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Limit the logging from kubelet attempting to read its manifest URL.

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Without this, it logs an error every 20 seconds if nothing is at the
provided URL.
This commit is contained in:
Alex Robinson 2015-07-30 17:03:46 +00:00
parent cf011cad55
commit a9f0c4683f
2 changed files with 23 additions and 10 deletions
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25
pkg/kubelet/config/http.go
View File

@ -32,11 +32,12 @@ import (
)
type sourceURL struct {
url string
header http.Header
nodeName string
updates chan<- interface{}
data []byte
url string
header http.Header
nodeName string
updates chan<- interface{}
data []byte
failureLogs int
}
func NewSourceURL(url string, header http.Header, nodeName string, period time.Duration, updates chan<- interface{}) {
@ -53,7 +54,19 @@ func NewSourceURL(url string, header http.Header, nodeName string, period time.D
func (s *sourceURL) run() {
if err := s.extractFromURL(); err != nil {
glog.Errorf("Failed to read URL: %v", err)
// Don't log this multiple times per minute. The first few entries should be
// enough to get the point across.
if s.failureLogs < 3 {
glog.Warningf("Failed to read pods from URL: %v", err)
} else if s.failureLogs == 3 {
glog.Warningf("Failed to read pods from URL. Won't log this message anymore: %v", err)
}
s.failureLogs++
} else {
if s.failureLogs > 0 {
glog.Info("Successfully read pods from URL.")
s.failureLogs = 0
}
}
}

8
pkg/kubelet/config/http_test.go
View File

@ -44,7 +44,7 @@ func TestURLErrorNotExistNoUpdate(t *testing.T) {
func TestExtractFromHttpBadness(t *testing.T) {
ch := make(chan interface{}, 1)
c := sourceURL{"http://localhost:49575/_not_found_", http.Header{}, "other", ch, nil}
c := sourceURL{"http://localhost:49575/_not_found_", http.Header{}, "other", ch, nil, 0}
if err := c.extractFromURL(); err == nil {
t.Errorf("Expected error")
}
@ -113,7 +113,7 @@ func TestExtractInvalidPods(t *testing.T) {
testServer := httptest.NewServer(&fakeHandler)
defer testServer.Close()
ch := make(chan interface{}, 1)
c := sourceURL{testServer.URL, http.Header{}, "localhost", ch, nil}
c := sourceURL{testServer.URL, http.Header{}, "localhost", ch, nil, 0}
if err := c.extractFromURL(); err == nil {
t.Errorf("%s: Expected error", testCase.desc)
}
@ -260,7 +260,7 @@ func TestExtractPodsFromHTTP(t *testing.T) {
testServer := httptest.NewServer(&fakeHandler)
defer testServer.Close()
ch := make(chan interface{}, 1)
c := sourceURL{testServer.URL, http.Header{}, hostname, ch, nil}
c := sourceURL{testServer.URL, http.Header{}, hostname, ch, nil, 0}
if err := c.extractFromURL(); err != nil {
t.Errorf("%s: Unexpected error: %v", testCase.desc, err)
continue
@ -307,7 +307,7 @@ func TestURLWithHeader(t *testing.T) {
ch := make(chan interface{}, 1)
header := make(http.Header)
header.Set("Metadata-Flavor", "Google")
c := sourceURL{testServer.URL, header, "localhost", ch, nil}
c := sourceURL{testServer.URL, header, "localhost", ch, nil, 0}
if err := c.extractFromURL(); err != nil {
t.Fatalf("Unexpected error extracting from URL: %v", err)
}