Refactor state

config/types.go

@@ -149,6 +149,7 @@ type StateConfig struct {
 	Directory  string   `yaml:"directory,omitempty"`
 	FsType     string   `yaml:"fstype,omitempty"`
 	Dev        string   `yaml:"dev,omitempty"`
+	Wait       bool     `yaml:"wait,omitempty"`
 	Required   bool     `yaml:"required,omitempty"`
 	Autoformat []string `yaml:"autoformat,omitempty"`
 	FormatZero bool     `yaml:"formatzero,omitempty"`

images/02-autoformat/auto-format.sh

@@ -24,9 +24,9 @@ for dev in ${DEVS[@]}; do
             continue
         fi
 
-        mkfs.ext4 -L RANCHER_STATE ${dev}
 
         if [ -e "/userdata.tar" ]; then
+            mkfs.ext4 -L B2D_STATE ${dev}
             mkdir -p /mnt/new-root
             mount -t ext4 ${dev} /mnt/new-root
             pushd /mnt/new-root
@@ -59,6 +59,8 @@ users:
 EOF
             popd
             umount /mnt/new-root
+        else
+            mkfs.ext4 -L RANCHER_STATE ${dev}
         fi
 
         # do not check another device

images/02-udev/udev.sh

@@ -8,11 +8,26 @@ udevd --daemon
 udevadm trigger --action=add
 udevadm settle
 
-if [ "$BOOTSTRAP" = true ]; then
+dev=$(ros config get rancher.state.dev)
-    # This was needed to get USB devices to fully register
+wait=$(ros config get rancher.state.wait)
-    # There is probably a better way to do this
+if [ "$BOOTSTRAP" != true ] || [ "$dev" == "" ] || [ "$wait" != "true" ]; then
-    killall udevd
+    exit
-    udevd --daemon
-    udevadm trigger --action=add
-    udevadm settle
 fi
+
+for i in `seq 1 30`; do
+    drive=$(ros dev $dev)
+    if [ "$drive" != "" ]; then
+        break
+    fi
+    sleep 1
+done
+drive=$(ros dev $dev)
+if [ "$drive" = "" ]; then
+    exit
+fi
+for i in `seq 1 30`; do
+    if [ -e $drive ]; then
+        break
+    fi
+    sleep 1
+done

init/init.go

@@ -19,7 +19,8 @@ import (
 )
 
 const (
-	STATE string = "/state"
+	STATE             string = "/state"
+	BOOT2DOCKER_MAGIC string = "boot2docker, please format-me"
 
 	TMPFS_MAGIC int64 = 0x01021994
 	RAMFS_MAGIC int64 = 0x858458f6
@@ -143,18 +144,21 @@ func tryMountState(cfg *config.CloudConfig) error {
 }
 
 func tryMountAndBootstrap(cfg *config.CloudConfig) (*config.CloudConfig, error) {
-	if isInitrd() {
+	if !isInitrd() || cfg.Rancher.State.Dev == "" {
-		if err := tryMountState(cfg); !cfg.Rancher.State.Required && err != nil {
+		return cfg, 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
-		}
 	}
+
+	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
+	}
+
 	return mountOem(cfg)
 }
 
@@ -213,6 +217,7 @@ func RunInit() error {
 		log.Debug("Booting off a persistent filesystem")
 	}
 
+	boot2DockerEnvironment := false
 	initFuncs := []config.CfgFunc{
 		func(c *config.CloudConfig) (*config.CloudConfig, error) {
 			return c, dockerlaunch.PrepareFs(&mountConfig)
@@ -233,8 +238,44 @@ func RunInit() error {
 			return cfg, nil
 		},
 		loadModules,
+		func(cfg *config.CloudConfig) (*config.CloudConfig, error) {
+			if util.ResolveDevice("LABEL=B2D_STATE") != "" {
+				boot2DockerEnvironment = true
+				cfg.Rancher.State.Dev = "LABEL=B2D_STATE"
+				return cfg, nil
+			}
+
+			devices := []string{"/dev/sda", "/dev/vda"}
+			data := make([]byte, len(BOOT2DOCKER_MAGIC))
+
+			for _, device := range devices {
+				f, err := os.Open(device)
+				if err == nil {
+					defer f.Close()
+
+					_, err = f.Read(data)
+					if err == nil && string(data) == BOOT2DOCKER_MAGIC {
+						boot2DockerEnvironment = true
+						cfg.Rancher.State.Dev = "LABEL=B2D_STATE"
+						cfg.Rancher.State.Autoformat = []string{device}
+						break
+					}
+				}
+			}
+
+			return cfg, nil
+		},
 		tryMountAndBootstrap,
-		func(_ *config.CloudConfig) (*config.CloudConfig, error) {
+		func(cfg *config.CloudConfig) (*config.CloudConfig, error) {
+			if boot2DockerEnvironment {
+				if err := config.Set("rancher.state.dev", cfg.Rancher.State.Dev); err != nil {
+					log.Errorf("Failed to update rancher.state.dev: %v", err)
+				}
+				if err := config.Set("rancher.state.autoformat", cfg.Rancher.State.Autoformat); err != nil {
+					log.Errorf("Failed to update rancher.state.autoformat: %v", err)
+				}
+			}
+
 			return config.LoadConfig(), nil
 		},
 		loadModules,

os-config.tpl.yml

@@ -39,6 +39,7 @@ rancher:
       - /dev:/host/dev
       - /lib/modules:/lib/modules
       - /lib/firmware:/lib/firmware
+      - /usr/bin/ros:/usr/bin/ros:ro
   autoformat:
     autoformat:
       image: {{.OS_REPO}}/os-autoformat:{{.VERSION}}{{.SUFFIX}}
@@ -74,7 +75,6 @@ rancher:
       url: {{.OS_SERVICES_REPO}}/{{.REPO_VERSION}}
   state:
     fstype: auto
-    dev: LABEL=RANCHER_STATE
     oem_fstype: auto
     oem_dev: LABEL=RANCHER_OEM
   services:

scripts/installer/lay-down-os

@@ -85,7 +85,7 @@ set timeout="1"
 
 menuentry "RancherOS-current" {
   set root=(hd0,msdos1)
-  linux /boot/vmlinuz-${VERSION}-rancheros ${append_line} console=${CONSOLE}
+  linux /boot/vmlinuz-${VERSION}-rancheros ${append_line} rancher.state.dev=LABEL=RANCHER_STATE rancher.state.wait console=${CONSOLE}
   initrd /boot/initrd-${VERSION}-rancheros
 }
 
@@ -96,7 +96,7 @@ if [ ! -z ${ROLLBACK_VERSION} ]; then
 cat >>${grub_cfg} <<EOF
 menuentry "RancherOS-rollback" {
   set root=(hd0,msdos1)
-  linux /boot/vmlinuz-${ROLLBACK_VERSION}-rancheros ${append_line} console=${CONSOLE}
+  linux /boot/vmlinuz-${ROLLBACK_VERSION}-rancheros ${append_line} rancher.state.dev=LABEL=RANCHER_STATE rancher.state.wait console=${CONSOLE}
   initrd /boot/initrd-${ROLLBACK_VERSION}-rancheros
 }
 EOF
@@ -123,7 +123,7 @@ hiddenmenu
 
 title RancherOS ${VERSION}-(current)
 root (hd0)
-kernel /boot/vmlinuz-${VERSION}-rancheros ${append_line} console=${CONSOLE}
+kernel /boot/vmlinuz-${VERSION}-rancheros ${append_line} rancher.state.dev=LABEL=RANCHER_STATE rancher.state.wait console=${CONSOLE}
 initrd /boot/initrd-${VERSION}-rancheros
 
 EOF
@@ -133,7 +133,7 @@ if [ ! -z ${ROLLBACK_VERSION} ]; then
 cat >> ${grub_file}<<EOF
 title RancherOS ${ROLLBACK_VERSION}-(rollback)
 root (hd0)
-kernel /boot/vmlinuz-${ROLLBACK_VERSION}-rancheros ${append_line} console=${CONSOLE}
+kernel /boot/vmlinuz-${ROLLBACK_VERSION}-rancheros ${append_line} rancher.state.dev=LABEL=RANCHER_STATE rancher.state.wait console=${CONSOLE}
 initrd /boot/initrd-${ROLLBACK_VERSION}-rancheros
 EOF
 fi

scripts/isolinux.cfg

@@ -2,4 +2,4 @@ default rancheros
 label rancheros
     kernel /boot/vmlinuz
     initrd /boot/initrd
-    append quiet rancher.password=rancher rancher.state.autoformat=[/dev/sda,/dev/vda]
+    append quiet rancher.password=rancher

scripts/run

@@ -122,7 +122,7 @@ fi
 
 KERNEL_ARGS="quiet rancher.password=rancher console=${TTYCONS} ${QEMU_APPEND}"
 if [ "$FORMAT" == "1" ]; then
-    KERNEL_ARGS="${KERNEL_ARGS} rancher.state.formatzero=true rancher.state.autoformat=[/dev/sda,/dev/vda]"
+    KERNEL_ARGS="${KERNEL_ARGS} rancher.state.dev=LABEL=RANCHER_STATE rancher.state.formatzero=true rancher.state.autoformat=[/dev/sda,/dev/vda]"
 fi
 if [ "$RM_USR" == "1" ]; then
     KERNEL_ARGS="${KERNEL_ARGS} rancher.rm_usr"