-
Notifications
You must be signed in to change notification settings - Fork 4.1k
/
event.go
180 lines (147 loc) · 4.96 KB
/
event.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
// Copyright 2015 Google Inc. 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 event
import (
"strings"
"github.com/kubernetes/dashboard/resource/common"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/types"
)
// FailedReasonPartials is an array of partial strings to correctly filter warning events.
// Have to be lower case for correct case insensitive comparison.
// Based on k8s official events reason file:
// https://github.com/kubernetes/kubernetes/blob/53f0f9d59860131c2be301a0054adfc86e43945d/pkg/kubelet/container/event.go
// Partial strings that are not in event.go file are added in order to support
// older versions of k8s which contained additional event reason messages.
var FailedReasonPartials = []string{"failed", "err", "exceeded", "invalid", "unhealthy",
"mismatch", "insufficient", "conflict", "outof", "nil"}
// GetPodsEventWarnings returns warning pod events by filtering out events targeting only given pods
// TODO(floreks) : Import and use Set instead of custom function to get rid of duplicates
func GetPodsEventWarnings(events []api.Event, pods []api.Pod) []common.Event {
result := make([]common.Event, 0)
// Filter out only warning events
events = getWarningEvents(events)
failedPods := make([]api.Pod, 0)
// Filter out only 'failed' pods
for _, pod := range pods {
if !isRunningOrSucceeded(pod) {
failedPods = append(failedPods, pod)
}
}
// Filter events by failed pods UID
events = FilterEventsByPodsUID(events, failedPods)
events = removeDuplicates(events)
for _, event := range events {
result = append(result, common.Event{
Message: event.Message,
Reason: event.Reason,
Type: event.Type,
})
}
return result
}
// FilterEventsByPodsUID returns filtered list of event objects.
// Events list is filtered to get only events targeting pods on the list.
func FilterEventsByPodsUID(events []api.Event, pods []api.Pod) []api.Event {
result := make([]api.Event, 0)
podEventMap := make(map[types.UID]bool, 0)
if len(pods) == 0 || len(events) == 0 {
return result
}
for _, pod := range pods {
podEventMap[pod.UID] = true
}
for _, event := range events {
if _, exists := podEventMap[event.InvolvedObject.UID]; exists {
result = append(result, event)
}
}
return result
}
// Returns filtered list of event objects.
// Event list object is filtered to get only warning events.
func getWarningEvents(events []api.Event) []api.Event {
if !IsTypeFilled(events) {
events = FillEventsType(events)
}
return filterEventsByType(events, api.EventTypeWarning)
}
// Filters kubernetes API event objects based on event type.
// Empty string will return all events.
func filterEventsByType(events []api.Event, eventType string) []api.Event {
if len(eventType) == 0 || len(events) == 0 {
return events
}
result := make([]api.Event, 0)
for _, event := range events {
if event.Type == eventType {
result = append(result, event)
}
}
return result
}
// IsTypeFilled returns true if all given events type is filled, false otherwise.
// This is needed as some older versions of kubernetes do not have Type property filled.
func IsTypeFilled(events []api.Event) bool {
if len(events) == 0 {
return false
}
for _, event := range events {
if len(event.Type) == 0 {
return false
}
}
return true
}
// IsFailedReason returns true if reason string contains any partial string indicating that this may be a
// warning, false otherwise
func IsFailedReason(reason string, partials ...string) bool {
for _, partial := range partials {
if strings.Contains(strings.ToLower(reason), partial) {
return true
}
}
return false
}
// Based on event Reason fills event Type in order to allow correct filtering by Type.
func FillEventsType(events []api.Event) []api.Event {
for i := range events {
if IsFailedReason(events[i].Reason, FailedReasonPartials...) {
events[i].Type = api.EventTypeWarning
} else {
events[i].Type = api.EventTypeNormal
}
}
return events
}
// Removes duplicate strings from the slice
func removeDuplicates(slice []api.Event) []api.Event {
visited := make(map[string]bool, 0)
result := make([]api.Event, 0)
for _, elem := range slice {
if !visited[elem.Reason] {
visited[elem.Reason] = true
result = append(result, elem)
}
}
return result
}
// Returns true if given pod is in state running or succeeded, false otherwise
func isRunningOrSucceeded(pod api.Pod) bool {
switch pod.Status.Phase {
case api.PodRunning, api.PodSucceeded:
return true
}
return false
}