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Handling iptables() errors more usefully during portmapper setup

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Upstream-commit: 523803d633e3bf7e4076ad41e73daba491da5d40
Component: engine
This commit is contained in:
Shawn Siefkas
2013-03-28 14:44:54 -05:00
parent de000293fa
commit 46acd15bd1
1 changed files with 3 additions and 3 deletions
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6
components/engine/network.go
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@ -124,13 +124,13 @@ func (mapper *PortMapper) cleanup() error {
func (mapper *PortMapper) setup() error {
if err := iptables("-t", "nat", "-N", "DOCKER"); err != nil {
return errors.New("Unable to setup port networking: Failed to create DOCKER chain")
return fmt.Errorf("Failed to create DOCKER chain: %s", err)
}
if err := iptables("-t", "nat", "-A", "PREROUTING", "-j", "DOCKER"); err != nil {
return errors.New("Unable to setup port networking: Failed to inject docker in PREROUTING chain")
return fmt.Errorf("Failed to inject docker in PREROUTING chain: %s", err)
}
if err := iptables("-t", "nat", "-A", "OUTPUT", "-j", "DOCKER"); err != nil {
return errors.New("Unable to setup port networking: Failed to inject docker in OUTPUT chain")
return fmt.Errorf("Failed to inject docker in OUTPUT chain: %s", err)
}
return nil
}