Class: Biosphere::Kube::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/biosphere/kube.rb

Instance Method Summary collapse

Constructor Details

#initialize(hostname, ssl_options) ⇒ Client

Returns a new instance of Client.



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# File 'lib/biosphere/kube.rb', line 30

def initialize(hostname, ssl_options)
    @clients = []

    @clients << ::Kubeclient::Client.new("#{hostname}/api" , "v1", ssl_options: ssl_options)
    @clients << ::Kubeclient::Client.new("#{hostname}/apis/extensions/" , "v1beta1", ssl_options: ssl_options)
    @clients << ::Kubeclient::Client.new("#{hostname}/apis/batch/" , "v2alpha1", ssl_options: ssl_options)

    @clients.each { |c| c.discover }
end

Instance Method Details

#apply_resource(resource) ⇒ Object 



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# File 'lib/biosphere/kube.rb', line 119

def apply_resource(resource)
    name = resource[:metadata][:name]
    responses = []
    not_found = false
    begin
        response = get(resource)
    rescue RestClient::NotFound => e
        not_found = true
    end

    if not_found
        begin
            response = post(resource)
            puts "Created resource #{response[:resource]}"
            responses << response
        rescue RestClient::UnprocessableEntity => e
            pp e
            pp JSON.parse(e.response.body)
        end
    else
        puts "Updating resource #{response[:resource]}"

        # Get the current full resource from apiserver
        current_resource = response[:body]

        update_resource = Kube.kube_merge_resource_for_put!(current_resource, resource)

        begin
            responses << put(update_resource)
        rescue RestClient::Exception => e
            puts "Error updating resource: #{e} #{e.class}"
            pp JSON.parse(e.response)
        rescue RestClient::Exception => e
            puts "Misc exception: #{e}, #{e.class}, #{e.response}"
        end
        
        return responses
    end
end

#get(resource) ⇒ Object 



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# File 'lib/biosphere/kube.rb', line 80

def get(resource)
    name = resource[:metadata][:name]
    client = get_client(resource)
    resource_name = get_resource_name(resource)

    if !client
        raise ArgumentError, "Unknown resource #{resource[:kind]} of #{name} for kubernetes. Maybe this is in a new extension api?"
    end

    ns_prefix = client.build_namespace_prefix(resource[:metadata][:namespace])
    key = ns_prefix + resource_name + "/#{name}"
    ret = client.rest_client[key].get(client.instance_variable_get("@headers"))
    return {
        action: :get,
        resource: key,
        body: JSON.parse(ret.body, :symbolize_names => true)
    }
end

#get_client(resource) ⇒ Object 



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# File 'lib/biosphere/kube.rb', line 51

def get_client(resource)
    kind = resource[:kind].underscore_case
    @clients.each do |c|
        if c.instance_variable_get("@entities")[kind]
            return c
        end
    end
    return nil
end

#get_resource_name(resource) ⇒ Object 



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# File 'lib/biosphere/kube.rb', line 40

def get_resource_name(resource)
    resource_name = nil
    kind = resource[:kind].underscore_case
    @clients.each do |c|
        if c.instance_variable_get("@entities")[kind]
            return c.instance_variable_get("@entities")[kind].resource_name
        end
    end
    return nil
end

#post(resource) ⇒ Object 



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# File 'lib/biosphere/kube.rb', line 61

def post(resource)
    name = resource[:metadata][:name]
    client = get_client(resource)
    resource_name = get_resource_name(resource)

    if !client
        raise ArgumentError, "Unknown resource #{resource[:kind]} of #{name} for kubernetes. Maybe this is in a new extension api?"
    end

    ns_prefix = client.build_namespace_prefix(resource[:metadata][:namespace])
    ns_prefix = ns_prefix.empty? ? "namespaces/default/" : ns_prefix
    ret =  client.rest_client[ns_prefix + resource_name].post(resource.to_h.to_json, { 'Content-Type' => 'application/json' }.merge(client.instance_variable_get("@headers")))
    return {
        action: :post,
        resource: ns_prefix + resource_name + "/#{name}",
        body: JSON.parse(ret.body, :symbolize_names => true)
    }
end

#put(resource) ⇒ Object 



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# File 'lib/biosphere/kube.rb', line 99

def put(resource)
    name = resource[:metadata][:name]
    client = get_client(resource)
    resource_name = get_resource_name(resource)

    if !client
        raise ArgumentError, "Unknown resource #{resource[:kind]} of #{name} for kubernetes. Maybe this is in a new extension api?"
    end

    ns_prefix = client.build_namespace_prefix(resource[:metadata][:namespace])
    key = ns_prefix + resource_name + "/#{name}"
    ret = client.rest_client[key].put(resource.to_h.to_json, { 'Content-Type' => 'application/json' }.merge(client.instance_variable_get("@headers")))
    return {
        action: :put,
        resource: key,
        body: JSON.parse(ret.body, :symbolize_names => true)
    }

end