/
healthcheck.go
66 lines (57 loc) · 2.46 KB
/
healthcheck.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
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 types
// FailureType is the type of a failure
type FailureType string
// Failure types
const (
FailureNetwork FailureType = "Network"
FailurePassive FailureType = "Passive"
FailureActive FailureType = "Active"
)
// HealthCheckCb is the health check's callback function
type HealthCheckCb func(host Host, changedState bool, isHealthy bool)
// HealthCheckCb is the health check's callback function
type HealthCheckLog interface {
Log(host Host, changedState bool, isHealthy bool)
}
// HealthChecker is a framework for connection management
// When NewCluster is called, and the config contains health check related, mosn will create
// a cluster with health check to make sure load balance always choose the "good" host
type HealthChecker interface {
// Start makes health checker running
Start()
// Stop terminates health checker
Stop()
// AddHostCheckCompleteCb adds a new callback for health check
AddHostCheckCompleteCb(cb HealthCheckCb)
// SetHealthCheckerHostSet reset the health checker's hostset
SetHealthCheckerHostSet(HostSet)
}
// HealthCheckSession is an interface for health check logic
// The health checker framework support register different session for different protocol.
// The default session implementation is tcp dial, for all non-registered protocol.
type HealthCheckSession interface {
// CheckHealth returns true if session checks the server is ok, or returns false
CheckHealth() bool
// OnTimeout is called when a check health does not return after timeout duration
OnTimeout()
}
// HealthCheckSessionFactory creates a HealthCheckSession
type HealthCheckSessionFactory interface {
NewSession(cfg map[string]interface{}, host Host) HealthCheckSession
}