/
render.go
200 lines (174 loc) · 5.98 KB
/
render.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
package render
import (
"errors"
"fmt"
"io/ioutil"
"path/filepath"
"github.com/ghodss/yaml"
"github.com/golang/glog"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
kubecontrolplanev1 "github.com/openshift/api/kubecontrolplane/v1"
"github.com/openshift/cluster-kube-apiserver-operator/pkg/operator/v311_00_assets"
genericrender "github.com/openshift/library-go/pkg/operator/render"
genericrenderoptions "github.com/openshift/library-go/pkg/operator/render/options"
)
const (
bootstrapVersion = "v3.11.0"
)
// renderOpts holds values to drive the render command.
type renderOpts struct {
manifest genericrenderoptions.ManifestOptions
generic genericrenderoptions.GenericOptions
lockHostPath string
etcdServerURLs []string
etcdServingCA string
clusterConfigFile string
}
// NewRenderCommand creates a render command.
func NewRenderCommand() *cobra.Command {
renderOpts := renderOpts{
generic: *genericrenderoptions.NewGenericOptions(),
manifest: *genericrenderoptions.NewManifestOptions("kube-apiserver", "openshift/origin-hypershift:latest"),
lockHostPath: "/var/run/kubernetes/lock",
etcdServerURLs: []string{"https://127.0.0.1:2379"},
etcdServingCA: "root-ca.crt",
}
cmd := &cobra.Command{
Use: "render",
Short: "Render kubernetes API server bootstrap manifests, secrets and configMaps",
Run: func(cmd *cobra.Command, args []string) {
if err := renderOpts.Validate(); err != nil {
glog.Fatal(err)
}
if err := renderOpts.Complete(); err != nil {
glog.Fatal(err)
}
if err := renderOpts.Run(); err != nil {
glog.Fatal(err)
}
},
}
renderOpts.AddFlags(cmd.Flags())
return cmd
}
func (r *renderOpts) AddFlags(fs *pflag.FlagSet) {
r.manifest.AddFlags(fs, "apiserver")
r.generic.AddFlags(fs, kubecontrolplanev1.GroupVersion.WithKind("KubeAPIServerConfig"))
fs.StringVar(&r.lockHostPath, "manifest-lock-host-path", r.lockHostPath, "A host path mounted into the apiserver pods to hold lock.")
fs.StringArrayVar(&r.etcdServerURLs, "manifest-etcd-server-urls", r.etcdServerURLs, "The etcd server URL, comma separated.")
fs.StringVar(&r.etcdServingCA, "manifest-etcd-serving-ca", r.etcdServingCA, "The etcd serving CA.")
fs.StringVar(&r.clusterConfigFile, "cluster-config-file", r.clusterConfigFile, "Openshift Cluster API Config file.")
}
// Validate verifies the inputs.
func (r *renderOpts) Validate() error {
if err := r.manifest.Validate(); err != nil {
return err
}
if err := r.generic.Validate(); err != nil {
return err
}
if len(r.lockHostPath) == 0 {
return errors.New("missing required flag: --manifest-lock-host-path")
}
if len(r.etcdServerURLs) == 0 {
return errors.New("missing etcd server URLs: --manifest-etcd-server-urls")
}
if len(r.etcdServingCA) == 0 {
return errors.New("missing etcd serving CA: --manifest-etcd-serving-ca")
}
return nil
}
// Complete fills in missing values before command execution.
func (r *renderOpts) Complete() error {
if err := r.manifest.Complete(); err != nil {
return err
}
if err := r.generic.Complete(); err != nil {
return err
}
return nil
}
type TemplateData struct {
genericrenderoptions.ManifestConfig
genericrenderoptions.FileConfig
// LockHostPath holds the api server lock file for bootstrap
LockHostPath string
// EtcdServerURLs is a list of etcd server URLs.
EtcdServerURLs []string
// EtcdServingCA is the serving CA used by the etcd servers.
EtcdServingCA string
// ClusterCIDR is the IP range for pod IPs.
ClusterCIDR []string
// ServiceClusterIPRange is the IP range for service IPs.
ServiceCIDR []string
}
// Run contains the logic of the render command.
func (r *renderOpts) Run() error {
renderConfig := TemplateData{
LockHostPath: r.lockHostPath,
EtcdServerURLs: r.etcdServerURLs,
EtcdServingCA: r.etcdServingCA,
}
if len(r.clusterConfigFile) > 0 {
clusterConfigFileData, err := ioutil.ReadFile(r.clusterConfigFile)
if err != nil {
return err
}
err = discoverCIDRs(clusterConfigFileData, &renderConfig)
if err != nil {
return fmt.Errorf("unable to parse restricted CIDRs from cluster-api config %q: %v", r.clusterConfigFile, err)
}
}
if err := r.manifest.ApplyTo(&renderConfig.ManifestConfig); err != nil {
return err
}
if err := r.generic.ApplyTo(
&renderConfig.FileConfig,
genericrenderoptions.Template{FileName: "defaultconfig.yaml", Content: v311_00_assets.MustAsset(filepath.Join(bootstrapVersion, "kube-apiserver", "defaultconfig.yaml"))},
mustReadTemplateFile(filepath.Join(r.generic.TemplatesDir, "config", "bootstrap-config-overrides.yaml")),
mustReadTemplateFile(filepath.Join(r.generic.TemplatesDir, "config", "config-overrides.yaml")),
&renderConfig,
); err != nil {
return err
}
return genericrender.WriteFiles(&r.generic, &renderConfig.FileConfig, renderConfig)
}
func mustReadTemplateFile(fname string) genericrenderoptions.Template {
bs, err := ioutil.ReadFile(fname)
if err != nil {
panic(fmt.Sprintf("Failed to load %q: %v", fname, err))
}
return genericrenderoptions.Template{FileName: fname, Content: bs}
}
func discoverCIDRs(clusterConfigFileData []byte, renderConfig *TemplateData) error {
configJson, err := yaml.YAMLToJSON(clusterConfigFileData)
if err != nil {
return err
}
clusterConfigObj, err := runtime.Decode(unstructured.UnstructuredJSONScheme, configJson)
if err != nil {
return err
}
clusterConfig, ok := clusterConfigObj.(*unstructured.Unstructured)
if !ok {
return fmt.Errorf("unexpected object in %t", clusterConfigObj)
}
if clusterCIDR, found, err := unstructured.NestedStringSlice(
clusterConfig.Object, "spec", "clusterNetwork", "pods", "cidrBlocks"); found && err == nil {
renderConfig.ClusterCIDR = clusterCIDR
}
if err != nil {
return err
}
if serviceCIDR, found, err := unstructured.NestedStringSlice(
clusterConfig.Object, "spec", "clusterNetwork", "services", "cidrBlocks"); found && err == nil {
renderConfig.ServiceCIDR = serviceCIDR
}
if err != nil {
return err
}
return nil
}