/
CRDExample.java
175 lines (154 loc) · 6.52 KB
/
CRDExample.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
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
/**
* Copyright (C) 2015 Red Hat, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.fabric8.kubernetes.examples;
import io.fabric8.kubernetes.api.model.HasMetadata;
import io.fabric8.kubernetes.api.model.ObjectMeta;
import io.fabric8.kubernetes.api.model.RootPaths;
import io.fabric8.kubernetes.api.model.apiextensions.v1beta1.CustomResourceDefinition;
import io.fabric8.kubernetes.api.model.apiextensions.v1beta1.CustomResourceDefinitionList;
import io.fabric8.kubernetes.client.CustomResource;
import io.fabric8.kubernetes.client.CustomResourceList;
import io.fabric8.kubernetes.client.DefaultKubernetesClient;
import io.fabric8.kubernetes.client.KubernetesClient;
import io.fabric8.kubernetes.client.KubernetesClientException;
import io.fabric8.kubernetes.client.Watcher;
import io.fabric8.kubernetes.client.WatcherException;
import io.fabric8.kubernetes.client.dsl.MixedOperation;
import io.fabric8.kubernetes.client.dsl.NonNamespaceOperation;
import io.fabric8.kubernetes.client.dsl.Resource;
import io.fabric8.kubernetes.client.dsl.base.CustomResourceDefinitionContext;
import io.fabric8.kubernetes.examples.crds.Dummy;
import io.fabric8.kubernetes.examples.crds.DummyList;
import io.fabric8.kubernetes.examples.crds.DummySpec;
import io.fabric8.kubernetes.internal.KubernetesDeserializer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Date;
import java.util.List;
public class CRDExample {
private static final Logger logger = LoggerFactory.getLogger(CRDExample.class);
private static boolean logRootPaths = false;
/**
* Example of Cluster and Namespaced scoped K8S Custom Resources.
* To test Cluster scoped resource use "--cluster" as first argument.
* To test Namespaced resource provide namespace as first argument (namespace must exists in K8S).
*
* @param args Either "--cluster" or namespace name.
*/
public static void main(String[] args) {
boolean resourceNamespaced = true;
String namespace = null;
if (args.length > 0) {
if ("--cluster".equals(args[0])) {
resourceNamespaced = false;
} else {
namespace = args[0];
}
}
try (final KubernetesClient client = new DefaultKubernetesClient()) {
if (resourceNamespaced) {
if (namespace == null) {
namespace = client.getNamespace();
}
if (namespace == null) {
System.err.println("No namespace specified and no default defined!");
return;
}
System.out.println("Using namespace: " + namespace);
} else {
System.out.println("Creating cluster scoped resource");
}
if (logRootPaths) {
RootPaths rootPaths = client.rootPaths();
if (rootPaths != null) {
List<String> paths = rootPaths.getPaths();
if (paths != null) {
System.out.println("Supported API Paths:");
for (String path : paths) {
System.out.println(" " + path);
}
System.out.println();
}
}
}
CustomResourceDefinitionList crds = client.customResourceDefinitions().list();
List<CustomResourceDefinition> crdsItems = crds.getItems();
System.out.println("Found " + crdsItems.size() + " CRD(s)");
CustomResourceDefinition dummyCRD = null;
final String dummyCRDName = CustomResource.getCRDName(Dummy.class);
for (CustomResourceDefinition crd : crdsItems) {
ObjectMeta metadata = crd.getMetadata();
if (metadata != null) {
String name = metadata.getName();
System.out.println(" " + name + " => " + metadata.getSelfLink());
if (dummyCRDName.equals(name)) {
dummyCRD = crd;
}
}
}
if (dummyCRD != null) {
System.out.println("Found CRD: " + dummyCRD.getMetadata().getSelfLink());
} else {
dummyCRD = CustomResourceDefinitionContext.v1beta1CRDFromCustomResourceType(Dummy.class).build();
client.apiextensions().v1beta1().customResourceDefinitions().create(dummyCRD);
System.out.println("Created CRD " + dummyCRD.getMetadata().getName());
}
KubernetesDeserializer.registerCustomKind(HasMetadata.getApiVersion(Dummy.class), dummyCRD.getKind(), Dummy.class);
// lets create a client for the CRD
NonNamespaceOperation<Dummy, DummyList, Resource<Dummy>> dummyClient = client.customResources(dummyCRD, Dummy.class, DummyList.class);
if (resourceNamespaced) {
dummyClient = ((MixedOperation<Dummy, DummyList, Resource<Dummy>>) dummyClient).inNamespace(namespace);
}
CustomResourceList<Dummy> dummyList = dummyClient.list();
List<Dummy> items = dummyList.getItems();
System.out.println(" found " + items.size() + " dummies");
for (Dummy item : items) {
System.out.println(" " + item);
}
Dummy dummy = new Dummy();
ObjectMeta metadata = new ObjectMeta();
metadata.setName("foo");
dummy.setMetadata(metadata);
DummySpec dummySpec = new DummySpec();
Date now = new Date();
dummySpec.setBar("beer: " + now);
dummySpec.setFoo("cheese: " + now);
dummy.setSpec(dummySpec);
Dummy created = dummyClient.createOrReplace(dummy);
System.out.println("Upserted " + dummy);
created.getSpec().setBar("otherBar");
dummyClient.createOrReplace(created);
System.out.println("Watching for changes to Dummies");
dummyClient.withResourceVersion(created.getMetadata().getResourceVersion()).watch(new Watcher<Dummy>() {
@Override
public void eventReceived(Action action, Dummy resource) {
System.out.println("==> " + action + " for " + resource);
if (resource.getSpec() == null) {
logger.error("No Spec for resource " + resource);
}
}
@Override
public void onClose(WatcherException cause) {
}
});
System.in.read();
} catch (KubernetesClientException e) {
logger.error(e.getMessage(), e);
} catch (Exception e) {
logger.error(e.getMessage(), e);
}
}
}