Class: K8s::ResourceClient

Inherits:
Object
  • Object
show all
Extended by:
Utils
Includes:
Utils
Defined in:
lib/k8s/resource_client.rb

Overview

Per-APIResource type client.

Used to get/list/update/patch/delete specific types of resources, optionally in some specific namespace.

Defined Under Namespace

Modules: Utils

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Utils

make_query, selector_query

Constructor Details

#initialize(transport, api_client, api_resource, namespace: nil, resource_class: K8s::Resource) ⇒ ResourceClient

Returns a new instance of ResourceClient.

Parameters:



67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
 
# File 'lib/k8s/resource_client.rb', line 67

def initialize(transport, api_client, api_resource, namespace: nil, resource_class: K8s::Resource)
  @transport = transport
  @api_client = api_client
  @api_resource = api_resource
  @namespace = namespace
  @resource_class = resource_class

  if @api_resource.name.include? '/'
    @resource, @subresource = @api_resource.name.split('/', 2)
  else
    @resource = @api_resource.name
    @subresource = nil
  end

  fail "Resource #{api_resource.name} is not namespaced" if namespace unless api_resource.namespaced
end

Class Method Details

.list(resources, transport, namespace: nil, labelSelector: nil, fieldSelector: nil, skip_forbidden: false) ⇒ Array<K8s::Resource>

Pipeline list requests for multiple resource types.

Returns flattened array with mixed resource kinds.

Parameters:

  • resources (Array<K8s::ResourceClient>)
  • transport (K8s::Transport)
  • namespace (String, nil) (defaults to: nil)
  • labelSelector (nil, String, Hash{String => String}) (defaults to: nil)
  • fieldSelector (nil, String, Hash{String => String}) (defaults to: nil)
  • skip_forbidden (Boolean) (defaults to: false) —

    skip resources that return HTTP 403 errors

Returns:



49
50
51
52
53
54
55
56
57
58
59
60
61
 
# File 'lib/k8s/resource_client.rb', line 49

def self.list(resources, transport, namespace: nil, labelSelector: nil, fieldSelector: nil, skip_forbidden: false)
  api_paths = resources.map{|resource| resource.path(namespace: namespace) }
  api_lists = transport.gets(*api_paths,
     response_class: K8s::API::MetaV1::List,
     query: make_query(
       'labelSelector' => selector_query(labelSelector),
       'fieldSelector' => selector_query(fieldSelector),
     ),
     skip_forbidden: skip_forbidden,
   )

  resources.zip(api_lists).map {|resource, api_list| api_list ? resource.process_list(api_list) : [] }.flatten
end

Instance Method Details

#api_version ⇒ String

Returns:

  • (String) 


85
86
87
 
# File 'lib/k8s/resource_client.rb', line 85

def api_version
  @api_client.api_version
end

#create? ⇒ Bool

Returns:

  • (Bool) 


143
144
145
 
# File 'lib/k8s/resource_client.rb', line 143

def create?
  @api_resource.verbs.include? 'create'
end

#create_resource(resource) ⇒ resource_class

Parameters:

  • resource (resource_class) —

    with metadata.namespace and metadata.name set

Returns:



149
150
151
152
153
154
155
156
 
# File 'lib/k8s/resource_client.rb', line 149

def create_resource(resource)
  @transport.request(
    method: 'POST',
    path: self.path(namespace: resource.metadata.namespace),
    request_object: resource,
    response_class: @resource_class,
  )
end

#delete(name, namespace: @namespace, propagationPolicy: nil) ⇒ K8s::API::MetaV1::Status

Parameters:

  • name (String)
  • namespace (String) (defaults to: @namespace)
  • propagationPolicy (String) (defaults to: nil) —

    The propagationPolicy to use for the API call. Possible values include “Orphan”, “Foreground”, or “Background”

Returns:



271
272
273
274
275
276
277
278
279
280
 
# File 'lib/k8s/resource_client.rb', line 271

def delete(name, namespace: @namespace, propagationPolicy: nil)
  @transport.request(
    method: 'DELETE',
    path: self.path(name, namespace: namespace),
    query: make_query(
      'propagationPolicy' => propagationPolicy
    ),
    response_class: @resource_class, # XXX: documented as returning Status
  )
end

#delete? ⇒ Bool

Returns:

  • (Bool) 


263
264
265
 
# File 'lib/k8s/resource_client.rb', line 263

def delete?
  @api_resource.verbs.include? 'delete'
end

#delete_collection(namespace: @namespace, labelSelector: nil, fieldSelector: nil, propagationPolicy: nil) ⇒ K8s::API::MetaV1::Status

Parameters:

  • namespace (String) (defaults to: @namespace)
  • labelSelector (nil, String, Hash{String => String}) (defaults to: nil)
  • fieldSelector (nil, String, Hash{String => String}) (defaults to: nil)

Returns:



286
287
288
289
290
291
292
293
294
295
296
297
298
 
# File 'lib/k8s/resource_client.rb', line 286

def delete_collection(namespace: @namespace, labelSelector: nil, fieldSelector: nil, propagationPolicy: nil)
  list = @transport.request(
    method: 'DELETE',
    path: self.path(namespace: namespace),
    query: make_query(
      'labelSelector' => selector_query(labelSelector),
      'fieldSelector' => selector_query(fieldSelector),
      'propagationPolicy' => propagationPolicy,
    ),
    response_class: K8s::API::MetaV1::List, # XXX: documented as returning Status
  )
  process_list(list)
end

#delete_resource(resource, **options) ⇒ K8s::API::MetaV1::Status

Parameters:

Returns:

See Also:



304
305
306
 
# File 'lib/k8s/resource_client.rb', line 304

def delete_resource(resource, **options)
  delete(resource.metadata.name, namespace: resource.metadata.namespace, **options)
end

#get(name, namespace: @namespace) ⇒ resource_class

Returns:



164
165
166
167
168
169
170
 
# File 'lib/k8s/resource_client.rb', line 164

def get(name, namespace: @namespace)
  @transport.request(
    method: 'GET',
    path: self.path(name, namespace: namespace),
    response_class: @resource_class,
  )
end

#get? ⇒ Bool

Returns:

  • (Bool) 


159
160
161
 
# File 'lib/k8s/resource_client.rb', line 159

def get?
  @api_resource.verbs.include? 'get'
end

#get_resource(resource) ⇒ resource_class

Parameters:

Returns:



174
175
176
177
178
179
180
 
# File 'lib/k8s/resource_client.rb', line 174

def get_resource(resource)
  @transport.request(
    method: 'GET',
    path: self.path(resource.metadata.name, namespace: resource.metadata.namespace),
    response_class: @resource_class,
  )
end

#json_patch(name, ops, namespace: @namespace) ⇒ resource_class

Parameters:

  • name (String)
  • ops (Hash) —

    json-patch operations

  • namespace (String) (defaults to: @namespace)

Returns:



252
253
254
255
256
257
258
259
260
 
# File 'lib/k8s/resource_client.rb', line 252

def json_patch(name, ops, namespace: @namespace)
  @transport.request(
    method: 'PATCH',
    path: self.path(name, namespace: namespace),
    content_type: 'application/json-patch+json',
    request_object: ops,
    response_class: @resource_class,
  )
end

#kind ⇒ String

Returns:

  • (String) 


115
116
117
 
# File 'lib/k8s/resource_client.rb', line 115

def kind
  @api_resource.kind
end

#list(labelSelector: nil, fieldSelector: nil, namespace: @namespace) ⇒ Array<resource_class>

Parameters:

  • labelSelector (nil, String, Hash{String => String}) (defaults to: nil)
  • fieldSelector (nil, String, Hash{String => String}) (defaults to: nil)

Returns:



199
200
201
202
203
204
205
206
207
208
209
210
 
# File 'lib/k8s/resource_client.rb', line 199

def list(labelSelector: nil, fieldSelector: nil, namespace: @namespace)
  list = @transport.request(
    method: 'GET',
    path: self.path(namespace: namespace),
    response_class: K8s::API::MetaV1::List,
    query: make_query(
      'labelSelector' => selector_query(labelSelector),
      'fieldSelector' => selector_query(fieldSelector),
    ),
  )
  process_list(list)
end

#list? ⇒ Bool

Returns:

  • (Bool) 


183
184
185
 
# File 'lib/k8s/resource_client.rb', line 183

def list?
  @api_resource.verbs.include? 'list'
end

#merge_patch(name, obj, namespace: @namespace, strategic_merge: true) ⇒ resource_class

Parameters:

  • name (String)
  • obj (Object) —

    supporting to_json

  • namespace (String) (defaults to: @namespace)
  • strategic_merge (Boolean) (defaults to: true) —

    use kube Strategic Merge Patch instead of standard Merge Patch (arrays of objects are merged by name)

Returns:



238
239
240
241
242
243
244
245
246
 
# File 'lib/k8s/resource_client.rb', line 238

def merge_patch(name, obj, namespace: @namespace, strategic_merge: true)
  @transport.request(
    method: 'PATCH',
    path: self.path(name, namespace: namespace),
    content_type: strategic_merge ? 'application/strategic-merge-patch+json' : 'application/merge-patch+json',
    request_object: obj,
    response_class: @resource_class,
  )
end

#name ⇒ String

Returns resource or resource/subresource.

Returns:

  • (String) —

    resource or resource/subresource



90
91
92
 
# File 'lib/k8s/resource_client.rb', line 90

def name
  @api_resource.name
end

#namespace ⇒ String?

Returns:

  • (String, nil) 


95
96
97
 
# File 'lib/k8s/resource_client.rb', line 95

def namespace
  @namespace
end

#namespaced? ⇒ Bool

Returns:

  • (Bool) 


125
126
127
 
# File 'lib/k8s/resource_client.rb', line 125

def namespaced?
  !!@api_resource.namespaced
end

#patch? ⇒ Bool

Returns:

  • (Bool) 


229
230
231
 
# File 'lib/k8s/resource_client.rb', line 229

def patch?
  @api_resource.verbs.include? 'patch'
end

#path(name = nil, subresource: @subresource, namespace: @namespace) ⇒ String

Returns:

  • (String) 


130
131
132
133
134
135
136
137
138
139
140
 
# File 'lib/k8s/resource_client.rb', line 130

def path(name = nil, subresource: @subresource, namespace: @namespace)
  namespace_part = namespace ? ['namespaces', namespace] : []

  if name && subresource
    @api_client.path(*namespace_part, @resource, name, subresource)
  elsif name
    @api_client.path(*namespace_part, @resource, name)
  else
    @api_client.path(*namespace_part, @resource)
  end
end

#process_list(list) ⇒ Array<resource_class>

Parameters:

Returns:



189
190
191
192
193
194
 
# File 'lib/k8s/resource_client.rb', line 189

def process_list(list)
  list.items.map {|item|
    # list items omit kind/apiVersion
    @resource_class.new(item.merge('apiVersion' => list.apiVersion, 'kind' => @api_resource.kind))
  }
end

#resource ⇒ String

Returns:

  • (String) 


100
101
102
 
# File 'lib/k8s/resource_client.rb', line 100

def resource
  @resource
end

#resource_class ⇒ class

Returns K8s::Resource.

Returns:

  • (class) —

    K8s::Resource



120
121
122
 
# File 'lib/k8s/resource_client.rb', line 120

def resource_class
  @resource_class
end

#subresource ⇒ String?

Returns:

  • (String, nil) 


110
111
112
 
# File 'lib/k8s/resource_client.rb', line 110

def subresource
  @subresource
end

#subresource? ⇒ Boolean

Returns:

  • (Boolean) 


105
106
107
 
# File 'lib/k8s/resource_client.rb', line 105

def subresource?
  !!@subresource
end

#update? ⇒ Bool

Returns:

  • (Bool) 


213
214
215
 
# File 'lib/k8s/resource_client.rb', line 213

def update?
  @api_resource.verbs.include? 'update'
end

#update_resource(resource) ⇒ resource_class

Parameters:

Returns:



219
220
221
222
223
224
225
226
 
# File 'lib/k8s/resource_client.rb', line 219

def update_resource(resource)
  @transport.request(
    method: 'PUT',
    path: self.path(resource.metadata.name, namespace: resource.metadata.namespace),
    request_object: resource,
    response_class: @resource_class,
  )
end