Kubernetes VIM Installation¶

This document describes the way to install Kubernetes VIM via Devstack and how to register Kubernetes VIM in Tacker.

To do that job, Tacker reuses the efforts from Kuryr-Kubernetes project in creating Kubernetes cluster and setting up native Neutron-based networking between Kubernetes and OpenStack VIMs. Features from Kuryr-Kubernetes will bring VMs and Pods (and other Kubernetes resources) on the same network.

Edit local.conf file by adding the following content

# Enable kuryr-kubernetes, docker, octavia
KUBERNETES_VIM=True
enable_plugin kuryr-kubernetes https://opendev.org/openstack/kuryr-kubernetes master
enable_plugin octavia https://opendev.org/openstack/octavia master
enable_plugin devstack-plugin-container https://opendev.org/openstack/devstack-plugin-container master
KURYR_K8S_CLUSTER_IP_RANGE="10.0.0.0/24"

The public network will be used to launched LoadBalancer for Services in Kubernetes. The example for setting public subnet is described in 1

For more details, users also see the same examples in 2 and 3.

Run stack.sh
```
$ ./stack.sh
```

Get Kubernetes VIM configuration

After successful installation, user can get “Bearer Token”:

$ TOKEN=$(kubectl describe secret $(kubectl get secrets | grep default | cut -f1 -d ' ') | grep -E '^token' | cut -f2 -d':' | tr -d '\t')

In the Hyperkube folder /yourdirectory/data/hyperkube/, user can get more information for authenticating to Kubernetes cluster.

Get ssl_ca_cert:

$ sudo cat /opt/stack/data/hyperkube/ca.crt
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Get basic authentication username and password:

$ sudo cat /opt/stack/data/hyperkube/basic_auth.csv
admin,admin,admin

The basic auth file is a csv file with a minimum of 3 columns: password, user name, user id. If there are more than 3 columns, see the following example:

password,user,uid,"group1,group2,group3"

In this example, the user belongs to group1, group2 and group3.

Get Kubernetes server url

By default Kubernetes server listens on https://127.0.0.1:6443 and https://{HOST_IP}:6443

$ curl http://localhost:8080/api/
{
  "kind": "APIVersions",
  "versions": [
    "v1"
  ],
  "serverAddressByClientCIDRs": [
    {
      "clientCIDR": "0.0.0.0/0",
      "serverAddress": "192.168.11.110:6443"
    }
  ]
}

Check Kubernetes cluster installation

By default, after set KUBERNETES_VIM=True, Devstack creates a public network called net-k8s, and two extra ones for the kubernetes services and pods under the project k8s:

$ openstack network list --project admin
+--------------------------------------+-----------------+--------------------------------------+
| ID                                   | Name            | Subnets                              |
+--------------------------------------+-----------------+--------------------------------------+
| 28361f77-1875-4070-b0dc-014e26c48aeb | public          | 28c51d19-d437-46e8-9b0e-00bc392c57d6 |
| 71c20650-6295-4462-9219-e0007120e64b | k8s-service-net | f2835c3a-f567-44f6-b006-a6f7c52f2396 |
| 97c12aef-54f3-41dc-8b80-7f07c34f2972 | k8s-pod-net     | 7759453f-6e8a-4660-b845-964eca537c44 |
| 9935fff9-f60c-4fe8-aa77-39ba7ac10417 | net0            | 92b2bd7b-3c14-4d32-8de3-9d3cc4d204cb |
| c2120b78-880f-4f28-8dc1-3d33b9f3020b | net_mgmt        | fc7b3f32-5cac-4857-83ab-d3700f4efa60 |
| ec194ffc-533e-46b3-8547-6f43d92b91a2 | net1            | 08beb9a1-cd74-4f2d-b2fa-0e5748d80c27 |
+--------------------------------------+-----------------+--------------------------------------+

To check Kubernetes cluster works well, please see some tests in kuryr-kubernetes to get more information 4.

In vim_config.yaml, project_name is fixed as “default”, that will use to support multi tenant on Kubernetes in the future.

Create vim_config.yaml file for Kubernetes VIM as the following examples:

auth_url: "https://192.168.11.110:6443"
bearer_token: "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJkZWZhdWx0Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZWNyZXQubmFtZSI6ImRlZmF1bHQtdG9rZW4tc2ZqcTQiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC5uYW1lIjoiZGVmYXVsdCIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50LnVpZCI6IjBiMzZmYTQ2LWFhOTUtMTFlNy05M2Q4LTQwOGQ1Y2Q0ZmJmMSIsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDpkZWZhdWx0OmRlZmF1bHQifQ.MBjFA18AjD6GyXmlqsdsFpJD_tgPfst2faOimfVob-gBqnAkAU0Op2IEauiBVooFgtvzm-HY2ceArftSlZQQhLDrJGgH0yMAUmYhI8pKcFGd_hxn_Ubk7lPqwR6GIuApkGVMNIlGh7LFLoF23S_yMGvO8CHPM-UbFjpbCOECFdnoHjz-MsMqyoMfGEIF9ga7ZobWcKt_0A4ge22htL2-lCizDvjSFlAj4cID2EM3pnJ1J3GXEqu-W9DUFa0LM9u8fm_AD9hBKVz1dePX1NOWglxxjW4KGJJ8dV9_WEmG2A2B-9Jy6AKW83qqicBjYUUeAKQfjgrTDl6vSJOHYyzCYQ"
ssl_ca_cert: "None"
project_name: "default"
type: "kubernetes"

Or vim_config.yaml with ssl_ca_cert enabled:

auth_url: "https://192.168.11.110:6443"
bearer_token: "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJkZWZhdWx0Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZWNyZXQubmFtZSI6ImRlZmF1bHQtdG9rZW4tc2ZqcTQiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC5uYW1lIjoiZGVmYXVsdCIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50LnVpZCI6IjBiMzZmYTQ2LWFhOTUtMTFlNy05M2Q4LTQwOGQ1Y2Q0ZmJmMSIsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDpkZWZhdWx0OmRlZmF1bHQifQ.MBjFA18AjD6GyXmlqsdsFpJD_tgPfst2faOimfVob-gBqnAkAU0Op2IEauiBVooFgtvzm-HY2ceArftSlZQQhLDrJGgH0yMAUmYhI8pKcFGd_hxn_Ubk7lPqwR6GIuApkGVMNIlGh7LFLoF23S_yMGvO8CHPM-UbFjpbCOECFdnoHjz-MsMqyoMfGEIF9ga7ZobWcKt_0A4ge22htL2-lCizDvjSFlAj4cID2EM3pnJ1J3GXEqu-W9DUFa0LM9u8fm_AD9hBKVz1dePX1NOWglxxjW4KGJJ8dV9_WEmG2A2B-9Jy6AKW83qqicBjYUUeAKQfjgrTDl6vSJOHYyzCYQ"
ssl_ca_cert: "-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----"
project_name: "default"
type: "kubernetes"

You can also specify username and password for Kubernetes VIM configuration:

auth_url: "https://192.168.11.110:6443"
username: "admin"
password: "admin"
ssl_ca_cert: "-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----"
project_name: "default"
type: "kubernetes"

User can change the authentication like username, password, etc. Please see Kubernetes document 5 to read more information about Kubernetes authentication.

Run Tacker command for register vim:

$ openstack vim register --config-file vim_config.yaml vim-kubernetes

$ openstack vim list
+--------------------------------------+----------------------------------+----------------+------------+------------+------------------------------------------------------------+-----------+
| id                                   | tenant_id                        | name           | type       | is_default | placement_attr                                             | status    |
+--------------------------------------+----------------------------------+----------------+------------+------------+------------------------------------------------------------+-----------+
| 45456bde-6179-409c-86a1-d8cd93bd0c6d | a6f9b4bc9a4d439faa91518416ec0999 | vim-kubernetes | kubernetes | False      | {u'regions': [u'default', u'kube-public', u'kube-system']} | REACHABLE |
+--------------------------------------+----------------------------------+----------------+------------+------------+------------------------------------------------------------+-----------+

In placement_attr, there are three regions: ‘default’, ‘kube-public’, ‘kube-system’, that map to namespace in Kubernetes environment.

Other related commands to Kubernetes VIM:

$ cat kubernetes-VIM-update.yaml
username: "admin"
password: "admin"
project_name: "default"
ssl_ca_cert: "None"
type: "kubernetes"


$ tacker vim-update vim-kubernetes --config-file kubernetes-VIM-update.yaml
$ tacker vim-show vim-kubernetes
$ tacker vim-delete vim-kubernetes

When update Kubernetes VIM, user can update VIM information (such as username, password, bearer_token and ssl_ca_cert) except auth_url and type of VIM.

References¶

1: https://github.com/openstack-dev/devstack/blob/master/doc/source/networking.rst#shared-guest-interface
2: https://opendev.org/openstack/tacker/src/branch/master/doc/source/install/devstack.rst
3: https://opendev.org/openstack/tacker/src/branch/master/devstack/local.conf.kubernetes
4: https://github.com/openstack/kuryr-kubernetes/blob/master/doc/source/installation/testing_connectivity.rst
5: https://kubernetes.io/docs/admin/authentication

Kubernetes VIM Installation

Kubernetes VIM Installation¶

References¶

tacker 5.0.1.dev1

Page Contents