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Merge pull request #1151 from bryan-cox/HOSTEDCP-1872
HOSTEDCP-2031: Use Client Certificate Authentication for ARO HCP deployments
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,65 @@ | ||
package filewatcher | ||
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import ( | ||
"os" | ||
"path/filepath" | ||
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"github.com/fsnotify/fsnotify" | ||
logf "github.com/openshift/cluster-ingress-operator/pkg/log" | ||
) | ||
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var log = logf.Logger.WithName("filewatcher") | ||
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// WatchFileForChanges watches the file, fileToWatch, for changes. If the file contents have changed, the pod this | ||
// function is running on will be restarted. | ||
func WatchFileForChanges(fileToWatch string) error { | ||
log.Info("Starting the file change watcher") | ||
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// Update the file path to watch in case this is a symlink | ||
fileToWatch, err := filepath.EvalSymlinks(fileToWatch) | ||
if err != nil { | ||
return err | ||
} | ||
log.Info("Watching file", "file", fileToWatch) | ||
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// Start the file watcher to monitor file changes | ||
go func() { | ||
if err := checkForFileChanges(fileToWatch); err != nil { | ||
log.Error(err, "Error checking for file changes") | ||
} | ||
}() | ||
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return nil | ||
} | ||
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// checkForFileChanges starts a new file watcher. If the file is changed, the pod running this function will exit. | ||
func checkForFileChanges(path string) error { | ||
watcher, err := fsnotify.NewWatcher() | ||
if err != nil { | ||
return err | ||
} | ||
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go func() { | ||
for { | ||
select { | ||
case event, ok := <-watcher.Events: | ||
if ok && (event.Has(fsnotify.Write) || event.Has(fsnotify.Chmod) || event.Has(fsnotify.Remove)) { | ||
log.Info("file was modified, exiting...", "file", event.Name) | ||
os.Exit(0) | ||
} | ||
case err, ok := <-watcher.Errors: | ||
if ok { | ||
log.Error(err, "file watcher error") | ||
} else { | ||
log.Error(err, "failed to retrieve watcher error") | ||
} | ||
} | ||
} | ||
}() | ||
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if err = watcher.Add(path); err != nil { | ||
return err | ||
} | ||
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return nil | ||
} |