36 lines
916 B
Go
36 lines
916 B
Go
package checks
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import (
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"errors"
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"github.com/docker/distribution/health"
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"net/http"
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"os"
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)
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// FileChecker checks the existence of a file and returns and error
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// if the file exists, taking the application out of rotation
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func FileChecker(f string) health.Checker {
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return health.CheckFunc(func() error {
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if _, err := os.Stat(f); err == nil {
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return errors.New("file exists")
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}
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return nil
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})
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}
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// HTTPChecker does a HEAD request and verifies if the HTTP status
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// code return is a 200, taking the application out of rotation if
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// otherwise
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func HTTPChecker(r string) health.Checker {
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return health.CheckFunc(func() error {
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response, err := http.Head(r)
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if err != nil {
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return errors.New("error while checking: " + r)
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}
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if response.StatusCode != http.StatusOK {
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return errors.New("downstream service returned unexpected status: " + string(response.StatusCode))
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}
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return nil
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})
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}
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