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optimize code to clarify logic

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Signed-off-by: Ma Shimiao <mashimiao.fnst@cn.fujitsu.com>
This commit is contained in:
Ma Shimiao 2015-04-16 14:31:52 +08:00
parent 1899b2f41a
commit 93cdb0071b
2 changed files with 33 additions and 25 deletions
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31
daemon/create.go
View file

@ -2,7 +2,6 @@ package daemon
import (
"fmt"
"strings"
"github.com/docker/docker/graph"
"github.com/docker/docker/image"
@ -12,27 +11,9 @@ import (
)
func (daemon *Daemon) ContainerCreate(name string, config *runconfig.Config, hostConfig *runconfig.HostConfig) (string, []string, error) {
var warnings []string
if hostConfig.LxcConf.Len() > 0 && !strings.Contains(daemon.ExecutionDriver().Name(), "lxc") {
return "", warnings, fmt.Errorf("Cannot use --lxc-conf with execdriver: %s", daemon.ExecutionDriver().Name())
}
if hostConfig.Memory != 0 && hostConfig.Memory < 4194304 {
return "", warnings, fmt.Errorf("Minimum memory limit allowed is 4MB")
}
if hostConfig.Memory > 0 && !daemon.SystemConfig().MemoryLimit {
warnings = append(warnings, "Your kernel does not support memory limit capabilities. Limitation discarded.\n")
hostConfig.Memory = 0
}
if hostConfig.Memory > 0 && hostConfig.MemorySwap != -1 && !daemon.SystemConfig().SwapLimit {
warnings = append(warnings, "Your kernel does not support swap limit capabilities. Limitation discarded.\n")
hostConfig.MemorySwap = -1
}
if hostConfig.Memory > 0 && hostConfig.MemorySwap > 0 && hostConfig.MemorySwap < hostConfig.Memory {
return "", warnings, fmt.Errorf("Minimum memoryswap limit should be larger than memory limit, see usage.\n")
}
if hostConfig.Memory == 0 && hostConfig.MemorySwap > 0 {
return "", warnings, fmt.Errorf("You should always set the Memory limit when using Memoryswap limit, see usage.\n")
warnings, err := daemon.verifyHostConfig(hostConfig)
if err != nil {
return "", warnings, err
}
container, buildWarnings, err := daemon.Create(config, hostConfig, name)
@ -46,9 +27,6 @@ func (daemon *Daemon) ContainerCreate(name string, config *runconfig.Config, hos
}
return "", warnings, err
}
if !container.Config.NetworkDisabled && daemon.SystemConfig().IPv4ForwardingDisabled {
warnings = append(warnings, "IPv4 forwarding is disabled.\n")
}
container.LogEvent("create")
warnings = append(warnings, buildWarnings...)
@ -80,6 +58,9 @@ func (daemon *Daemon) Create(config *runconfig.Config, hostConfig *runconfig.Hos
if warnings, err = daemon.mergeAndVerifyConfig(config, img); err != nil {
return nil, nil, err
}
if !config.NetworkDisabled && daemon.SystemConfig().IPv4ForwardingDisabled {
warnings = append(warnings, "IPv4 forwarding is disabled.\n")
}
if hostConfig == nil {
hostConfig = &runconfig.HostConfig{}
}

27
daemon/daemon.go
View file

@ -1224,3 +1224,30 @@ func checkKernel() error {
}
return nil
}
func (daemon *Daemon) verifyHostConfig(hostConfig *runconfig.HostConfig) ([]string, error) {
var warnings []string
if hostConfig.LxcConf.Len() > 0 && !strings.Contains(daemon.ExecutionDriver().Name(), "lxc") {
return warnings, fmt.Errorf("Cannot use --lxc-conf with execdriver: %s", daemon.ExecutionDriver().Name())
}
if hostConfig.Memory != 0 && hostConfig.Memory < 4194304 {
return warnings, fmt.Errorf("Minimum memory limit allowed is 4MB")
}
if hostConfig.Memory > 0 && !daemon.SystemConfig().MemoryLimit {
warnings = append(warnings, "Your kernel does not support memory limit capabilities. Limitation discarded.\n")
hostConfig.Memory = 0
}
if hostConfig.Memory > 0 && hostConfig.MemorySwap != -1 && !daemon.SystemConfig().SwapLimit {
warnings = append(warnings, "Your kernel does not support swap limit capabilities. Limitation discarded.\n")
hostConfig.MemorySwap = -1
}
if hostConfig.Memory > 0 && hostConfig.MemorySwap > 0 && hostConfig.MemorySwap < hostConfig.Memory {
return warnings, fmt.Errorf("Minimum memoryswap limit should be larger than memory limit, see usage.\n")
}
if hostConfig.Memory == 0 && hostConfig.MemorySwap > 0 {
return warnings, fmt.Errorf("You should always set the Memory limit when using Memoryswap limit, see usage.\n")
}
return warnings, nil
}