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Steps described in this page are run by "ubuntu", a non-root user.


This page describes the steps of using rancher (rancher environment) to deploy Kubernetes node and config Kubernetes cluster nodes.



Deploy The First Kubernetes Node

This section, similar as Quickstart Installation in ONAP on Kubernetes, provides the instruction of deploying Kubernetes node through Rancher.

The first Kubernetes node in the Kubernetes cluster is to be deployed on the rancher server VM which also is configured with ranch client running.

Setup Rancher Server

Follow the steps below to install and configure Rancher:

#PurposeCommand and Example
1

Add host name to /etc/hosts file

Adding all cluster nodes to /etc/hosts file on each node


sudo vi /etc/hosts

 Example result of /etc/hosts file

$ more /etc/hosts

127.0.0.1 sdnc-k8s localhost

...

10.147.132.10 sdnc-k8s

10.147.90.6 sdnc-k8s-2

2

Install/Start Rancher server


There may be issues with the DNS pod in Rancher after a reboot or when running clustered hosts as described in ONAP bug:

A clean system is OK.

Use port 8880 instead of 8080.

docker run -d --restart=unless-stopped -p 8880:8080 rancher/server:v1.6.10

 Example of rancher start in docker

$ docker run -d --restart=unless-stopped -p 8880:8080 rancher/server:v1.6.10

Unable to find image 'rancher/server:latest' locally

latest: Pulling from rancher/server

6599cadaf950: Pull complete

23eda618d451: Pull complete

f0be3084efe9: Pull complete

52de432f084b: Pull complete

a3ed95caeb02: Pull complete

e75cd91a1dc5: Pull complete

997f1b48f59f: Pull complete

313c28fb4e37: Pull complete

2a0730d1275c: Pull complete

8848fbebd2c8: Pull complete

906504ea9ea6: Pull complete

9329940f8e65: Pull complete

e849debd7945: Pull complete

4883bd135dd2: Pull complete

605c6a0fe940: Pull complete

274bc004c933: Pull complete

a6cb25e8d1a2: Pull complete

3ded9d4c8c2b: Pull complete

a571d2f40012: Pull complete

Digest: sha256:096026aa3eed411077690c904cd5dd3cce66eb39312c78a84209eab23387c36d

Status: Downloaded newer image for rancher/server:latest

4b3020cfccc2db47905e89e66cd8533fea82d60b886b2f4509e5f1c56764563a

 Example of validate rancher server is up in docker

$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
e3f1c2ce3234 rancher/server:v1.6.10 "/usr/bin/entry /usr/" 7 seconds ago Up 6 seconds 3306/tcp, 0.0.0.0:8880->8080/tcp pensive_goldberg
$


Configure Rancher Client

You can access the Rancher UI through http:<master host IP>:8880 ; it takes you to the apps/stacks page.

For example,

You can access Rancher from http://10.147.132.10:8880/; the page will be opened to http://10.147.132.10:8880/env/1a5/apps/stacks.


From here, follow the steps below to configure the Rancher:

#PurposeScript shots illustrated steps
1

Create Rancher environment:

  • Launch "Manage Enviroments" page
  • Click on "Add Enviroment"
  • Fill in the template with the following, and then click on the Create button
    • Name: "sdnc-ha"
    • (Optional) Add Description of the new environment
    • Environment Template: Kubernetes
  •  
  • Check that the new enviroment has been created and displays as "Active" 
  •  Delete pre-existing Default environment


2

Add host to INFRASTRUCTURE

  • Go to the Hosts page via INFRASTRUCTURE -> Hosts
  • Click on the AddHost button

  • For the first time only, the following confirmation page will appear (click the Save button to continue):

  • The following Add Host page will appear:

    • Skip steps 1, 2, and 3 listed in the page
    • In step 4, fill in the blank with the server IP
    • In step 5:

      • Click the Copy to Clipboard button to copy the command and run it on the server

         Example of registering rancher agent on the server

        $ docker run -e CATTLE_AGENT_IP="10.147.132.10"  --rm --privileged -v /var/run/docker.sock:/var/run/docker.sock -v /var/lib/rancher:/var/lib/rancher rancher/agent:v1.2.6http://10.147.132.10:8880/v1/scripts/774E9A523D82DBCBDE13:1483142400000:FPPmrMz8IurKQwVLV2UpfGR10AY

        Unable to find image 'rancher/agent:v1.2.6' locally

        v1.2.6: Pulling from rancher/agent

        b3e1c725a85f: Pull complete

        6a710864a9fc: Pull complete

        d0ac3b234321: Pull complete

        87f567b5cf58: Pull complete

        063e24b217c4: Pull complete

        d0a3f58caef0: Pull complete

        16914729cfd3: Pull complete

        2ce3828c0b9d: Pull complete

        7df47a98fc4b: Pull complete

        Digest: sha256:a68afd351c7417e6d66a77e97144113ceb7a9c3cdd46fb6e1fd5f5a5a33111cd

        Status: Downloaded newer image for rancher/agent:v1.2.6

         

        INFO: Running Agent Registration Process, CATTLE_URL=http://10.147.132.10:8880/v1

        INFO: Attempting to connect to: http://10.147.132.10:8880/v1

        INFO: http://10.147.132.10:8880/v1 is accessible

        INFO: Inspecting host capabilities

        INFO: Boot2Docker: false

        INFO: Host writable: true

        INFO: Token: xxxxxxxx

        INFO: Running registration

        INFO: Printing Environment

        INFO: ENV: CATTLE_ACCESS_KEY=0CB90B4247A136F6E43E

        INFO: ENV: CATTLE_AGENT_IP=10.147.132.10

        INFO: ENV: CATTLE_HOME=/var/lib/cattle

        INFO: ENV: CATTLE_REGISTRATION_ACCESS_KEY=registrationToken

        INFO: ENV: CATTLE_REGISTRATION_SECRET_KEY=xxxxxxx

        INFO: ENV: CATTLE_SECRET_KEY=xxxxxxx

        INFO: ENV: CATTLE_URL=http://10.147.132.10:8880/v1

        INFO: ENV: DETECTED_CATTLE_AGENT_IP=172.17.0.1

        INFO: ENV: RANCHER_AGENT_IMAGE=rancher/agent:v1.2.6

        INFO: Launched Rancher Agent: 4e3b1e4c2b4c33095ef550cbece626277b63783b012efe74ed2713df63cc925c

         Example of validating rancher agent started

        $ docker ps
        CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
        64562118a30c rancher/etcd:v2.3.7-13 "/.r/r /opt/rancher/r" 1 seconds ago Up Less than a second r-kubernetes-etcd-1-b95cd471
        308b3fbf1882 rancher/net:holder "/.r/r /rancher-entry" 12 seconds ago Up 11 seconds r-ipsec-ipsec-1-9198fa8b
        523278d910f4 rancher/dns:v0.15.3 "/rancher-entrypoint." 12 seconds ago Up 11 seconds r-network-services-metadata-dns-1-2730cb6f
        8520cc50c5ff rancher/metadata:v0.9.4 "/rancher-entrypoint." 13 seconds ago Up 12 seconds r-network-services-metadata-1-53bf4aaf
        1f6dcb021f5b rancher/healthcheck:v0.3.3 "/.r/r /rancher-entry" 14 seconds ago Up 13 seconds r-healthcheck-healthcheck-1-3d14df58
        1d7ad141ceec rancher/network-manager:v0.7.8 "/rancher-entrypoint." 14 seconds ago Up 13 seconds r-network-services-network-manager-1-fdd38b68
        c7dfdde262d7 rancher/net:v0.11.9 "/rancher-entrypoint." 14 seconds ago Up 13 seconds r-ipsec-cni-driver-1-415b67fe
        64e2f05b0394 rancher/agent:v1.2.6 "/run.sh run" 20 seconds ago Up 19 seconds rancher-agent
        e3f1c2ce3234 rancher/server:v1.6.10 "/usr/bin/entry /usr/" 9 minutes ago Up 9 minutes 3306/tcp, 0.0.0.0:8880->8080/tcp pensive_goldberg
        $

    • Click on the Close button to close the Add Host page
  • Go to the Hosts page from INFRASTRUCTURE -> Hosts

    • You should see the newly added host:

       Example of Hosts page with one node



3

Confirm that the host process has completed

The end of adding the host operation is indicated by the CLI option shown under the KUBERNETES dropdown menu:

 Example of CLI option in KUBERNETES drop down


Configure Kubernetes Cluster Nodes

Repeat the following steps as many times as the number of nodes you are going to have in the Kubernetes cluster.

#PurposeCommand and Example
1

Add host name to /etc/hosts file

Adding all cluster nodes to /etc/hosts file on each node


sudo vi /etc/hosts

 Example result of /etc/hosts file

$ more /etc/hosts

127.0.0.1 sdnc-k8s-2 localhost

...

10.147.132.10 sdnc-k8s

10.147.90.6 sdnc-k8s-2

2

Add host to INFRASTRUCTURE

See examples from step 2 of section "Configure Rancher Client"

  • Go to the Hosts page via INFRASTRUCTURE -> Hosts
  • Click on the AddHost button
  • In Add Host page:
    • Skip steps 1, 2, and 3 listed in the page
    • In step 4, fill in the blank with the server IP
    • In step 5:

      • Click the Copy to Clipboard button to copy the command and run it on the server

    • Click on the Close button to close the Add Host page
  • Go to the Hosts page from INFRASTRUCTURE -> Hosts

    • You should see the newly added host:


3

Confirm that the Setup has Finished

Wait until all hosts in Rancher show green, indicating that setup is complete!
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