forked from openshift/origin
-
Notifications
You must be signed in to change notification settings - Fork 1
/
expose.go
198 lines (168 loc) · 7.03 KB
/
expose.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
package cmd
import (
"fmt"
"github.com/spf13/cobra"
kapi "k8s.io/kubernetes/pkg/apis/core"
"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
kcmd "k8s.io/kubernetes/pkg/kubectl/cmd"
"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
kcmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
"k8s.io/kubernetes/pkg/kubectl/genericclioptions"
"k8s.io/kubernetes/pkg/kubectl/genericclioptions/resource"
"github.com/openshift/origin/pkg/oc/util/ocscheme"
"github.com/openshift/origin/pkg/oc/util/route"
)
var (
exposeLong = templates.LongDesc(`
Expose containers internally as services or externally via routes
There is also the ability to expose a deployment configuration, replication controller, service, or pod
as a new service on a specified port. If no labels are specified, the new object will re-use the
labels from the object it exposes.`)
exposeExample = templates.Examples(`
# Create a route based on service nginx. The new route will re-use nginx's labels
%[1]s expose service nginx
# Create a route and specify your own label and route name
%[1]s expose service nginx -l name=myroute --name=fromdowntown
# Create a route and specify a hostname
%[1]s expose service nginx --hostname=www.example.com
# Create a route with wildcard
%[1]s expose service nginx --hostname=x.example.com --wildcard-policy=Subdomain
This would be equivalent to *.example.com. NOTE: only hosts are matched by the wildcard, subdomains would not be included.
# Expose a deployment configuration as a service and use the specified port
%[1]s expose dc ruby-hello-world --port=8080
# Expose a service as a route in the specified path
%[1]s expose service nginx --path=/nginx
# Expose a service using different generators
%[1]s expose service nginx --name=exposed-svc --port=12201 --protocol="TCP" --generator="service/v2"
%[1]s expose service nginx --name=my-route --port=12201 --generator="route/v1"
Exposing a service using the "route/v1" generator (default) will create a new exposed route with the "--name" provided
(or the name of the service otherwise). You may not specify a "--protocol" or "--target-port" option when using this generator.`)
)
type ExposeOptions struct {
Hostname string
Path string
WildcardPolicy string
Namespace string
EnforceNamespace bool
Clientset internalclientset.Interface
Builder func() *resource.Builder
Args []string
Generator string
Filenames []string
Port string
Protocol string
}
func NewExposeOptions() *ExposeOptions {
return &ExposeOptions{}
}
// NewCmdExpose is a wrapper for the Kubernetes cli expose command
func NewCmdExpose(fullName string, f kcmdutil.Factory, streams genericclioptions.IOStreams) *cobra.Command {
o := NewExposeOptions()
cmd := kcmd.NewCmdExposeService(f, streams)
cmd.Short = "Expose a replicated application as a service or route"
cmd.Long = exposeLong
cmd.Example = fmt.Sprintf(exposeExample, fullName)
// Default generator to an empty string so we can get more flexibility
// when setting defaults based on input resources
cmd.Flags().Set("generator", "")
cmd.Flag("generator").Usage = "The name of the API generator to use. Defaults to \"route/v1\". Available generators include \"service/v1\", \"service/v2\", and \"route/v1\". \"service/v1\" will automatically name the port \"default\", while \"service/v2\" will leave it unnamed."
cmd.Flag("generator").DefValue = ""
// Default protocol to an empty string so we can get more flexibility
// when validating the use of it (invalid for routes)
cmd.Flags().Set("protocol", "")
cmd.Flag("protocol").DefValue = ""
cmd.Flag("protocol").Changed = false
cmd.Flag("port").Usage = "The port that the resource should serve on."
defRun := cmd.Run
cmd.Run = func(cmd *cobra.Command, args []string) {
kcmdutil.CheckErr(o.Complete(cmd, f, args))
kcmdutil.CheckErr(o.Validate(cmd))
defRun(cmd, args)
}
cmd.Flags().StringVar(&o.Hostname, "hostname", o.Hostname, "Set a hostname for the new route")
cmd.Flags().StringVar(&o.Path, "path", o.Path, "Set a path for the new route")
cmd.Flags().StringVar(&o.WildcardPolicy, "wildcard-policy", o.WildcardPolicy, "Sets the WildcardPolicy for the hostname, the default is \"None\". Valid values are \"None\" and \"Subdomain\"")
return cmd
}
func (o *ExposeOptions) Complete(cmd *cobra.Command, f kcmdutil.Factory, args []string) error {
var err error
o.Namespace, o.EnforceNamespace, err = f.ToRawKubeConfigLoader().Namespace()
if err != nil {
return err
}
o.Clientset, err = f.ClientSet()
if err != nil {
return err
}
o.Builder = f.NewBuilder
o.Args = args
o.Generator = kcmdutil.GetFlagString(cmd, "generator")
o.Filenames = kcmdutil.GetFlagStringSlice(cmd, "filename")
o.Port = kcmdutil.GetFlagString(cmd, "port")
o.Protocol = kcmdutil.GetFlagString(cmd, "protocol")
return nil
}
// Validate adds one layer of validation prior to calling the upstream
// expose command.
func (o *ExposeOptions) Validate(cmd *cobra.Command) error {
r := o.Builder().
WithScheme(ocscheme.ReadingInternalScheme).
ContinueOnError().
NamespaceParam(o.Namespace).DefaultNamespace().
FilenameParam(o.EnforceNamespace, &resource.FilenameOptions{Recursive: false, Filenames: o.Filenames}).
ResourceTypeOrNameArgs(false, o.Args...).
Flatten().
Do()
infos, err := r.Infos()
if err != nil {
return err
}
if len(o.WildcardPolicy) > 0 && (o.WildcardPolicy != "Subdomain" && o.WildcardPolicy != "None") {
return fmt.Errorf("only \"Subdomain\" or \"None\" are supported for wildcard-policy")
}
if len(infos) > 1 {
return fmt.Errorf("multiple resources provided: %v", o.Args)
}
info := infos[0]
mapping := info.ResourceMapping()
switch mapping.GroupVersionKind.GroupKind() {
case kapi.Kind("Service"):
switch o.Generator {
case "service/v1", "service/v2":
// Set default protocol back for generating services
if len(o.Protocol) == 0 {
cmd.Flags().Set("protocol", "TCP")
}
case "":
// Default exposing services as a route
cmd.Flags().Set("generator", "route/v1")
fallthrough
case "route/v1":
// The upstream generator will incorrectly chose service.Port instead of service.TargetPort
// for the route TargetPort when no port is present. Passing forcePort=true
// causes UnsecuredRoute to always set a Port so the upstream default is not used.
route, err := route.UnsecuredRoute(o.Clientset, o.Namespace, info.Name, info.Name, o.Port, true)
if err != nil {
return err
}
if route.Spec.Port != nil {
cmd.Flags().Set("port", route.Spec.Port.TargetPort.String())
}
}
default:
switch o.Generator {
case "route/v1":
return fmt.Errorf("cannot expose a %s as a route", mapping.GroupVersionKind.Kind)
case "":
// Default exposing everything except services as a service
cmd.Flags().Set("generator", "service/v2")
fallthrough
case "service/v1", "service/v2":
// Set default protocol back for generating services
if len(kcmdutil.GetFlagString(cmd, "protocol")) == 0 {
cmd.Flags().Set("protocol", "TCP")
}
}
}
return nil
}