forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 0
/
azure_controller_common.go
241 lines (202 loc) · 7.89 KB
/
azure_controller_common.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
/*
Copyright 2018 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 azure
import (
"context"
"fmt"
"time"
"github.com/Azure/azure-sdk-for-go/services/compute/mgmt/2019-03-01/compute"
"github.com/golang/glog"
"k8s.io/apimachinery/pkg/types"
kwait "k8s.io/apimachinery/pkg/util/wait"
"k8s.io/kubernetes/pkg/cloudprovider"
"k8s.io/kubernetes/pkg/util/keymutex"
)
const (
storageAccountNameTemplate = "pvc%s"
// for limits check https://docs.microsoft.com/en-us/azure/azure-subscription-service-limits#storage-limits
maxStorageAccounts = 100 // max # is 200 (250 with special request). this allows 100 for everything else including stand alone disks
maxDisksPerStorageAccounts = 60
storageAccountUtilizationBeforeGrowing = 0.5
maxLUN = 64 // max number of LUNs per VM
errLeaseFailed = "AcquireDiskLeaseFailed"
errLeaseIDMissing = "LeaseIdMissing"
errContainerNotFound = "ContainerNotFound"
errDiskBlobNotFound = "DiskBlobNotFound"
)
var defaultBackOff = kwait.Backoff{
Steps: 20,
Duration: 2 * time.Second,
Factor: 1.5,
Jitter: 0.0,
}
// acquire lock to attach/detach disk in one node
var diskOpMutex = keymutex.NewHashed(0)
type controllerCommon struct {
subscriptionID string
location string
storageEndpointSuffix string
resourceGroup string
cloud *Cloud
}
// getNodeVMSet gets the VMSet interface based on config.VMType and the real virtual machine type.
func (c *controllerCommon) getNodeVMSet(nodeName types.NodeName) (VMSet, error) {
// 1. vmType is standard, return cloud.vmSet directly.
if c.cloud.VMType == vmTypeStandard {
return c.cloud.vmSet, nil
}
// 2. vmType is Virtual Machine Scale Set (vmss), convert vmSet to scaleSet.
ss, ok := c.cloud.vmSet.(*scaleSet)
if !ok {
return nil, fmt.Errorf("error of converting vmSet (%q) to scaleSet with vmType %q", c.cloud.vmSet, c.cloud.VMType)
}
// 3. If the node is managed by availability set, then return ss.availabilitySet.
managedByAS, err := ss.isNodeManagedByAvailabilitySet(mapNodeNameToVMName(nodeName))
if err != nil {
return nil, err
}
if managedByAS {
// vm is managed by availability set.
return ss.availabilitySet, nil
}
// 4. Node is managed by vmss
return ss, nil
}
// AttachDisk attaches a vhd to vm. The vhd must exist, can be identified by diskName, diskURI.
func (c *controllerCommon) AttachDisk(isManagedDisk bool, diskName, diskURI string, nodeName types.NodeName, cachingMode compute.CachingTypes) error {
vmset, err := c.getNodeVMSet(nodeName)
if err != nil {
return err
}
instanceid, err := c.cloud.InstanceID(context.TODO(), nodeName)
if err != nil {
glog.Warningf("failed to get azure instance id (%v)", err)
return fmt.Errorf("failed to get azure instance id for node %q (%v)", nodeName, err)
}
diskOpMutex.LockKey(instanceid)
defer diskOpMutex.UnlockKey(instanceid)
lun, err := c.GetNextDiskLun(nodeName)
if err != nil {
glog.Warningf("no LUN available for instance %q (%v)", nodeName, err)
return fmt.Errorf("all LUNs are used, cannot attach volume (%s, %s) to instance %q (%v)", diskName, diskURI, instanceid, err)
}
glog.V(2).Infof("Trying to attach volume %q lun %d to node %q.", diskURI, lun, nodeName)
return vmset.AttachDisk(isManagedDisk, diskName, diskURI, nodeName, lun, cachingMode)
}
// DetachDisk detaches a disk from host. The vhd can be identified by diskName or diskURI.
func (c *controllerCommon) DetachDisk(diskName, diskURI string, nodeName types.NodeName) error {
vmset, err := c.getNodeVMSet(nodeName)
if err != nil {
return err
}
instanceid, err := c.cloud.InstanceID(context.TODO(), nodeName)
if err != nil {
glog.Warningf("failed to get azure instance id (%v)", err)
return fmt.Errorf("failed to get azure instance id for node %q (%v)", nodeName, err)
}
glog.V(2).Infof("detach %v from node %q", diskURI, nodeName)
// make the lock here as small as possible
diskOpMutex.LockKey(instanceid)
resp, err := vmset.DetachDisk(diskName, diskURI, nodeName)
diskOpMutex.UnlockKey(instanceid)
if c.cloud.CloudProviderBackoff && shouldRetryHTTPRequest(resp, err) {
glog.V(2).Infof("azureDisk - update backing off: detach disk(%s, %s), err: %v", diskName, diskURI, err)
retryErr := kwait.ExponentialBackoff(c.cloud.requestBackoff(), func() (bool, error) {
diskOpMutex.LockKey(instanceid)
resp, err := vmset.DetachDisk(diskName, diskURI, nodeName)
diskOpMutex.UnlockKey(instanceid)
return c.cloud.processHTTPRetryResponse(nil, "", resp, err)
})
if retryErr != nil {
err = retryErr
glog.V(2).Infof("azureDisk - update abort backoff: detach disk(%s, %s), err: %v", diskName, diskURI, err)
}
}
if err != nil {
glog.Errorf("azureDisk - detach disk(%s, %s) failed, err: %v", diskName, diskURI, err)
} else {
glog.V(2).Infof("azureDisk - detach disk(%s, %s) succeeded", diskName, diskURI)
}
return err
}
// getNodeDataDisks invokes vmSet interfaces to get data disks for the node.
func (c *controllerCommon) getNodeDataDisks(nodeName types.NodeName) ([]compute.DataDisk, error) {
vmset, err := c.getNodeVMSet(nodeName)
if err != nil {
return nil, err
}
return vmset.GetDataDisks(nodeName)
}
// GetDiskLun finds the lun on the host that the vhd is attached to, given a vhd's diskName and diskURI.
func (c *controllerCommon) GetDiskLun(diskName, diskURI string, nodeName types.NodeName) (int32, error) {
disks, err := c.getNodeDataDisks(nodeName)
if err != nil {
glog.Errorf("error of getting data disks for node %q: %v", nodeName, err)
return -1, err
}
for _, disk := range disks {
if disk.Lun != nil && (disk.Name != nil && diskName != "" && *disk.Name == diskName) ||
(disk.Vhd != nil && disk.Vhd.URI != nil && diskURI != "" && *disk.Vhd.URI == diskURI) ||
(disk.ManagedDisk != nil && *disk.ManagedDisk.ID == diskURI) {
// found the disk
glog.V(2).Infof("azureDisk - find disk: lun %d name %q uri %q", *disk.Lun, diskName, diskURI)
return *disk.Lun, nil
}
}
return -1, fmt.Errorf("Cannot find Lun for disk %s", diskName)
}
// GetNextDiskLun searches all vhd attachment on the host and find unused lun. Return -1 if all luns are used.
func (c *controllerCommon) GetNextDiskLun(nodeName types.NodeName) (int32, error) {
disks, err := c.getNodeDataDisks(nodeName)
if err != nil {
glog.Errorf("error of getting data disks for node %q: %v", nodeName, err)
return -1, err
}
used := make([]bool, maxLUN)
for _, disk := range disks {
if disk.Lun != nil {
used[*disk.Lun] = true
}
}
for k, v := range used {
if !v {
return int32(k), nil
}
}
return -1, fmt.Errorf("all luns are used")
}
// DisksAreAttached checks if a list of volumes are attached to the node with the specified NodeName.
func (c *controllerCommon) DisksAreAttached(diskNames []string, nodeName types.NodeName) (map[string]bool, error) {
attached := make(map[string]bool)
for _, diskName := range diskNames {
attached[diskName] = false
}
disks, err := c.getNodeDataDisks(nodeName)
if err != nil {
if err == cloudprovider.InstanceNotFound {
// if host doesn't exist, no need to detach
glog.Warningf("azureDisk - Cannot find node %q, DisksAreAttached will assume disks %v are not attached to it.",
nodeName, diskNames)
return attached, nil
}
return attached, err
}
for _, disk := range disks {
for _, diskName := range diskNames {
if disk.Name != nil && diskName != "" && *disk.Name == diskName {
attached[diskName] = true
}
}
}
return attached, nil
}