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.



30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
 
# 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/apps/" , "v1beta1", 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 << ::Kubeclient::Client.new("#{hostname}/apis/storage.k8s.io/" , "v1", ssl_options: ssl_options)
    @clients << ::Kubeclient::Client.new("#{hostname}/apis/autoscaling/" , "v1", ssl_options: ssl_options)

    @clients.each do |c|
        begin
            c.discover
        rescue KubeException => e
            puts "Could not discover api #{c.api_endpoint} - maybe this kube version is too old."
        end
    end
end

Instance Method Details

#apply_resource(resource) ⇒ Object 



147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
 
# File 'lib/biosphere/kube.rb', line 147

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::NotFound => e
            pp e
            pp JSON.parse(e.response.body)
            puts "404 when applying resources might mean one of the following:"
            puts "\t * You're trying to apply a non-namespaced manifest."
            puts "\t   Confirm if your manifests metadata should contain a namespace field or not"
        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 



108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
 
# File 'lib/biosphere/kube.rb', line 108

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 



60
61
62
63
64
65
66
67
68
 
# File 'lib/biosphere/kube.rb', line 60

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

#get_resource_name(resource) ⇒ Object 



49
50
51
52
53
54
55
56
57
58
 
# File 'lib/biosphere/kube.rb', line 49

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 



70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
 
# File 'lib/biosphere/kube.rb', line 70

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])
    begin
        ret =  client.rest_client[ns_prefix + resource_name].post(resource.to_h.to_json, { 'Content-Type' => 'application/json' }.merge(client.instance_variable_get("@headers")))
    rescue RestClient::MethodNotAllowed => e
        if !resource[:metadata][:namespace]
            puts "Error doing api call: #{e}".colorize(:red)
            puts "This might be because you did not specify namespace in your resource: #{resource[:metadata]}".colorize(:yellow)
        else 
            puts "Error calling API (on RestClient::MethodNotAllowed): #{e}"
        end
        puts "rest_client: #{ns_prefix + resource_name}, client: #{client.rest_client[ns_prefix + resource_name]}"
        puts "Dumpin resource request:"
        pp resource.to_h.to_json
        raise e

    rescue RestClient::Exception => e
        puts "Error calling API (on RestClient::Exception rescue): #{e}"
        puts "rest_client: #{ns_prefix + resource_name}, client: #{client.rest_client[ns_prefix + resource_name]}"
        puts "Dumpin resource request:"
        pp resource.to_h.to_json
        raise e
    end
    return {
        action: :post,
        resource: ns_prefix + resource_name + "/#{name}",
        body: JSON.parse(ret.body, :symbolize_names => true)
    }
end

#put(resource) ⇒ Object 



127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
 
# File 'lib/biosphere/kube.rb', line 127

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