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Engine: centralize checks for supported architectures and kernel versions

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This commit is contained in:
Solomon Hykes 2013-10-23 06:53:40 +00:00
parent 2a29bf6245
commit 1b8eef4efb
3 changed files with 21 additions and 11 deletions
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21
engine/engine.go
View file

@ -3,6 +3,9 @@ package engine
import (
"fmt"
"os"
"log"
"runtime"
"github.com/dotcloud/docker/utils"
)
@ -31,6 +34,24 @@ type Engine struct {
// Changing the contents of the root without executing a job will cause unspecified
// behavior.
func New(root string) (*Engine, error) {
// Check for unsupported architectures
if runtime.GOARCH != "amd64" {
return nil, fmt.Errorf("The docker runtime currently only supports amd64 (not %s). This will change in the future. Aborting.", runtime.GOARCH)
}
// Check for unsupported kernel versions
// FIXME: it would be cleaner to not test for specific versions, but rather
// test for specific functionalities.
// Unfortunately we can't test for the feature "does not cause a kernel panic"
// without actually causing a kernel panic, so we need this workaround until
// the circumstances of pre-3.8 crashes are clearer.
// For details see http://github.com/dotcloud/docker/issues/407
if k, err := utils.GetKernelVersion(); err != nil {
log.Printf("WARNING: %s\n", err)
} else {
if utils.CompareKernelVersion(k, &utils.KernelVersionInfo{Kernel: 3, Major: 8, Minor: 0}) < 0 {
log.Printf("WARNING: You are running linux kernel version %s, which might be unstable running docker. Please upgrade your kernel to 3.8.0.", k.String())
}
}
if err := os.MkdirAll(root, 0700); err != nil && !os.IsExist(err) {
return nil, err
}

8
runtime.go
View file

@ -577,14 +577,6 @@ func NewRuntime(config *DaemonConfig) (*Runtime, error) {
if err != nil {
return nil, err
}
if k, err := utils.GetKernelVersion(); err != nil {
log.Printf("WARNING: %s\n", err)
} else {
if utils.CompareKernelVersion(k, &utils.KernelVersionInfo{Kernel: 3, Major: 8, Minor: 0}) < 0 {
log.Printf("WARNING: You are running linux kernel version %s, which might be unstable running docker. Please upgrade your kernel to 3.8.0.", k.String())
}
}
runtime.UpdateCapabilities(false)
return runtime, nil
}

3
server.go
View file

@ -1430,9 +1430,6 @@ func (srv *Server) ContainerCopy(name string, resource string, out io.Writer) er
}
func NewServer(config *DaemonConfig) (*Server, error) {
if runtime.GOARCH != "amd64" {
log.Fatalf("The docker runtime currently only supports amd64 (not %s). This will change in the future. Aborting.", runtime.GOARCH)
}
runtime, err := NewRuntime(config)
if err != nil {
return nil, err