/
nfs.go
317 lines (265 loc) · 10.3 KB
/
nfs.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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
/*
Copyright 2018 The Rook Authors. All rights reserved.
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 nfs manages NFS ganesha servers for Ceph
package nfs
import (
"context"
"fmt"
"strings"
"github.com/banzaicloud/k8s-objectmatcher/patch"
"github.com/pkg/errors"
cephv1 "github.com/rook/rook/pkg/apis/ceph.rook.io/v1"
"github.com/rook/rook/pkg/clusterd"
cephclient "github.com/rook/rook/pkg/daemon/ceph/client"
opmon "github.com/rook/rook/pkg/operator/ceph/cluster/mon"
"github.com/rook/rook/pkg/operator/ceph/config"
"github.com/rook/rook/pkg/operator/k8sutil"
v1 "k8s.io/api/core/v1"
kerrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
)
const (
ganeshaRadosGraceCmd = "ganesha-rados-grace"
// Default RADOS pool name after the NFS changes in Ceph
postNFSChangeDefaultPoolName = ".nfs"
// Default RADOS pool name before the NFS changes in Ceph
preNFSChangeDefaultPoolName = "nfs-ganesha"
)
var updateDeploymentAndWait = opmon.UpdateCephDeploymentAndWait
type daemonConfig struct {
ID string // letter ID of daemon (e.g., a, b, c, ...)
ConfigConfigMap string // name of configmap holding config
DataPathMap *config.DataPathMap // location to store data in container
}
// Create the ganesha server
func (r *ReconcileCephNFS) upCephNFS(n *cephv1.CephNFS) error {
ctx := context.TODO()
for i := 0; i < n.Spec.Server.Active; i++ {
id := k8sutil.IndexToName(i)
configName, err := r.createConfigMap(n, id)
if err != nil {
return errors.Wrap(err, "failed to create config")
}
err = r.addRADOSConfigFile(n, id)
if err != nil {
return errors.Wrap(err, "failed to create RADOS config object")
}
cfg := daemonConfig{
ID: id,
ConfigConfigMap: configName,
DataPathMap: &config.DataPathMap{
HostDataDir: "", // nfs daemon does not store data on host, ...
ContainerDataDir: cephclient.DefaultConfigDir, // does share data in containers using emptyDir, ...
HostLogAndCrashDir: "", // and does not log to /var/log/ceph dir
},
}
err = r.generateKeyring(n, id)
if err != nil {
return errors.Wrapf(err, "failed to generate keyring for %q", id)
}
// create the deployment
deployment, err := r.makeDeployment(n, cfg)
if err != nil {
return errors.Wrap(err, "failed to set to create deployment")
}
// Set owner ref to cephNFS object
err = controllerutil.SetControllerReference(n, deployment, r.scheme)
if err != nil {
return errors.Wrapf(err, "failed to set owner reference for ceph nfs deployment %q", deployment.Name)
}
// Set the deployment hash as an annotation
err = patch.DefaultAnnotator.SetLastAppliedAnnotation(deployment)
if err != nil {
return errors.Wrapf(err, "failed to set annotation for deployment %q", deployment.Name)
}
// start the deployment
_, err = r.context.Clientset.AppsV1().Deployments(n.Namespace).Create(ctx, deployment, metav1.CreateOptions{})
if err != nil {
if !kerrors.IsAlreadyExists(err) {
return errors.Wrap(err, "failed to create ceph nfs deployment")
}
logger.Infof("ceph nfs deployment %q already exists. updating if needed", deployment.Name)
if err := updateDeploymentAndWait(r.context, r.clusterInfo, deployment, "nfs", id, r.cephClusterSpec.SkipUpgradeChecks, false); err != nil {
return errors.Wrapf(err, "failed to update ceph nfs deployment %q", deployment.Name)
}
} else {
logger.Infof("ceph nfs deployment %q started", deployment.Name)
}
// create a service
err = r.createCephNFSService(n, cfg)
if err != nil {
return errors.Wrap(err, "failed to create ceph nfs service")
}
// Add server to database
err = r.addServerToDatabase(n, id)
if err != nil {
return errors.Wrapf(err, "failed to add server %q to database", id)
}
}
return nil
}
// Create empty config file for new ganesha server
func (r *ReconcileCephNFS) addRADOSConfigFile(n *cephv1.CephNFS, name string) error {
config := getGaneshaConfigObject(n, r.clusterInfo.CephVersion, name)
cmd := "rados"
args := []string{
"--pool", n.Spec.RADOS.Pool,
"--namespace", n.Spec.RADOS.Namespace,
"--conf", cephclient.CephConfFilePath(r.context.ConfigDir, n.Namespace),
}
err := r.context.Executor.ExecuteCommand(cmd, append(args, "stat", config)...)
if err == nil {
// If stat works then we assume it's present already
return nil
}
// try to create it
return r.context.Executor.ExecuteCommand(cmd, append(args, "create", config)...)
}
func (r *ReconcileCephNFS) addServerToDatabase(nfs *cephv1.CephNFS, name string) error {
logger.Infof("adding ganesha %q to grace db", name)
if err := r.runGaneshaRadosGrace(nfs, name, "add"); err != nil {
return errors.Wrapf(err, "failed to add %q to grace db", name)
}
return nil
}
func (r *ReconcileCephNFS) removeServerFromDatabase(nfs *cephv1.CephNFS, name string) {
logger.Infof("removing ganesha %q from grace db", name)
if err := r.runGaneshaRadosGrace(nfs, name, "remove"); err != nil {
logger.Errorf("failed to remove %q from grace db. %v", name, err)
}
}
func (r *ReconcileCephNFS) runGaneshaRadosGrace(nfs *cephv1.CephNFS, name, action string) error {
nodeID := getNFSNodeID(nfs, name)
cmd := ganeshaRadosGraceCmd
args := []string{"--pool", nfs.Spec.RADOS.Pool, "--ns", nfs.Spec.RADOS.Namespace, action, nodeID}
env := []string{fmt.Sprintf("CEPH_CONF=%s", cephclient.CephConfFilePath(r.context.ConfigDir, nfs.Namespace))}
return r.context.Executor.ExecuteCommandWithEnv(env, cmd, args...)
}
func (r *ReconcileCephNFS) generateConfigMap(n *cephv1.CephNFS, name string) *v1.ConfigMap {
data := map[string]string{
"config": getGaneshaConfig(n, r.clusterInfo.CephVersion, name),
}
configMap := &v1.ConfigMap{
ObjectMeta: metav1.ObjectMeta{
Name: instanceName(n, name),
Namespace: n.Namespace,
Labels: getLabels(n, name, true),
},
Data: data,
}
return configMap
}
func (r *ReconcileCephNFS) createConfigMap(n *cephv1.CephNFS, name string) (string, error) {
ctx := context.TODO()
// Generate configMap
configMap := r.generateConfigMap(n, name)
// Set owner reference
err := controllerutil.SetControllerReference(n, configMap, r.scheme)
if err != nil {
return "", errors.Wrapf(err, "failed to set owner reference for ceph ganesha configmap %q", configMap.Name)
}
if _, err := r.context.Clientset.CoreV1().ConfigMaps(n.Namespace).Create(ctx, configMap, metav1.CreateOptions{}); err != nil {
if !kerrors.IsAlreadyExists(err) {
return "", errors.Wrap(err, "failed to create ganesha config map")
}
logger.Debugf("updating config map %q that already exists", configMap.Name)
if _, err = r.context.Clientset.CoreV1().ConfigMaps(n.Namespace).Update(ctx, configMap, metav1.UpdateOptions{}); err != nil {
return "", errors.Wrap(err, "failed to update ganesha config map")
}
}
return configMap.Name, nil
}
// Down scale the ganesha server
func (r *ReconcileCephNFS) downCephNFS(n *cephv1.CephNFS, nfsServerListNum int) error {
ctx := context.TODO()
diffCount := nfsServerListNum - n.Spec.Server.Active
for i := 0; i < diffCount; {
depIDToRemove := nfsServerListNum - 1
name := k8sutil.IndexToName(depIDToRemove)
depNameToRemove := instanceName(n, name)
// Remove deployment
logger.Infof("removing deployment %q", depNameToRemove)
err := r.context.Clientset.AppsV1().Deployments(n.Namespace).Delete(ctx, depNameToRemove, metav1.DeleteOptions{})
if err != nil {
if !kerrors.IsNotFound(err) {
return errors.Wrap(err, "failed to delete ceph nfs deployment")
}
}
// Remove from grace db
r.removeServerFromDatabase(n, name)
nfsServerListNum = nfsServerListNum - 1
i++
}
return nil
}
func (r *ReconcileCephNFS) removeServersFromDatabase(n *cephv1.CephNFS, newActive int) error {
for i := n.Spec.Server.Active - 1; i >= newActive; i-- {
name := k8sutil.IndexToName(i)
r.removeServerFromDatabase(n, name)
}
return nil
}
func instanceName(n *cephv1.CephNFS, name string) string {
return fmt.Sprintf("%s-%s-%s", AppName, n.Name, name)
}
func validateGanesha(context *clusterd.Context, clusterInfo *cephclient.ClusterInfo, n *cephv1.CephNFS) error {
// core properties
if n.Name == "" {
return errors.New("missing name")
}
if n.Namespace == "" {
return errors.New("missing namespace")
}
// Client recovery properties
if n.Spec.RADOS.Pool == "" {
return errors.New("missing RADOS.pool")
}
if n.Spec.RADOS.Namespace == "" {
return errors.New("missing RADOS.namespace")
}
// Ganesha server properties
if n.Spec.Server.Active == 0 {
return errors.New("at least one active server required")
}
return nil
}
// create and enable default RADOS pool
func createDefaultNFSRADOSPool(context *clusterd.Context, clusterInfo *cephclient.ClusterInfo, defaultRadosPoolName string) error {
args := []string{"osd", "pool", "create", defaultRadosPoolName}
_, err := cephclient.NewCephCommand(context, clusterInfo, args).Run()
if err != nil {
return err
}
args = []string{"osd", "pool", "application", "enable", defaultRadosPoolName, "nfs"}
_, err = cephclient.NewCephCommand(context, clusterInfo, args).Run()
if err != nil {
return err
}
return nil
}
func fetchOrCreatePool(context *clusterd.Context, clusterInfo *cephclient.ClusterInfo, n *cephv1.CephNFS) error {
// The existence of the pool provided in n.Spec.RADOS.Pool is necessary otherwise addRADOSConfigFile() will fail
_, err := cephclient.GetPoolDetails(context, clusterInfo, n.Spec.RADOS.Pool)
if err != nil {
if strings.Contains(err.Error(), "unrecognized pool") && clusterInfo.CephVersion.IsAtLeastPacific() {
err := createDefaultNFSRADOSPool(context, clusterInfo, n.Spec.RADOS.Pool)
if err != nil {
return errors.Wrapf(err, "failed to find %q pool and unable to create it", n.Spec.RADOS.Pool)
}
return nil
}
return errors.Wrapf(err, "pool %q not found", n.Spec.RADOS.Pool)
}
return nil
}