Added kubernetes token support

[shal]

Added parameters to concourse kite-resource for generating kubeconfig

[codecov-io]

Codecov Report

Merging #101 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #101   +/-   ##
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  Coverage   35.07%   35.07%           
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  Files          18       18           
  Lines         499      499           
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  Hits          175      175           
  Misses        324      324

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[calj]

Looks good to me!
Can you add some documentation for new parameters?

[shal]

Kite concourse resource

When you define kite resource you should defind kubeconfig or kite can generate it from defined token, endpoint, user, cluster, certificate-authority parameters.

Here is description of parameters, that kite needs to generate kubeconfig:

• token - service account token for your cluster
• endpoint - cluster server adress
• cluster - name of cluster
• user - username
• certificate-autority - service account certificate for cluster

Where to get this parameters ?

Get secret's name

kubectl get serviceAccount <service_account_name> -oyaml

Then look on secret's yaml. Here you can find certificate-authority and token values:

kubectl get secrets <secrets_name> -oyaml

Get cluste's name:

kubectl config current-context

Find server address:

kubectl config view

Example

resource_types:
  - name: kite
    type: docker-image
    source:
      repository: heliostech/kite

resources:
  - name: kite-test
    type: kite
    source:
      json_key: {{gcp_service_account_key}}
      token: {{sa_token}}
      endpoint: {{server_ip}}
      cluster: {{cluster_name}}
      name: {{username}}
      certificate-autority: {{certificate-autority}}

[shal]

@calj @mod Actually, we have some kind of error with kite concourse resource:
json: cannot unmarshal object into Go value of type []atc.Version
So I can't test this patch, I need to find the problem.