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Multi-arch build

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Currently, for amd64 (the default) and arm.
Run `dapper make ARCH=arm rootfs` to build rootfs.tar.gz for arm.
This commit is contained in:
Ivan Mikushin
2016-01-15 18:18:30 +05:00
parent 3a0aebe738
commit 2f27271a2c
18 changed files with 531 additions and 73 deletions
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37
init/init.go
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@@ -8,6 +8,7 @@ import (
"os"
"os/exec"
"strings"
"syscall"
log "github.com/Sirupsen/logrus"
"github.com/rancher/docker-from-scratch"
@@ -17,6 +18,9 @@ import (
const (
STATE string = "/state"
TMPFS_MAGIC int64 = 0x01021994
RAMFS_MAGIC int64 = 0x858458f6
)
var (
@@ -140,15 +144,17 @@ func tryMountState(cfg *config.CloudConfig) error {
}
func tryMountAndBootstrap(cfg *config.CloudConfig) (*config.CloudConfig, error) {
if err := tryMountState(cfg); !cfg.Rancher.State.Required && err != nil {
return cfg, nil
} else if err != nil {
return cfg, err
}
if isInitrd() {
if err := tryMountState(cfg); !cfg.Rancher.State.Required && err != nil {
return cfg, nil
} else if err != nil {
return cfg, err
}
log.Debugf("Switching to new root at %s %s", STATE, cfg.Rancher.State.Directory)
if err := switchRoot(STATE, cfg.Rancher.State.Directory, cfg.Rancher.RmUsr); err != nil {
return cfg, err
log.Debugf("Switching to new root at %s %s", STATE, cfg.Rancher.State.Directory)
if err := switchRoot(STATE, cfg.Rancher.State.Directory, cfg.Rancher.RmUsr); err != nil {
return cfg, err
}
}
return mountOem(cfg)
}
@@ -170,10 +176,21 @@ func getLaunchConfig(cfg *config.CloudConfig, dockerCfg *config.DockerConfig) (*
return &launchConfig, args
}
func isInitrd() bool {
var stat syscall.Statfs_t
syscall.Statfs("/", &stat)
return int64(stat.Type) == TMPFS_MAGIC || int64(stat.Type) == RAMFS_MAGIC
}
func RunInit() error {
os.Setenv("PATH", "/sbin:/usr/sbin:/usr/bin")
// Magic setting to tell Docker to do switch_root and not pivot_root
os.Setenv("DOCKER_RAMDISK", "true")
if isInitrd() {
log.Debug("Booting off an in-memory filesystem")
// Magic setting to tell Docker to do switch_root and not pivot_root
os.Setenv("DOCKER_RAMDISK", "true")
} else {
log.Debug("Booting off a persistent filesystem")
}
initFuncs := []config.CfgFunc{
func(c *config.CloudConfig) (*config.CloudConfig, error) {