/
get_instances.go
232 lines (198 loc) · 6.3 KB
/
get_instances.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
220
221
222
223
224
225
226
227
228
229
230
231
232
/*
Copyright 2020 The Kubernetes Authors.
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 main
import (
"context"
"encoding/json"
"fmt"
"io"
"strings"
"k8s.io/kops/pkg/cloudinstances"
"k8s.io/kops/pkg/commands/commandutils"
"k8s.io/kubectl/pkg/util/i18n"
"k8s.io/kubectl/pkg/util/templates"
"sigs.k8s.io/yaml"
"k8s.io/klog/v2"
"k8s.io/client-go/kubernetes"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/cli-runtime/pkg/genericclioptions"
"k8s.io/kops/util/pkg/tables"
"k8s.io/kops/pkg/apis/kops"
"github.com/spf13/cobra"
"k8s.io/kops/cmd/kops/util"
"k8s.io/kops/upup/pkg/fi/cloudup"
)
var (
getInstancesExample = templates.Examples(i18n.T(`
# Display all instances.
kops get instances
`))
getInstancesShort = i18n.T(`Display cluster instances.`)
)
type renderableCloudInstance struct {
ID string `json:"id"`
NodeName string `json:"nodeName,omitempty"`
Status string `json:"status"`
Roles []string `json:"roles"`
InternalIP string `json:"internalIP"`
InstanceGroup string `json:"instanceGroup"`
MachineType string `json:"machineType"`
State string `json:"state"`
}
func NewCmdGetInstances(f *util.Factory, out io.Writer, options *GetOptions) *cobra.Command {
cmd := &cobra.Command{
Use: "instances [CLUSTER]",
Short: getInstancesShort,
Example: getInstancesExample,
Args: rootCommand.clusterNameArgs(&options.ClusterName),
ValidArgsFunction: commandutils.CompleteClusterName(f, true, false),
RunE: func(cmd *cobra.Command, args []string) error {
return RunGetInstances(cmd.Context(), f, out, options)
},
}
return cmd
}
func RunGetInstances(ctx context.Context, f *util.Factory, out io.Writer, options *GetOptions) error {
clientset, err := f.KopsClient()
if err != nil {
return err
}
cluster, err := clientset.GetCluster(ctx, options.ClusterName)
if err != nil {
return err
}
if cluster == nil {
return fmt.Errorf("cluster not found %q", options.ClusterName)
}
cloud, err := cloudup.BuildCloud(cluster)
if err != nil {
return err
}
k8sClient, err := createK8sClient(cluster)
if err != nil {
return err
}
nodeList, err := k8sClient.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
if err != nil {
klog.Warningf("cannot list node names. Kubernetes API unavailable: %v", err)
}
igList, err := clientset.InstanceGroupsFor(cluster).List(ctx, metav1.ListOptions{})
if err != nil {
return err
}
var instanceGroups []*kops.InstanceGroup
for i := range igList.Items {
instanceGroups = append(instanceGroups, &igList.Items[i])
}
var cloudInstances []*cloudinstances.CloudInstance
cloudGroups, err := cloud.GetCloudGroups(cluster, instanceGroups, false, nodeList.Items)
if err != nil {
return err
}
for _, cg := range cloudGroups {
cloudInstances = append(cloudInstances, cg.Ready...)
cloudInstances = append(cloudInstances, cg.NeedUpdate...)
cg.AdjustNeedUpdate()
}
switch options.Output {
case OutputTable:
return instanceOutputTable(cloudInstances, out)
case OutputYaml:
y, err := yaml.Marshal(asRenderable(cloudInstances))
if err != nil {
return fmt.Errorf("unable to marshal YAML: %v", err)
}
if _, err := out.Write(y); err != nil {
return fmt.Errorf("error writing to output: %v", err)
}
return nil
case OutputJSON:
j, err := json.Marshal(asRenderable(cloudInstances))
if err != nil {
return fmt.Errorf("unable to marshal JSON: %v", err)
}
if _, err := out.Write(j); err != nil {
return fmt.Errorf("error writing to output: %v", err)
}
return nil
default:
return fmt.Errorf("unsupported output format: %q", options.Output)
}
}
func instanceOutputTable(instances []*cloudinstances.CloudInstance, out io.Writer) error {
fmt.Println("")
t := &tables.Table{}
t.AddColumn("ID", func(i *cloudinstances.CloudInstance) string {
return i.ID
})
t.AddColumn("NODE-NAME", func(i *cloudinstances.CloudInstance) string {
node := i.Node
if node == nil {
return ""
} else {
return node.Name
}
})
t.AddColumn("STATUS", func(i *cloudinstances.CloudInstance) string {
return i.Status
})
t.AddColumn("ROLES", func(i *cloudinstances.CloudInstance) string {
return strings.Join(i.Roles, ", ")
})
t.AddColumn("INTERNAL-IP", func(i *cloudinstances.CloudInstance) string {
return i.PrivateIP
})
t.AddColumn("INSTANCE-GROUP", func(i *cloudinstances.CloudInstance) string {
return i.CloudInstanceGroup.HumanName
})
t.AddColumn("MACHINE-TYPE", func(i *cloudinstances.CloudInstance) string {
return i.MachineType
})
t.AddColumn("STATE", func(i *cloudinstances.CloudInstance) string {
return string(i.State)
})
columns := []string{"ID", "NODE-NAME", "STATUS", "ROLES", "STATE", "INTERNAL-IP", "INSTANCE-GROUP", "MACHINE-TYPE"}
return t.Render(instances, out, columns...)
}
func createK8sClient(cluster *kops.Cluster) (*kubernetes.Clientset, error) {
contextName := cluster.ObjectMeta.Name
clientGetter := genericclioptions.NewConfigFlags(true)
clientGetter.Context = &contextName
config, err := clientGetter.ToRESTConfig()
if err != nil {
return nil, fmt.Errorf("cannot load kubecfg settings for %q: %v", contextName, err)
}
k8sClient, err := kubernetes.NewForConfig(config)
if err != nil {
return nil, fmt.Errorf("cannot build kubernetes api client for %q: %v", contextName, err)
}
return k8sClient, nil
}
func asRenderable(instances []*cloudinstances.CloudInstance) []*renderableCloudInstance {
arr := make([]*renderableCloudInstance, len(instances))
for i, ci := range instances {
arr[i] = &renderableCloudInstance{
ID: ci.ID,
Status: ci.Status,
Roles: ci.Roles,
InternalIP: ci.PrivateIP,
InstanceGroup: ci.CloudInstanceGroup.HumanName,
MachineType: ci.MachineType,
State: string(ci.State),
}
if ci.Node != nil {
arr[i].NodeName = ci.Node.Name
}
}
return arr
}