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Working in progress

Although the exciting instructions on this page are working for kubernetes, the cluster configuration part is still working in progress. Will be updated as soon as it becomes available.


Quickstart Installation in ONAP on Kubernetes provides instruction of setting kubernestes through Rancher. The steps described on this page include using rancher to configure clustered kubernetes nodes - keep this page, the parent and the linked pages all in sync



Install Rancher

Follow the steps below to install and configure Rancher:

#PurposeCommand and Example
1

Add host name to /etc/hosts file 1

sudo vi /etc/hosts

ubuntu@sdnc-k8s:~$ more /etc/hosts

127.0.0.1 sdnc-k8s localhost

...

10.147.132.10 sdnc-k8s

10.147.90.6 sdnc-k8s-2

2 

Clone the OOM project from ONAP gerrit

git clone http://gerrit.onap.org/r/oom

3 

Install Docker 1.12 2


curl https://releases.rancher.com/install-docker/1.12.sh | sh

+ sudo -E sh -c docker version

Client:

 Version:      1.12.6

 API version:  1.24

 Go version:   go1.6.4

 Git commit:   78d1802

 Built:        Tue Jan 10 20:38:45 2017

 OS/Arch:      linux/amd64


Server:

 Version:      1.12.6

 API version:  1.24

 Go version:   go1.6.4

 Git commit:   78d1802

 Built:        Tue Jan 10 20:38:45 2017

 OS/Arch:      linux/amd64


If you would like to use Docker as a non-root user, you should now consider

adding your user to the "docker" group with something like:


  sudo usermod -aG docker ubuntu


Remember that you will have to log out and back in for this to take effect!

4

Install/Start Rancher server 3

Only on master node (if you are installing more than one Kubernetes nodes), Use port 8880 instead of 8080.

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

ubuntu@sdnc-k8s:~$ docker ps

CONTAINER ID    IMAGE               COMMAND                  CREATED             STATUS              PORTS                               NAMES

4b3020cfccc2        rancher/server      "/usr/bin/entry /usr/"   12 minutes ago      Up 12 minutes       3306/tcp, 0.0.0.0:8880->8080/tcp   backstabbing_wright

Notes:

  1. Adding all cluster nodes to /etc/hosts file on each node is optional
  2. Check out compartible versions among Rancher, Kubernetes and Docker
  3. There may be issues with the DNS pod in Rancher after a reboot or when running clustered hosts as described in ONAP bug OOM-236 (Rancher DNS pod non-functional after system reboot - only in cluster mode). A clean system is OK.


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

 

  • Name: "sdnc-ha"
  • (Optional) Add Description of the new environment
  • Environment Template: Kubernetes
  • Click on the Create button

 

  • Check that the new enviroment has been created and displays as "Active"

 

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
    • 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

        ubuntu@sdnc-k8s:~$ 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

        ubuntu@sdnc-k8s:~$ docker ps

        CONTAINER ID        IMAGE                   COMMAND                  CREATED             STATUS              PORTS                               NAMES

        43eff054da6a        rancher/net:v0.11.9    "/rancher-entrypoint."   5 seconds ago       Up 4 seconds                                            r-ipsec-cni-driver-1-4a5c6e16

        4e3b1e4c2b4c        rancher/agent:v1.2.6   "/run.sh run"            27 seconds ago      Up 27 seconds                                           rancher-agent

        4b3020cfccc2         rancher/server          "/usr/bin/entry /usr/"   46 minutes ago      Up 46 minutes       3306/tcp, 0.0.0.0:8880->8080/tcp   backstabbing_wright

    • 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 host process has completed

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


Install kubectl

kubectl is a command line interface for running commands against Kubernetes clusters.

Follow the steps below to install kubectrl:

#PurposeCommand and Example
1

Download kubectl on the server

curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

                                 Dload  Upload   Total   Spent    Left  Speed

100 49.8M  100 49.8M    0     0  15.3M      0  0:00:03  0:00:03 --:--:-- 15.3M

2

Enable the kubectl command

chmod +x ./kubectl

sudo mv ./kubectl /usr/local/bin/kubectl

3

Generate Config from the Rancher UI

  • From the Rancher UI, go to a Kubernetes CLI page through KUBERNETES -> CLI
  • Click on the Generate Config button to generate the config

  • The following content will be brought up; click on the Copy to Clipboard button to copy the generated config and use it in next step:


4

Create the kube config on the server

mkdir ~/.kube

vi ~/.kube/config

Paste the generated config from rancher UI (from last step) to this file, then save the file.

5

Validate the kube config

kubectl cluster-info


Configure Kubernetes Cluster

coming soon (smile)


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