homelab/traefik
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fix after review

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This commit is contained in:
Julien Salleyron 2017-01-31 22:55:02 +01:00
parent 99ffc26d40
commit 755822bf14
3 changed files with 28 additions and 23 deletions
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42
healthcheck/healthcheck.go
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@ -2,12 +2,14 @@ package healthcheck
import (
"context"
"github.com/containous/traefik/log"
"github.com/vulcand/oxy/roundrobin"
"net/http"
"net/url"
"sync"
"time"
"github.com/containous/traefik/log"
"github.com/containous/traefik/safe"
"github.com/vulcand/oxy/roundrobin"
)
var singleton *HealthCheck
@ -52,54 +54,56 @@ func NewBackendHealthCheck(URL string, lb loadBalancer) *BackendHealthCheck {
}
//SetBackendsConfiguration set backends configuration
func (hc *HealthCheck) SetBackendsConfiguration(backends map[string]*BackendHealthCheck) {
func (hc *HealthCheck) SetBackendsConfiguration(backends map[string]*BackendHealthCheck, parentCtx context.Context) {
hc.Backends = backends
if hc.cancel != nil {
hc.cancel()
}
ctx, cancel := context.WithCancel(context.Background())
ctx, cancel := context.WithCancel(parentCtx)
hc.cancel = cancel
hc.execute(ctx)
}
func (hc *HealthCheck) execute(ctx context.Context) {
for backendID, backend := range hc.Backends {
go func(backendID string, backend *BackendHealthCheck) {
currentBackend := backend
currentBackendID := backendID
safe.Go(func() {
for {
ticker := time.NewTicker(time.Second * 30)
select {
case <-ctx.Done():
log.Debugf("Refreshing All Healthcheck goroutines")
log.Debugf("Stopping all current Healthcheck goroutines")
return
case <-ticker.C:
log.Debugf("Refreshing Healthcheck for backend %s ", backendID)
enabledURLs := backend.lb.Servers()
log.Debugf("Refreshing Healthcheck for currentBackend %s ", currentBackendID)
enabledURLs := currentBackend.lb.Servers()
var newDisabledURLs []*url.URL
for _, url := range backend.DisabledURLs {
if testHealth(url, backend.URL) {
log.Debugf("Upsert %s", url.String())
backend.lb.UpsertServer(url, roundrobin.Weight(1))
for _, url := range currentBackend.DisabledURLs {
if checkHealth(url, currentBackend.URL) {
log.Debugf("HealthCheck is up [%s]: Upsert in server list", url.String())
currentBackend.lb.UpsertServer(url, roundrobin.Weight(1))
} else {
newDisabledURLs = append(newDisabledURLs, url)
}
}
backend.DisabledURLs = newDisabledURLs
currentBackend.DisabledURLs = newDisabledURLs
for _, url := range enabledURLs {
if !testHealth(url, backend.URL) {
log.Debugf("Remove %s", url.String())
backend.lb.RemoveServer(url)
backend.DisabledURLs = append(backend.DisabledURLs, url)
if !checkHealth(url, currentBackend.URL) {
log.Debugf("HealthCheck has failed [%s]: Remove from server list", url.String())
currentBackend.lb.RemoveServer(url)
currentBackend.DisabledURLs = append(currentBackend.DisabledURLs, url)
}
}
}
}
}(backendID, backend)
})
}
}
func testHealth(serverURL *url.URL, checkURL string) bool {
func checkHealth(serverURL *url.URL, checkURL string) bool {
timeout := time.Duration(5 * time.Second)
client := http.Client{
Timeout: timeout,