homelab/traefik
1
0
Fork 0
Code Activity

Allow config of additonal CircuitBreaker params

Browse source
This commit is contained in:
Adrian Lai 2022-04-05 11:30:08 +01:00 • committed by GitHub
parent 8c56d1a338
commit 71150bcaaf
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
15 changed files with 218 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

44
pkg/middlewares/circuitbreaker/circuit_breaker.go
View file

@ -3,6 +3,7 @@ package circuitbreaker
import (
"context"
"net/http"
"time"
"github.com/opentracing/opentracing-go/ext"
"github.com/traefik/traefik/v2/pkg/config/dynamic"
@ -12,9 +13,7 @@ import (
"github.com/vulcand/oxy/cbreaker"
)
const (
typeName = "CircuitBreaker"
)
const typeName = "CircuitBreaker"
type circuitBreaker struct {
circuitBreaker *cbreaker.CircuitBreaker
@ -27,9 +26,32 @@ func New(ctx context.Context, next http.Handler, confCircuitBreaker dynamic.Circ
logger := log.FromContext(middlewares.GetLoggerCtx(ctx, name, typeName))
logger.Debug("Creating middleware")
logger.Debug("Setting up with expression: %s", expression)
logger.Debugf("Setting up with expression: %s", expression)
oxyCircuitBreaker, err := cbreaker.New(next, expression, createCircuitBreakerOptions(expression))
cbOpts := []cbreaker.CircuitBreakerOption{
cbreaker.Fallback(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
tracing.SetErrorWithEvent(req, "blocked by circuit-breaker (%q)", expression)
rw.WriteHeader(http.StatusServiceUnavailable)
if _, err := rw.Write([]byte(http.StatusText(http.StatusServiceUnavailable))); err != nil {
log.FromContext(req.Context()).Error(err)
}
})),
}
if confCircuitBreaker.CheckPeriod > 0 {
cbOpts = append(cbOpts, cbreaker.CheckPeriod(time.Duration(confCircuitBreaker.CheckPeriod)))
}
if confCircuitBreaker.FallbackDuration > 0 {
cbOpts = append(cbOpts, cbreaker.FallbackDuration(time.Duration(confCircuitBreaker.FallbackDuration)))
}
if confCircuitBreaker.RecoveryDuration > 0 {
cbOpts = append(cbOpts, cbreaker.RecoveryDuration(time.Duration(confCircuitBreaker.RecoveryDuration)))
}
oxyCircuitBreaker, err := cbreaker.New(next, expression, cbOpts...)
if err != nil {
return nil, err
}
@ -39,18 +61,6 @@ func New(ctx context.Context, next http.Handler, confCircuitBreaker dynamic.Circ
}, nil
}
// NewCircuitBreakerOptions returns a new CircuitBreakerOption.
func createCircuitBreakerOptions(expression string) cbreaker.CircuitBreakerOption {
return cbreaker.Fallback(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
tracing.SetErrorWithEvent(req, "blocked by circuit-breaker (%q)", expression)
rw.WriteHeader(http.StatusServiceUnavailable)
if _, err := rw.Write([]byte(http.StatusText(http.StatusServiceUnavailable))); err != nil {
log.FromContext(req.Context()).Error(err)
}
}))
}
func (c *circuitBreaker) GetTracingInformation() (string, ext.SpanKindEnum) {
return c.name, tracing.SpanKindNoneEnum
}