-
Notifications
You must be signed in to change notification settings - Fork 799
/
gameservers_count.go
86 lines (74 loc) · 2.62 KB
/
gameservers_count.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
// Copyright 2019 Google LLC 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 metrics
import (
"context"
agonesv1 "agones.dev/agones/pkg/apis/agones/v1"
"go.opencensus.io/stats"
"go.opencensus.io/tag"
"k8s.io/apimachinery/pkg/util/errors"
)
const defaultFleetTag = "none"
// GameServerCount is the count of gameserver per current state and per fleet name
type GameServerCount map[agonesv1.GameServerState]map[fleetKey]int64
type fleetKey struct {
name string
namespace string
}
// increment adds the count of gameservers for a given fleetName and state
func (c GameServerCount) increment(fleetName, fleetNamespace string, state agonesv1.GameServerState) {
key := fleetKey{name: fleetName, namespace: fleetNamespace}
fleets, ok := c[state]
if !ok {
fleets = map[fleetKey]int64{}
c[state] = fleets
}
fleets[key]++
}
// reset sets zero to the whole metrics set
func (c GameServerCount) reset() {
for _, fleets := range c {
for fleet := range fleets {
fleets[fleet] = 0
}
}
}
// record counts the list of gameserver per status and fleet name and record it to OpenCensus
func (c GameServerCount) record(gameservers []*agonesv1.GameServer) error {
// Currently there is no way to remove a metric so we have to reset our values to zero
// so that statuses that have no count anymore are zeroed.
// Otherwise OpenCensus will write the last value recorded to the prom endpoint.
// TL;DR we can't remove a gauge
c.reset()
// counts gameserver per state and fleet
for _, g := range gameservers {
c.increment(g.Labels[agonesv1.FleetNameLabel], g.GetNamespace(), g.Status.State)
}
errs := []error{}
for state, fleets := range c {
for fleet, count := range fleets {
if fleet.name == "" {
fleet.name = noneValue
}
if fleet.namespace == "" {
fleet.namespace = noneValue
}
if err := stats.RecordWithTags(context.Background(), []tag.Mutator{tag.Upsert(keyType, string(state)),
tag.Upsert(keyFleetName, fleet.name), tag.Upsert(keyNamespace, fleet.namespace)}, gameServerCountStats.M(count)); err != nil {
errs = append(errs, err)
}
}
}
return errors.NewAggregate(errs)
}