/
kubernetes.go
219 lines (190 loc) · 8.42 KB
/
kubernetes.go
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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
package kube
import (
"bytes"
"context"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
v1 "k8s.io/api/core/v1"
networkingv1 "k8s.io/api/networking/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/scheme"
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/tools/remotecommand"
)
type Kubernetes struct {
ClientSet *kubernetes.Clientset
RestConfig *rest.Config
}
func NewKubernetesForContext(context string) (*Kubernetes, error) {
logrus.Debugf("instantiating k8s Clientset for context %s", context)
kubeConfig, err := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
clientcmd.NewDefaultClientConfigLoadingRules(),
&clientcmd.ConfigOverrides{CurrentContext: context}).ClientConfig()
if err != nil {
return nil, errors.Wrapf(err, "unable to build config")
}
clientset, err := kubernetes.NewForConfig(kubeConfig)
if err != nil {
return nil, errors.Wrapf(err, "unable to instantiate Clientset")
}
return &Kubernetes{
ClientSet: clientset,
RestConfig: kubeConfig,
}, nil
}
func (k *Kubernetes) GetNamespace(namespace string) (*v1.Namespace, error) {
ns, err := k.ClientSet.CoreV1().Namespaces().Get(context.TODO(), namespace, metav1.GetOptions{})
return ns, errors.Wrapf(err, "unable to get namespace %s", namespace)
}
func (k *Kubernetes) GetAllNamespaces() (*v1.NamespaceList, error) {
nsList, err := k.ClientSet.CoreV1().Namespaces().List(context.TODO(), metav1.ListOptions{})
return nsList, errors.Wrapf(err, "unable to list namespaces")
}
func (k *Kubernetes) SetNamespaceLabels(namespace string, labels map[string]string) (*v1.Namespace, error) {
ns, err := k.GetNamespace(namespace)
if err != nil {
return nil, err
}
ns.Labels = labels
_, err = k.ClientSet.CoreV1().Namespaces().Update(context.TODO(), ns, metav1.UpdateOptions{})
return ns, errors.Wrapf(err, "unable to update namespace %s", namespace)
}
func (k *Kubernetes) DeleteNamespace(ns string) error {
err := k.ClientSet.CoreV1().Namespaces().Delete(context.TODO(), ns, metav1.DeleteOptions{})
return errors.Wrapf(err, "unable to delete namespace %s", ns)
}
func (k *Kubernetes) CreateNamespace(ns *v1.Namespace) (*v1.Namespace, error) {
nsr, err := k.ClientSet.CoreV1().Namespaces().Create(context.TODO(), ns, metav1.CreateOptions{})
return nsr, errors.Wrapf(err, "unable to create namespace %s", ns.Name)
}
func (k *Kubernetes) DeleteAllNetworkPoliciesInNamespace(ns string) error {
logrus.Debugf("deleting all network policies in namespace %s", ns)
netpols, err := k.ClientSet.NetworkingV1().NetworkPolicies(ns).List(context.TODO(), metav1.ListOptions{})
if err != nil {
return errors.Wrapf(err, "unable to list network policies in ns %s", ns)
}
for _, np := range netpols.Items {
logrus.Debugf("deleting network policy %s/%s", ns, np.Name)
err = k.DeleteNetworkPolicy(np.Namespace, np.Name)
if err != nil {
return err
}
}
return nil
}
func (k *Kubernetes) DeleteNetworkPolicy(ns string, name string) error {
err := k.ClientSet.NetworkingV1().NetworkPolicies(ns).Delete(context.TODO(), name, metav1.DeleteOptions{})
return errors.Wrapf(err, "unable to delete network policy %s/%s", ns, name)
}
func (k *Kubernetes) GetNetworkPoliciesInNamespace(namespace string) ([]networkingv1.NetworkPolicy, error) {
netpolList, err := k.ClientSet.NetworkingV1().NetworkPolicies(namespace).List(context.TODO(), metav1.ListOptions{})
if err != nil {
return nil, errors.Wrapf(err, "unable to get netpols in namespace %s", namespace)
}
return netpolList.Items, nil
}
func (k *Kubernetes) UpdateNetworkPolicy(policy *networkingv1.NetworkPolicy) (*networkingv1.NetworkPolicy, error) {
logrus.Debugf("updating network policy %s/%s", policy.Namespace, policy.Name)
np, err := k.ClientSet.NetworkingV1().NetworkPolicies(policy.Namespace).Update(context.TODO(), policy, metav1.UpdateOptions{})
return np, errors.Wrapf(err, "unable to update network policy %s/%s", policy.Namespace, policy.Name)
}
func (k *Kubernetes) CreateNetworkPolicy(policy *networkingv1.NetworkPolicy) (*networkingv1.NetworkPolicy, error) {
logrus.Debugf("creating network policy %s/%s", policy.Namespace, policy.Name)
createdPolicy, err := k.ClientSet.NetworkingV1().NetworkPolicies(policy.Namespace).Create(context.TODO(), policy, metav1.CreateOptions{})
return createdPolicy, errors.Wrapf(err, "unable to create network policy %s/%s", policy.Namespace, policy.Name)
}
func (k *Kubernetes) GetService(namespace string, name string) (*v1.Service, error) {
service, err := k.ClientSet.CoreV1().Services(namespace).Get(context.TODO(), name, metav1.GetOptions{})
return service, errors.Wrapf(err, "unable to get service %s/%s", namespace, name)
}
func (k *Kubernetes) CreateService(svc *v1.Service) (*v1.Service, error) {
ns := svc.Namespace
logrus.Debugf("creating service %s/%s", ns, svc.Name)
createdService, err := k.ClientSet.CoreV1().Services(ns).Create(context.TODO(), svc, metav1.CreateOptions{})
if err != nil {
return nil, errors.Wrapf(err, "unable to create service %s/%s", ns, svc.Name)
}
return createdService, nil
}
func (k *Kubernetes) DeleteService(namespace string, name string) error {
logrus.Debugf("deleting service %s/%s", namespace, name)
err := k.ClientSet.CoreV1().Services(namespace).Delete(context.TODO(), name, metav1.DeleteOptions{})
return errors.Wrapf(err, "unable to delete service %s/%s", namespace, name)
}
func (k *Kubernetes) GetServicesInNamespace(namespace string) ([]v1.Service, error) {
serviceList, err := k.ClientSet.CoreV1().Services(namespace).List(context.TODO(), metav1.ListOptions{})
if err != nil {
return nil, errors.Wrapf(err, "unable to get services in namespace %s", namespace)
}
return serviceList.Items, nil
}
func (k *Kubernetes) GetPodsInNamespace(namespace string) ([]v1.Pod, error) {
podList, err := k.ClientSet.CoreV1().Pods(namespace).List(context.TODO(), metav1.ListOptions{})
if err != nil {
return nil, errors.Wrapf(err, "unable to get pods in namespace %s", namespace)
}
return podList.Items, nil
}
func (k *Kubernetes) GetPod(namespace string, podName string) (*v1.Pod, error) {
pod, err := k.ClientSet.CoreV1().Pods(namespace).Get(context.TODO(), podName, metav1.GetOptions{})
return pod, errors.Wrapf(err, "unable to get pod %s/%s", namespace, podName)
}
func (k *Kubernetes) SetPodLabels(namespace string, podName string, labels map[string]string) (*v1.Pod, error) {
pod, err := k.GetPod(namespace, podName)
if err != nil {
return nil, err
}
pod.Labels = labels
updatedPod, err := k.ClientSet.CoreV1().Pods(namespace).Update(context.TODO(), pod, metav1.UpdateOptions{})
return updatedPod, errors.Wrapf(err, "unable to update pod %s/%s", namespace, podName)
}
func (k *Kubernetes) CreatePod(pod *v1.Pod) (*v1.Pod, error) {
ns := pod.Namespace
logrus.Debugf("creating pod %s/%s", ns, pod.Name)
createdPod, err := k.ClientSet.CoreV1().Pods(ns).Create(context.TODO(), pod, metav1.CreateOptions{})
return createdPod, errors.Wrapf(err, "unable to create pod %s/%s", ns, pod.Name)
}
func (k *Kubernetes) DeletePod(namespace string, podName string) error {
logrus.Debugf("deleting pod %s/%s", namespace, podName)
err := k.ClientSet.CoreV1().Pods(namespace).Delete(context.TODO(), podName, metav1.DeleteOptions{})
return errors.Wrapf(err, "unable to delete pod %s/%s", namespace, podName)
}
// ExecuteRemoteCommand executes a remote shell command on the given pod
// returns the output from stdout and stderr
func (k *Kubernetes) ExecuteRemoteCommand(namespace string, pod string, container string, command []string) (string, string, error, error) {
request := k.ClientSet.
CoreV1().
RESTClient().
Post().
Namespace(namespace).
Resource("pods").
Name(pod).
SubResource("exec").
Param("container", container).
//Timeout(5*time.Second). // TODO this seems to not do anything ... why ?
VersionedParams(
&v1.PodExecOptions{
Container: container,
Command: command,
Stdin: false,
Stdout: true,
Stderr: true,
TTY: true,
},
scheme.ParameterCodec)
exec, err := remotecommand.NewSPDYExecutor(k.RestConfig, "POST", request.URL())
if err != nil {
return "", "", nil, errors.Wrapf(err, "unable to instantiate SPDYExecutor")
}
buf := &bytes.Buffer{}
errBuf := &bytes.Buffer{}
err = exec.Stream(remotecommand.StreamOptions{
Stdout: buf,
Stderr: errBuf,
})
out, errOut := buf.String(), errBuf.String()
return out, errOut, errors.Wrapf(err, "unable to stream command"), nil
}