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healthcheck.go
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healthcheck.go
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/*
* Copyright (c) 2017, MegaEase
* 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 proxies
import "time"
// HealthCheckSpec is the spec for health check.
type HealthCheckSpec struct {
// Interval is the interval duration for health check.
Interval string `json:"interval,omitempty" jsonschema:"format=duration"`
// Timeout is the timeout duration for health check, default is 3.
Timeout string `json:"timeout,omitempty" jsonschema:"format=duration"`
// Fails is the consecutive fails count for assert fail, default is 1.
Fails int `json:"fails,omitempty" jsonschema:"minimum=1"`
// Passes is the consecutive passes count for assert pass, default is 1.
Passes int `json:"passes,omitempty" jsonschema:"minimum=1"`
// Deprecated: other fields in this struct are general, but this field is
// specific to HTTP health check. It should be moved to HTTP health check.
// In HTTP health check, we should use URI instead of path.
Path string `json:"path,omitempty"`
}
// GetTimeout returns the timeout duration.
func (s *HealthCheckSpec) GetTimeout() time.Duration {
timeout, _ := time.ParseDuration(s.Timeout)
if timeout <= 0 {
timeout = 3 * time.Second
}
return timeout
}
// GetInterval returns the interval duration.
func (s *HealthCheckSpec) GetInterval() time.Duration {
interval, _ := time.ParseDuration(s.Interval)
if interval <= 0 {
interval = time.Minute
}
return interval
}
// HealthChecker checks whether a server is healthy or not.
type HealthChecker interface {
BaseSpec() HealthCheckSpec
Check(svr *Server) bool
Close()
}