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Introduction

This chart bootstraps an init-agent for On-Demand Agents on a Kubernetes cluster using the Helm package manager.

Prerequisites

  • Kubernetes 1.8+ or newer

Configuration

The following tables lists the configurable parameters of the azdo-init-agent chart and their default values.

Parameter Description Default
image.repository init-agent image cizi/init-agent
image.tag Specify image tag latest
image.pullSecrets Specify image pull secrets nil (does not add image pull secrets to deployed pods)
image.pullPolicy Image pull policy Always
replicas Number of azdo-init-agent instaces started 3
azdoUrl Azure DevOps Url nil (must be provided during installation)
azdoToken Azure DevOps personal access token nil (must be provided during installation)
azdoPool Azure DevOps Agent pool name nil (must be provided during installation)
azdevopsWorkspace Azure DevOps Agent workspace /workspace

Prerequisite

  1. Create a personal access token with the authorized scope Agent Pools(read, manage) following these instructions. You will have to provide later the base64 encoded value of this token to the azdoToken value of the chart.

  2. Create a new agent pool. We will use the same agent pool name as a Kubernetes Namespace for our on-demand agents.

Installing the Chart

The chart can be installed with the following command:

export PAT_TOKEN=$(echo -n '<PAT TOKEN>' | base64)

helm install --namespace <AZDO_POOL> --set azdoToken=${PAT_TOKEN} --set azdoUrl=<AZDO_URL> --set azdoPool=<AZDO_POOL> -n azdo-init-agent  zeiss/azdo-init-agent  .

Your deployment should look like this if everything works fine:

kubectl get pods --namespace <NAMESPACE>
NAME           READY     STATUS    RESTARTS   AGE
azdo-agent-0   1/1       Running   0          1m
azdo-agent-1   1/1       Running   0          1m
azdo-agent-2   1/1       Running   0          1m

Scale up the number of Init agents

The number of Init agents can be easily increased to 5 by using the following command:

kubectl scale --namespace <AZDO_POOL> azdo-init-agent --replicas 5

Uninstalling the Chart

The chart can be uninstalled/deleted as follows:

helm uninstall -n <AZDO_POOL> azdo-init-agent

This command removes all the Kubernetes resources associated with the chart and deletes the helm release.