Implement 'mos boot'

This starts all services.

Closes #7

Signed-off-by: Serge Hallyn <[email protected]>

cmd/mosctl/boot.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"github.com/pkg/errors"
+	"github.com/project-machine/mos/pkg/mosconfig"
+	"github.com/urfave/cli"
+)
+
+var bootCmd = cli.Command{
+	Name:   "boot",
+	Usage:  "start all services listed in mos manifest",
+	Action: doBootCmd,
+}
+
+func doBootCmd(ctx *cli.Context) error {
+	opts := mosconfig.DefaultMosOptions()
+	mos, err := mosconfig.OpenMos(opts)
+	if err != nil {
+		return errors.Wrapf(err, "Failed opening mos")
+	}
+
+	err = mos.Boot()
+	if err != nil {
+		return errors.Wrapf(err, "Failed to boot")
+	}
+
+	return nil
+}

cmd/mosctl/main.go

@@ -17,6 +17,7 @@ func main() {
 	app.Commands = []cli.Command{
 		createBootFsCmd,
 		activateCmd,
+		bootCmd,
 		installCmd,
 		mountCmd,
 		updateCmd,

layers/install/mos-boot-setup.service

@@ -0,0 +1,18 @@
+[Unit]
+Description=mos-boot-setup
+After=local-fs.target
+After=systemd-journal-flush.service logs.mount
+Requires=local-fs.target
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/bin/mosctl boot
+StandardOutput=journal+console
+StandardError=journal+console
+
+# Journal namespaces implementation also affects the mount namespaces.
+# Assigning a separate journal namespace to Atomix process hides mount points 
+# like /config and /tmp from the "main" user namespace.
+# LogNamespace=atomix
+[Install]
+WantedBy=multi-user.target

layers/install/stacker.yaml

@@ -62,6 +62,7 @@ demo-target-rootfs:
     - ../provision/console-helper
     - load-mos-modules
     - mos-modules.service
+    - mos-boot-setup.service
   run: |
     #!/bin/sh -ex
     writefile() {
@@ -95,6 +96,8 @@ demo-target-rootfs:
     chmod 755 /usr/bin/load-mos-modules
     cp /stacker/imports/mos-modules.service /etc/systemd/system/
     systemctl enable mos-modules.service
+    cp /stacker/imports/mos-boot-setup.service /etc/systemd/system
+    systemctl enable mos-boot-setup.service
 
     echo root:passw0rd | chpasswd
     systemctl enable serial-getty@ttyS0

pkg/mosconfig/mos.go

@@ -169,6 +169,27 @@ func (mos *Mos) Current(name string) (*Target, error) {
 	return nil, errors.Errorf("Target %s not found", name)
 }
 
+// We'll probably want to do a lot more setup here, but for now just
+// activate services
+func (mos *Mos) Boot() error {
+	return mos.ActivateAll()
+}
+
+// Activate all services
+func (mos *Mos) ActivateAll() error {
+	m, err := mos.CurrentManifest()
+	if err != nil {
+		return errors.Wrapf(err, "Failed opening manifest")
+	}
+	for _, t := range m.SysTargets {
+		if err := mos.Activate(t.Name); err != nil {
+			return errors.Wrapf(err, "Failed starting %s", t.Name)
+		}
+	}
+
+	return nil
+}
+
 // Activate a target (service):
 // If it is not yet running then start it.
 // If it is already running, but is not at the newest version (i.e. after an