K8 Deployment¶

The following steps are provided for reference purposes only. Depending on the specifics of your k8 configuration, you may need to make modifications to the steps or files as necessary.

Requirements¶

Kompose: v1.25 or higher

Download and untar Harvest¶

Download the latest version of Harvest, untar, and cd into the harvest directory.

Local k8 Deployment¶

To run Harvest resources in Kubernetes, please execute the following commands:

After adding your clusters to harvest.yml, generate harvest-compose.yml and prom-stack.yml.

bin/harvest generate docker full --port --output harvest-compose.yml

example harvest.yml

Tools:
Exporters:
    prometheus1:
        exporter: Prometheus
        port_range: 12990-14000
Defaults:
    use_insecure_tls: true
    collectors:
      - Zapi
      - ZapiPerf
    exporters:
      - prometheus1
Pollers:
    u2:
        datacenter: u2
        addr: ADDRESS
        username: USER
        password: PASS

harvest-compose.yml

version: "3.7"

services:

  u2:
    image: ghcr.io/netapp/harvest:latest
    container_name: poller-u2
    restart: unless-stopped
    ports:
      - 12990:12990
    command: '--poller u2 --promPort 12990 --config /opt/harvest.yml'
    volumes:
      - /Users/harvest/conf:/opt/harvest/conf
      - /Users/harvest/cert:/opt/harvest/cert
      - /Users/harvest/harvest.yml:/opt/harvest.yml
    networks:
      - backend

Using kompose, convert harvest-compose.yml and prom-stack.yml into Kubernetes resources and save them as kub.yaml.

kompose convert --file harvest-compose.yml --file prom-stack.yml --out kub.yaml --volumes hostPath

kub.yaml

---
apiVersion: v1
kind: Service
metadata:
  annotations:
    kompose.cmd: kompose convert --file harvest-compose.yml --file prom-stack.yml --out kub.yaml --volumes hostPath
    kompose.service.type: nodeport
    kompose.version: 1.28.0 (HEAD)
  creationTimestamp: null
  labels:
    io.kompose.service: grafana
  name: grafana
spec:
  ports:
    - name: "3000"
      port: 3000
      targetPort: 3000
  selector:
    io.kompose.service: grafana
  type: NodePort
status:
  loadBalancer: {}

---
apiVersion: v1
kind: Service
metadata:
  annotations:
    kompose.cmd: kompose convert --file harvest-compose.yml --file prom-stack.yml --out kub.yaml --volumes hostPath
    kompose.service.type: nodeport
    kompose.version: 1.28.0 (HEAD)
  creationTimestamp: null
  labels:
    io.kompose.service: prometheus
  name: prometheus
spec:
  ports:
    - name: "9090"
      port: 9090
      targetPort: 9090
  selector:
    io.kompose.service: prometheus
  type: NodePort
status:
  loadBalancer: {}

---
apiVersion: v1
kind: Service
metadata:
  annotations:
    kompose.cmd: kompose convert --file harvest-compose.yml --file prom-stack.yml --out kub.yaml --volumes hostPath
    kompose.version: 1.28.0 (HEAD)
  creationTimestamp: null
  labels:
    io.kompose.service: u2
  name: u2
spec:
  ports:
    - name: "12990"
      port: 12990
      targetPort: 12990
  selector:
    io.kompose.service: u2
status:
  loadBalancer: {}

---
apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    kompose.cmd: kompose convert --file harvest-compose.yml --file prom-stack.yml --out kub.yaml --volumes hostPath
    kompose.service.type: nodeport
    kompose.version: 1.28.0 (HEAD)
  creationTimestamp: null
  labels:
    io.kompose.service: grafana
  name: grafana
spec:
  replicas: 1
  selector:
    matchLabels:
      io.kompose.service: grafana
  strategy:
    type: Recreate
  template:
    metadata:
      annotations:
        kompose.cmd: kompose convert --file harvest-compose.yml --file prom-stack.yml --out kub.yaml --volumes hostPath
        kompose.service.type: nodeport
        kompose.version: 1.28.0 (HEAD)
      creationTimestamp: null
      labels:
        io.kompose.network/harvest-backend: "true"
        io.kompose.network/harvest-frontend: "true"
        io.kompose.service: grafana
    spec:
      containers:
        - image: grafana/grafana:8.3.4
          name: grafana
          ports:
            - containerPort: 3000
          resources: {}
          volumeMounts:
            - mountPath: /var/lib/grafana
              name: grafana-data
            - mountPath: /etc/grafana/provisioning
              name: grafana-hostpath1
      restartPolicy: Always
      volumes:
        - hostPath:
            path: /Users/harvest
          name: grafana-data
        - hostPath:
            path: /Users/harvest/grafana
          name: grafana-hostpath1
status: {}

---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  creationTimestamp: null
  name: harvest-backend
spec:
  ingress:
    - from:
        - podSelector:
            matchLabels:
              io.kompose.network/harvest-backend: "true"
  podSelector:
    matchLabels:
      io.kompose.network/harvest-backend: "true"

---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  creationTimestamp: null
  name: harvest-frontend
spec:
  ingress:
    - from:
        - podSelector:
            matchLabels:
              io.kompose.network/harvest-frontend: "true"
  podSelector:
    matchLabels:
      io.kompose.network/harvest-frontend: "true"

---
apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    kompose.cmd: kompose convert --file harvest-compose.yml --file prom-stack.yml --out kub.yaml --volumes hostPath
    kompose.service.type: nodeport
    kompose.version: 1.28.0 (HEAD)
  creationTimestamp: null
  labels:
    io.kompose.service: prometheus
  name: prometheus
spec:
  replicas: 1
  selector:
    matchLabels:
      io.kompose.service: prometheus
  strategy:
    type: Recreate
  template:
    metadata:
      annotations:
        kompose.cmd: kompose convert --file harvest-compose.yml --file prom-stack.yml --out kub.yaml --volumes hostPath
        kompose.service.type: nodeport
        kompose.version: 1.28.0 (HEAD)
      creationTimestamp: null
      labels:
        io.kompose.network/harvest-backend: "true"
        io.kompose.service: prometheus
    spec:
      containers:
        - args:
            - --config.file=/etc/prometheus/prometheus.yml
            - --storage.tsdb.path=/prometheus
            - --web.console.libraries=/usr/share/prometheus/console_libraries
            - --web.console.templates=/usr/share/prometheus/consoles
          image: prom/prometheus:v2.33.1
          name: prometheus
          ports:
            - containerPort: 9090
          resources: {}
          volumeMounts:
            - mountPath: /etc/prometheus
              name: prometheus-hostpath0
            - mountPath: /prometheus
              name: prometheus-data
      restartPolicy: Always
      volumes:
        - hostPath:
            path: /Users/harvest/container/prometheus
          name: prometheus-hostpath0
        - hostPath:
            path: /Users/harvest
          name: prometheus-data
status: {}

---
apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    kompose.cmd: kompose convert --file harvest-compose.yml --file prom-stack.yml --out kub.yaml --volumes hostPath
    kompose.version: 1.28.0 (HEAD)
  creationTimestamp: null
  labels:
    io.kompose.service: u2
  name: u2
spec:
  replicas: 1
  selector:
    matchLabels:
      io.kompose.service: u2
  strategy:
    type: Recreate
  template:
    metadata:
      annotations:
        kompose.cmd: kompose convert --file harvest-compose.yml --file prom-stack.yml --out kub.yaml --volumes hostPath
        kompose.version: 1.28.0 (HEAD)
      creationTimestamp: null
      labels:
        io.kompose.network/harvest-backend: "true"
        io.kompose.service: u2
    spec:
      containers:
        - args:
            - --poller
            - u2
            - --promPort
            - "12990"
            - --config
            - /opt/harvest.yml
          image: ghcr.io/netapp/harvest:latest
          name: poller-u2
          ports:
            - containerPort: 12990
          resources: {}
          volumeMounts:
            - mountPath: /opt/harvest/conf
              name: u2-hostpath0
            - mountPath: /opt/harvest/cert
              name: u2-hostpath1
            - mountPath: /opt/harvest.yml
              name: u2-hostpath2
      restartPolicy: Always
      volumes:
        - hostPath:
            path: /Users/harvest/conf
          name: u2-hostpath0
        - hostPath:
            path: /Users/harvest/cert
          name: u2-hostpath1
        - hostPath:
            path: /Users/harvest/harvest.yml
          name: u2-hostpath2
status: {}

Apply kub.yaml to k8.

kubectl apply --filename kub.yaml

List running pods.

kubectl get pods

pods

NAME                          READY   STATUS    RESTARTS   AGE
prometheus-666fc7b64d-xfkvk   1/1     Running   0          43m
grafana-7cd8bdc9c9-wmsxh      1/1     Running   0          43m
u2-7dfb76b5f6-zbfm6           1/1     Running   0          43m

Remove all Harvest resources from k8¶

kubectl delete --filename kub.yaml

Helm Chart¶

Generate helm charts

kompose convert --file harvest-compose.yml --file prom-stack.yml --chart --volumes hostPath --out harvestchart

Cloud Deployment¶

We will use configMap to generate Kubernetes resources for deploying Harvest pollers in a cloud environment. Please note the following assumptions for the steps below:

The steps provided are solely for the deployment of Harvest poller pods. Separate configurations are required to set up Prometheus and Grafana.
Networking between Harvest and Prometheus must be configured, and this can be accomplished by adding the network configuration in harvest-compose.yaml.
After configuring the clusters in harvest.yml, generate harvest-compose.yml. We also want to remove the conf directory from the harvest-compose.yml file, otherwise kompose will create an empty configMap for it. We'll remove the conf directory by commenting out that line using sed.

bin/harvest generate docker --port --output harvest-compose.yml
sed -i '/\/conf/s/^/#/g' harvest-compose.yml