password>@<IP>:<PORT>"

Provide the name of the secret in the valueFrom section.
Example.

apiVersion: dynatrace.com/v1alpha1
kind: OneAgent
metadata:
  name: oneagent
  namespace: dynatrace
spec:
  apiUrl: https://environmentid.dynatrace.com/api
  tolerations:
  - effect: NoSchedule
    key: node-role.kubernetes.io/master
    operator: Exists
  args: []
  enableIstio: true
  proxy:
    valueFrom: myproxysecret

optional Configure network zones.

You can configure network zones by setting the following argument:
```
args:
  - --set-network-zone=<your.network.zone>
```
See network zones for more information.

Prerequisites

Generate an API token and a PaaS token in your Dynatrace environment.

Make sure you have the Access problem and event feed, metrics, and topology setting enabled for the API token.
Pods must allow egress to your Dynatrace environment or to your Environment ActiveGate in order for metric routing to work properly.
See Support lifecycle for supported Kubernetes versions.
Install Helm version 3.

Add the Dynatrace OneAgent Helm repository.

helm repo add dynatrace \
https://raw.githubusercontent.com/Dynatrace/helm-charts/master/repos/stable

Create a Dynatrace namespace.

The Dynatrace OneAgent Operator acts on its separate namespace called dynatrace, which holds the operator deployment and all dependent objects like permissions, custom resources, and corresponding DaemonSets.
```
kubectl create namespace dynatrace
```
Create the custom resource definitions.

kubectl apply -f https://github.com/Dynatrace/dynatrace-oneagent-operator/releases/latest/download/dynatrace.com_oneagents.yaml
kubectl apply -f https://github.com/Dynatrace/dynatrace-oneagent-operator/releases/latest/download/dynatrace.com_oneagentapms.yaml

Create a values.yaml file with the following content.

platform: "kubernetes"
operator:
  image: ""
oneagent:
  name: "oneagent"
  apiUrl: "https://ENVIRONMENTID.live.dynatrace.com/api"
  image: ""
  args: {}
  env: {}
  nodeSelector: {}
  labels: {}
  skipCertCheck: false
  disableAgentUpdate: false
  enableIstio: false
  dnsPolicy: ""
  resources: {}
  waitReadySeconds: null
  priorityClassName: ""
  serviceAccountName: ""
  proxy: ""
  trustedCAs: ""
secret:
  apiToken: "DYNATRACE_API_TOKEN"
  paasToken: "PLATFORM_AS_A_SERVICE_TOKEN"

The OneAgent proxy setting is used by both the Operator and the OneAgent containers when communicating to the Dynatrace environment.

Configuration for Anthos, SUSE CaaS, GKE, IKS, and TKGI

For Anthos, SUSE CaaS, Google Kubernetes Engine, and VMware Tanzu Kubernetes Grid Integrated Edition (formerly PKE), you must add the following additional parameters to the env section in the values.yaml file:

env:
    - name: ONEAGENT_ENABLE_VOLUME_STORAGE
      value: "true"

env:
    - name: ONEAGENT_ENABLE_VOLUME_STORAGE
      value: "true"
    - name: ONEAGENT_CONTAINER_STORAGE_PATH
      value: /var/vcap/store

env:
    - name: ONEAGENT_ENABLE_VOLUME_STORAGE
      value: "true"
    - name: ONEAGENT_CONTAINER_STORAGE_PATH
      value: /opt

optional Configure network zones.

You can configure network zones by setting the following argument:
```
args:
  - --set-network-zone=<your.network.zone>
```
See network zones for more information.

To apply the YAML parameters, run the following command:

helm install dynatrace-oneagent-operator \
dynatrace/dynatrace-oneagent-operator -n\
dynatrace --values values.yaml

After deployment, you need to restart your pods so OneAgent can inject into them.

Cluster-wide permissions

The following table shows the permissions needed for OneAgent Operator.

Resources accessed

APIs used

Resource names

Nodes

Get/List/Watch

Namespaces

Get/List/Watch

Secrets

Create

Secrets

Get/Update/Delete

dynatrace-oneagent-config, dynatrace-oneagent-pull-secret

Limitations

See Docker limitations for details.

Troubleshoot

Find out how to troubleshoot issues that you may encounter when deploying OneAgent on Kubernetes.

Deploy an ActiveGate and connect your Kubernetes API to Dynatrace

Now that you have OneAgent running on your Kubernetes nodes, you're able to monitor those nodes, and the applications running in Kubernetes. The next step is to deploy an ActiveGate and connect your Kubernetes API to Dynatrace in order to get native Kubernetes metrics, like request limits, and differences in pods requested vs. running pods.
For further instructions see Deploy ActiveGate in Kubernetes as a StatefulSet.

Update OneAgent Operator with kubectl

OneAgent Operator (for Kubernetes version 1.9+) automatically takes care of the lifecycle of the deployed OneAgents, so you don't need to update OneAgent pods yourself.

Review the release notes of the Operator for any breaking changes on the custom resource.

If the custom resource of the new version is compatible with the already deployed version, you can simply set the OneAgent Operator image to the new tagged version. Be sure to replace vX.Y.Z with the new version in the following command:

kubectl -n dynatrace set image deployment \
dynatrace-oneagent-operator *=quay.io/dynatrace/\
dynatrace-oneagent-operator:vX.Y.Z

The image version of the OneAgent Operator is independent from the OneAgent version. To check the available versions for the Operator, see the OneAgent Operator releases.

To update OneAgent Operator, run the following command:

kubectl apply -f https://github.com/Dynatrace/dynatrace-oneagent-operator/releases/latest/download/kubernetes.yaml

Update OneAgent Operator with Helm

Update your Helm repositories.
```
helm repo update
```
Another method of updating the Dynatrace OneAgent Helm repository is adding it again, which overwrites the older version.
Update OneAgent to the latest version.

Don't omit the --reuse-values flag in the command in order to keep your configuration.
```
helm upgrade dynatrace-oneagent-operator dynatrace/\
dynatrace-oneagent-operator -n dynatrace --reuse-values
```

Uninstall OneAgent Operator

To uninstall OneAgent Operator from Kubernetes version 1.9+

Remove OneAgent custom resources and clean up all remaining OneAgent Operator–specific objects.

kubectl delete -n dynatrace oneagent --all
kubectl delete -f https://github.com/Dynatrace/dynatrace-oneagent-operator/releases/latest/download/kubernetes.yaml

optional After deleting OneAgent Operator, the OneAgent binary remains on the node in an inactive state. To uninstall it completely, run the uninstall.sh script and delete logs and configuration files.
See Linux related information.

Remove OneAgent custom resources and clean up all remaining OneAgent Operator–specific objects:

helm uninstall dynatrace-oneagent-operator -n dynatrace