/
alerts.go
246 lines (208 loc) · 6.57 KB
/
alerts.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
/*
Package sdk is the gRPC implementation of the SDK gRPC server
Copyright 2018 Portworx
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 sdk
import (
"context"
"time"
"github.com/libopenstorage/openstorage/alerts"
"github.com/libopenstorage/openstorage/api"
"github.com/libopenstorage/openstorage/pkg/proto/time"
"golang.org/x/sync/errgroup"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
const (
alertChunkSize = 128
)
// alertsServer implements api.OpenStorageAlertsServer.
// In order to use this server implementation just have
// alertsServer pointer properly instantiated with a valid
// alerts.filterDeleter.
type alertsServer struct {
server serverAccessor
}
func (s *alertsServer) alert() alerts.FilterDeleter {
return s.server.alert()
}
// NewAlertsServer provides an instance of alerts server interface.
func NewAlertsServer(filterDeleter alerts.FilterDeleter) api.OpenStorageAlertsServer {
return &alertsServer{
server: &sdkGrpcServer{alertHandler: filterDeleter},
}
}
func getOpts(opts []*api.SdkAlertsOption) []alerts.Option {
var options []alerts.Option
for _, opt := range opts {
switch opt.GetOpt().(type) {
case *api.SdkAlertsOption_MinSeverityType:
options = append(options,
alerts.NewMinSeverityOption(opt.GetMinSeverityType()))
case *api.SdkAlertsOption_IsCleared:
options = append(options,
alerts.NewFlagCheckOption(opt.GetIsCleared()))
case *api.SdkAlertsOption_TimeSpan:
options = append(options,
alerts.NewTimeSpanOption(
prototime.TimestampToTime(opt.GetTimeSpan().GetStartTime()),
prototime.TimestampToTime(opt.GetTimeSpan().GetEndTime())))
case *api.SdkAlertsOption_CountSpan:
options = append(options,
alerts.NewCountSpanOption(
opt.GetCountSpan().GetMinCount(),
opt.GetCountSpan().GetMaxCount()))
}
}
return options
}
func getFilters(queries []*api.SdkAlertsQuery) []alerts.Filter {
var filters []alerts.Filter
// range over all queries
for _, x := range queries {
switch x.GetQuery().(type) {
case *api.SdkAlertsQuery_ResourceTypeQuery:
q := x.GetResourceTypeQuery()
filters = append(filters,
alerts.NewResourceTypeFilter(
q.ResourceType,
getOpts(x.GetOpts())...))
case *api.SdkAlertsQuery_AlertTypeQuery:
q := x.GetAlertTypeQuery()
filters = append(filters,
alerts.NewAlertTypeFilter(
q.AlertType,
q.ResourceType,
getOpts(x.GetOpts())...))
case *api.SdkAlertsQuery_ResourceIdQuery:
q := x.GetResourceIdQuery()
filters = append(filters,
alerts.NewResourceIDFilter(
q.ResourceId,
q.AlertType,
q.ResourceType,
getOpts(x.GetOpts())...))
}
}
return filters
}
// EnumerateWithFilters implements api.OpenStorageAlertsServer for alertsServer.
// Input context should ideally have a deadline, in which case, a
// graceful exit is ensured within that deadline.
func (g *alertsServer) EnumerateWithFilters(request *api.SdkAlertsEnumerateWithFiltersRequest, stream api.OpenStorageAlerts_EnumerateWithFiltersServer) error {
ctx := stream.Context()
if g.alert() == nil {
return status.Error(codes.Unavailable, "Resource has not been initialized")
}
queries := request.GetQueries()
if queries == nil {
return status.Error(codes.InvalidArgument, "Must provide at least one query")
}
// if input has deadline, ensure graceful exit within that deadline.
deadline, ok := ctx.Deadline()
var cancel context.CancelFunc
if ok {
// create a new context that will get done on deadline
ctx, cancel = context.WithTimeout(ctx, deadline.Sub(time.Now()))
defer cancel()
}
group, _ := errgroup.WithContext(ctx)
errChan := make(chan error)
filters := getFilters(queries)
// spawn err-group process.
group.Go(func() error {
if out, err := g.alert().Enumerate(filters...); err != nil {
return err
} else {
for i := 0; ; i++ {
start := i * alertChunkSize
stop := (i + 1) * alertChunkSize
if start >= len(out) {
break
}
if stop > len(out) {
stop = len(out)
}
resp := new(api.SdkAlertsEnumerateWithFiltersResponse)
resp.Alerts = append(resp.Alerts, out[start:stop]...)
if err := stream.Send(resp); err != nil {
return err
}
if stop == len(out) {
break
}
}
return nil
}
})
// wait for err-group processes to be done
go func() {
errChan <- group.Wait()
}()
// wait only as long as context deadline allows
select {
case err := <-errChan:
if err != nil {
return status.Errorf(codes.Internal, "error enumerating alerts: %v", err)
} else {
return nil
}
case <-ctx.Done():
return status.Error(codes.DeadlineExceeded,
"Deadline is reached, server side func exiting")
}
}
// Delete implements api.OpenStorageAlertsServer for alertsServer.
// Input context should ideally have a deadline, in which case, a
// graceful exit is ensured within that deadline.
func (g *alertsServer) Delete(ctx context.Context,
request *api.SdkAlertsDeleteRequest) (*api.SdkAlertsDeleteResponse, error) {
if g.alert() == nil {
return nil, status.Error(codes.Unavailable, "Resource has not been initialized")
}
queries := request.GetQueries()
if queries == nil {
return nil, status.Error(codes.InvalidArgument, "Must provide at least one query")
}
// if input has deadline, ensure graceful exit within that deadline.
deadline, ok := ctx.Deadline()
var cancel context.CancelFunc
if ok {
// create a new context that will get done on deadline
ctx, cancel = context.WithTimeout(ctx, deadline.Sub(time.Now()))
defer cancel()
}
group, _ := errgroup.WithContext(ctx)
errChan := make(chan error)
resp := new(api.SdkAlertsDeleteResponse)
filters := getFilters(queries)
// spawn err-group process.
group.Go(func() error {
return g.alert().Delete(filters...)
})
// wait for err-group processes to be done
go func() {
errChan <- group.Wait()
}()
// wait only as long as context deadline allows
select {
case err := <-errChan:
if err != nil {
return nil, status.Errorf(codes.Internal, "error deleting alerts: %v", err)
} else {
return resp, nil
}
case <-ctx.Done():
return nil, status.Error(codes.DeadlineExceeded,
"Deadline is reached, server side func exiting")
}
}