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letsencrypt: Basic renewal failover and better error handling

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This commit is contained in:
Matthew Holt 2015-10-21 21:28:33 -06:00
parent c5635f21a3
commit f24ecee603
1 changed files with 30 additions and 19 deletions
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49
config/letsencrypt/renew.go
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@ -17,8 +17,10 @@ import (
func keepCertificatesRenewed(configs []server.Config) {
ticker := time.Tick(renewInterval)
for range ticker {
if err := processCertificateRenewal(configs); err != nil {
log.Printf("[ERROR] cert renewal: %v", err)
if errs := processCertificateRenewal(configs); len(errs) > 0 {
for _, err := range errs {
log.Printf("[ERROR] cert renewal: %v\n", err)
}
}
}
}
@ -26,11 +28,12 @@ func keepCertificatesRenewed(configs []server.Config) {
// checkCertificateRenewal loops through all configured
// sites and looks for certificates to renew. Nothing is mutated
// through this function. The changes happen directly on disk.
func processCertificateRenewal(configs []server.Config) error {
func processCertificateRenewal(configs []server.Config) []error {
var errs []error
log.Print("[INFO] Processing certificate renewals...")
for _, cfg := range configs {
// Check if this entry is TLS enabled and managed by LE
// Host must be TLS-enabled and have assets managed by LE
if !cfg.TLS.Enabled || !existingCertAndKey(cfg.Host) {
continue
}
@ -38,11 +41,13 @@ func processCertificateRenewal(configs []server.Config) error {
// Read the certificate and get the NotAfter time.
certBytes, err := ioutil.ReadFile(storage.SiteCertFile(cfg.Host))
if err != nil {
return err
errs = append(errs, err)
continue // still have to check other certificates
}
expTime, err := acme.GetPEMCertExpiration(certBytes)
if err != nil {
return err
errs = append(errs, err)
continue
}
// The time returned from the certificate is always in UTC.
@ -50,23 +55,26 @@ func processCertificateRenewal(configs []server.Config) error {
// Directly convert it to days for the following checks.
daysLeft := int(expTime.Sub(time.Now().UTC()).Hours() / 24)
// Renew on two or less days remaining.
if daysLeft <= 2 {
log.Printf("[WARN] There are %d days left on the certificate of %s. Trying to renew now.", daysLeft, cfg.Host)
// Renew with a week or less remaining.
if daysLeft <= 7 {
log.Printf("[INFO] There are %d days left on the certificate of %s. Trying to renew now.", daysLeft, cfg.Host)
client, err := newClient(getEmail(cfg))
if err != nil {
return err
errs = append(errs, err)
continue
}
// Read metadata
metaBytes, err := ioutil.ReadFile(storage.SiteMetaFile(cfg.Host))
if err != nil {
return err
errs = append(errs, err)
continue
}
privBytes, err := ioutil.ReadFile(storage.SiteKeyFile(cfg.Host))
if err != nil {
return err
errs = append(errs, err)
continue
}
var certMeta acme.CertificateResource
@ -78,17 +86,20 @@ func processCertificateRenewal(configs []server.Config) error {
// TODO: revokeOld should be an option in the caddyfile
newCertMeta, err := client.RenewCertificate(certMeta, true)
if err != nil {
return err
time.Sleep(10 * time.Second)
newCertMeta, err = client.RenewCertificate(certMeta, true)
if err != nil {
errs = append(errs, err)
continue
}
}
saveCertsAndKeys([]acme.CertificateResource{newCertMeta})
}
// Warn on 14 days remaining
if daysLeft <= 14 {
log.Printf("[WARN] There are %d days left on the certificate of %s. Will renew on two days left.\n", daysLeft, cfg.Host)
} else if daysLeft <= 14 {
// Warn on 14 days remaining
log.Printf("[WARN] There are %d days left on the certificate for %s. Will renew when 7 days remain.\n", daysLeft, cfg.Host)
}
}
return nil
return errs
}