Config

ORKESTRA_KUBE_URI: The URI of the Kubernetes API. Required.
ORKESTRA_ELASTICSEARCH_URI: The URI of Elasticsearch for the backend storage. Required.
ORKESTRA_BIND_PORT: Port to bind the API and UI on. Default: 8080.
ORKESTRA_NAMESPACE: Orkestra needs to know in which namespace it lives in. Required.
The easiest way is giving it via the downward API:
```
- name: ORKESTRA_NAMESPACE
  valueFrom:
    fieldRef:
      fieldPath: metadata.namespace
```
ORKESTRA_POD_NAME: Orkestra needs to know the name of pod it runs in. Required.
The easiest way is giving it via the downward API:
```
- name: ORKESTRA_POD_NAME
  valueFrom:
    fieldRef:
      fieldPath: metadata.name
```
ORKESTRA_WORKSPACE: If you’d like you can change the default workspace where the jobs will run in. Required. Default /opt/docker/workspace.
ORKESTRA_BASEPATH: If the UI is accessed form a sub path we need to make Orkestra aware of it. Optional.

Deployment config

The deployment can be done via Kubernetes Deployments.

First we create a namespace where we will be deploying everything:

apiVersion: v1
kind: Namespace
metadata:
  name: orkestra

Then we need to have Elasticsearch running so that Orkestra can store and query the data related to the runs of jobs (logs, times, parameters…). The following one is deploying a single node which is fine for dev purpose but you might want to have a cluster of at least 3 nodes to be HA and failure resilient:

apiVersion: v1
kind: Service
metadata:
  name: elasticsearch
  namespace: orkestra
spec:
  selector:
    app: elasticsearch
  clusterIP: None
  ports:
  - port: 9200
    targetPort: 9200

---
apiVersion: v1
kind: Service
metadata:
  name: elasticsearch-internal
  namespace: orkestra
spec:
  selector:
    app: elasticsearch
  clusterIP: None
  ports:
  - port: 9300
    targetPort: 9300

---
apiVersion: apps/v1beta2
kind: StatefulSet
metadata:
  name: elasticsearch
  namespace: orkestra
spec:
  selector:
    matchLabels:
      app: elasticsearch
  serviceName: elasticsearch-internal
  replicas: 1
  template:
    metadata:
      labels:
        app: elasticsearch
    spec:
      initContainers:
      - name: init-sysctl
        image: busybox:1.27.2
        command:
        - sysctl
        - -w
        - vm.max_map_count=262144
        securityContext:
          privileged: true
      containers:
      - name: elasticsearch
        image: docker.elastic.co/elasticsearch/elasticsearch-oss:6.1.1
        env:
        - name: cluster.name
          value: orkestra
        - name: node.name
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: discovery.zen.ping.unicast.hosts
          value: elasticsearch-internal
        volumeMounts:
        - name: data
          mountPath: /usr/share/elasticsearch/data
      volumes:
      - name: data
        emptyDir: {}

Now we can deploy Orkestra:

apiVersion: v1
kind: Service
metadata:
  name: orkestra
  namespace: orkestra
spec:
  selector:
    app: orkestra
  ports:
  - name: http
    port: 80
    targetPort: 8080
  - name: github
    port: 81
    targetPort: 8081

---
apiVersion: apps/v1beta2
kind: Deployment
metadata:
  name: orkestra
  namespace: orkestra
spec:
  replicas: 1
  selector:
    matchLabels:
      app: orkestra
  template:
    metadata:
      labels:
        app: orkestra
    spec:
      containers:
      - name: orkestra
        image: orkestra:0.1.0-SNAPSHOT
        imagePullPolicy: IfNotPresent
        env:
        - name: ORKESTRA_KUBE_URI
          value: https://kubernetes.default
        - name: ORKESTRA_ELASTICSEARCH_URI
          value: elasticsearch://elasticsearch:9200
        - name: ORKESTRA_BASEPATH
          value: /api/v1/namespaces/orkestra/services/orkestra:http/proxy
        - name: ORKESTRA_POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: ORKESTRA_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace