This document provides instructions on how to deploy resources on VolF5® Distributed Cloud Services network cloud or edge cloud using Distributed Cloud vK8s. Distributed Cloud provides a mechanism to easily deploy applications across the Distributed Cloud global network and make them available closer to users in major metro markets. To know more about how the Distributed Cloud Platform distributes application deployment, see Distributed Application Management.
The vK8s resources covered in this guide are:
- Config map
- Daemon sets
- Cron Jobs
- Service Accounts
To deploy vK8s resources, first create a vK8s object as per the instructions in the Create Virtual K8s Object document.
Using the instructions provided in this guide, you can deploy resources with the kubeconfig of the vK8s object.
Note: If you do not have an account, see Create an Account.
An application and associated Kubernetes deployment file.
Kubeconfig file of the vK8s object. See the Create Virtual K8s Object document for more details.
You can deploy vK8s resource in one of the following two ways:
- Using the resource manifest directly in the F5 Distributed Cloud Console.
- Using the resource manifest and kubeconfig file of vK8s cluster from CLI with Kubectl.
Perform the following steps:
Step 1: Navigate to your vK8s object and download its kubeconfig.
- Select the
- Select the desired namespace from the
- Navigate to
Kubeconfigfor the created vK8s object to download its kubeconfig file.
- Set environment variable for the downloaded kubeconfig in your local machine.
Note: In case of deployment using kubectl, setting KUBECONFIG variable deploys the resources to the vK8s.
Step 2: Prepare the manifest file for the resource.
Create a file in your local machine and enter the manifest content in JSON or YAML format. The following is the list of sample manifests:
- vK8s service manifest sample:
apiVersion: v1 kind: Service metadata: name: emailservice labels: app: emailservice annotations: ves.io/proxy-type: HTTP_PROXY ves.io/http2-enable: "true" spec: type: ClusterIP selector: app: emailservice ports: - name: grpc port: 5000 targetPort: 8080
- vK8s job manifest sample:
apiVersion: batch/v1 kind: Job metadata: name: pi spec: template: spec: containers: - name: pi image: perl command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"] restartPolicy: Never backoffLimit: 4
- vK8s config map manifest sample:
apiVersion: v1 data: mysqld.conf: "[mysqld]\npid-file\t = /var/run/mysqld/mysqld.pid\nsocket\t\t \ = /var/run/mysqld/mysqld.sock\n# Where the database files are stored inside the container\ndatadir\t\t = /var/lib/mysql\n\n# My application special configuration\nmax_allowed_packet = 32M\nsql-mode = 'STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION'\n\n# Accept connections from any IP address\nbind-address\t = 0.0.0.0\n" kind: ConfigMap metadata: creationTimestamp: null name: mysql-conf
- vK8s secret - Generate the secret using the following command:
kubectl create secret docker-registry dock-secret --docker-server=docker.io --docker-username="<registry username>" --docker-password="<registry password>" --docker-email=<registry email>
Note: In case of generating the secret using above command, the secret is directly created on vK8s and there is no need of performing any action on Console.
- Daemon set manifest sample:
apiVersion: apps/v1 kind: DaemonSet metadata: name: fluentd-elasticsearch namespace: kube-system labels: k8s-app: fluentd-logging spec: selector: matchLabels: name: fluentd-elasticsearch template: metadata: labels: name: fluentd-elasticsearch spec: tolerations: # this toleration is to have the daemonset runnable on master nodes # remove it if your masters can't run pods - key: node-role.kubernetes.io/master effect: NoSchedule containers: - name: fluentd-elasticsearch image: quay.io/fluentd_elasticsearch/fluentd:v2.5.2 resources: limits: memory: 200Mi requests: cpu: 100m memory: 200Mi volumeMounts: - name: varlog mountPath: /var/log - name: varlibdockercontainers mountPath: /var/lib/docker/containers readOnly: true terminationGracePeriodSeconds: 30 volumes: - name: varlog hostPath: path: /var/log - name: varlibdockercontainers hostPath: path: /var/lib/docker/containers
- Cron job manifest sample:
apiVersion: batch/v1beta1 kind: CronJob metadata: name: hello spec: schedule: "*/1 * * * *" jobTemplate: spec: template: spec: containers: - name: hello image: busybox imagePullPolicy: IfNotPresent args: - /bin/sh - -c - date; echo Hello from the Kubernetes cluster restartPolicy: OnFailure
ConcurrencyPolicyis always set to
Forbidirrespective of what is specified in the manifest for any CronJob launched on the Regional Edge Sites.
- Service account manifest sample - Here the YAML for role, service account, and role-binding are shown.
apiVersion: rbac.authorization.k8s.io/v1 kind: Role metadata: namespace: default name: pod-read-role rules: - apiGroups: [""] # "" indicates the core API group resources: ["pods"] verbs: ["get", "watch", "list"] --- apiVersion: v1 kind: ServiceAccount metadata: name: pod-read-sa --- kind: RoleBinding apiVersion: rbac.authorization.k8s.io/v1 metadata: name: pod-read-rolebinding namespace: default subjects: - kind: ServiceAccount name: pod-read-sa apiGroup: "" roleRef: kind: Role name: pod-read-role apiGroup: ""
Step 3: Deploy the resource.
Step 3.1: Deploy from Console.
- With your desired namespace selected, select
- Click on your vK8s object to open its dashboard.
Add Serviceand enter the service manifest prepared in Step 2. Click
Add Joband enter the job manifest prepared in Step 2. Click
Add ConfigMapand enter the config map manifest prepared in Step 2. Click
Add Secretand enter the secret manifest prepared in Step 2. Click
Note: You can directly create secret on vK8s using kubectl as shown in Step 2.
Step 3.2: Deploy using Kubectl.
To deploy the web application in a K8s cluster, the following are required:
- Kubeconfig of the K8s cluster. For this, use the vK8s kubeconfig downloaded in previous step.
- Manifest file of your web application. See Step 1.2 for sample manifests.
Enter the following command to deploy the resource. This sample deploys a vK8s service.
kubectl apply -f k8s-service-manifest.yaml --kubeconfig vk8s-kubecfg.yaml
Note: Pods created on a site via Deployment, StatefulSet, Job, and, CronJob in vK8s are configured with the site labels as environment variables. If the labels are changed on a site, the pods are restarted with the changed labels set as environment variables.