Add Restful service

cmd/vfkit/main.go

@@ -1,3 +1,4 @@
+//go:build darwin
 // +build darwin
 
 /*
@@ -29,6 +30,7 @@ import (
 	"github.com/Code-Hex/vz/v3"
 	"github.com/crc-org/vfkit/pkg/cmdline"
 	"github.com/crc-org/vfkit/pkg/config"
+	"github.com/crc-org/vfkit/pkg/rest"
 	"github.com/crc-org/vfkit/pkg/vf"
 	"github.com/docker/go-units"
 	log "github.com/sirupsen/logrus"
@@ -110,18 +112,29 @@ func waitForVMState(vm *vz.VirtualMachine, state vz.VirtualMachineState) error {
 	}
 }
 
-func runVirtualMachine(vmConfig *config.VirtualMachine) error {
+func runVFKit(vmConfig *config.VirtualMachine, opts *cmdline.Options) error {
 	vzVMConfig, err := vf.ToVzVirtualMachineConfig(vmConfig)
 	if err != nil {
 		return err
 	}
-
 	vm, err := vz.NewVirtualMachine(vzVMConfig)
 	if err != nil {
 		return err
 	}
 
-	err = vm.Start()
+	// Do not enable the rests server if user sets scheme to None
+	if opts.RestfulURI != cmdline.DefaultRestfulURI {
+		srv, err := rest.NewServer(rest.NewVzVirtualMachine(vm, vzVMConfig), opts.RestfulURI)
+		if err != nil {
+			return err
+		}
+		srv.Start()
+	}
+	return runVirtualMachine(vmConfig, vm)
+}
+
+func runVirtualMachine(vmConfig *config.VirtualMachine, vm *vz.VirtualMachine) error {
+	err := vm.Start()
 	if err != nil {
 		return err
 	}

cmd/vfkit/root.go

@@ -30,7 +30,7 @@ var rootCmd = &cobra.Command{
 		if err != nil {
 			return err
 		}
-		return runVirtualMachine(vmConfig)
+		return runVFKit(vmConfig, opts)
 	},
 	Version: vfkitVersion,
 }

doc/usage.md

@@ -13,6 +13,12 @@ Device configuration is optional, but most VM will need a disk image and a netwo
 
 Set the log-level for VFKit.  Supported values are `debug`, `info`, and `error`.
 
+- `--restful-URI`
+
+The URI (address) of the restful service.  The default is `tcp://localhost:8081`.  Valid schemes are
+`tcp`, `none`, or `unix`.  In the case of unix, the "host" portion would be a path to where the unix domain
+socket will be stored. A scheme of `none` disables the restful service.
+
 ### Virtual Machine Resources
 
 These options specify the amount of RAM and the number of CPUs which will be available to the virtual machine.
@@ -208,3 +214,31 @@ The share can be mounted in the guest with `mount -t virtio-fs vfkitTag /mnt`, w
 #### Example
 `--device virtio-fs,sharedDir=/Users/virtuser/vfkit/,mountTag=vfkit-share`
 
+
+## Restful Service
+
+### Get VM state
+
+Used to obtain the state of the virtual machine that is being run by VFKit.
+
+GET `/vm/state`
+Response: {"state": "string"}
+
+### Change VM State
+
+Change the state of the virtual machine. Valid states are:
+* Hardstop
+* Pause
+* Resume
+* Stop
+
+POST `/vm/state` {"new_state": "new value"}
+
+Response: http 200
+
+### Inspect VM
+
+Get description of the virtual machine
+
+GET `/vm/inspect`
+Response: { "cpus": uint, "memory": uint64, "devices": []config.VirtIODevice }

go.mod

@@ -5,22 +5,42 @@ go 1.17
 require (
 	github.com/Code-Hex/vz/v3 v3.0.4
 	github.com/docker/go-units v0.4.0
+	github.com/gin-gonic/gin v1.9.0
 	github.com/h2non/filetype v1.1.3
 	github.com/prashantgupta24/mac-sleep-notifier v1.0.1
 	github.com/sirupsen/logrus v1.9.0
-	github.com/spf13/cobra v1.6.1
+	github.com/spf13/cobra v1.7.0
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.8.1
-	golang.org/x/sys v0.3.0
+	golang.org/x/sys v0.5.0
 	inet.af/tcpproxy v0.0.0-20220326234310-be3ee21c9fa0
 )
 
 require (
+	github.com/bytedance/sonic v1.8.0 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/inconshreveable/mousetrap v1.0.1 // indirect
-	github.com/kr/pretty v0.2.1 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.11.2 // indirect
+	github.com/goccy/go-json v0.10.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.0.9 // indirect
+	github.com/leodido/go-urn v1.2.1 // indirect
+	github.com/mattn/go-isatty v0.0.17 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.9 // indirect
+	golang.org/x/arch v0.0.0-20210923205945-b76863e36670 // indirect
+	golang.org/x/crypto v0.5.0 // indirect
 	golang.org/x/mod v0.9.0 // indirect
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
+	golang.org/x/net v0.7.0 // indirect
+	golang.org/x/text v0.7.0 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,46 +1,100 @@
 github.com/Code-Hex/vz/v3 v3.0.4 h1:oB74JSjSdIijjHkoYWG5ws7bHpx69m1w3PopFQdjFSc=
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+github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM=
+github.com/bytedance/sonic v1.8.0 h1:ea0Xadu+sHlu7x5O3gKhRpQ1IKiMrSiHttPF0ybECuA=
+github.com/bytedance/sonic v1.8.0/go.mod h1:i736AoUSYt75HyZLoJW9ERYxcy6eaN6h4BZXU064P/U=
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+github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 h1:qSGYFH7+jGhDF8vLC+iwCD4WpbV1EBDSzWkJODFLams=
+github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311/go.mod h1:b583jCggY9gE99b6G5LEC39OIiVsWj+R97kbl5odCEk=
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-github.com/inconshreveable/mousetrap v1.0.1 h1:U3uMjPSQEBMNp1lFxmllqCPM6P5u/Xq7Pgzkat/bFNc=
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-golang.org/x/crypto v0.1.0 h1:MDRAIl0xIo9Io2xV565hzXHw3zVseKrJKodhohM5CjU=
 golang.org/x/crypto v0.1.0/go.mod h1:RecgLatLF4+eUMCP1PoPZQb+cVrJcOPbHkTkbkB9sbw=
+golang.org/x/crypto v0.5.0 h1:U/0M97KRkSFvyD/3FSmdP5W5swImpNgle/EHFhOsQPE=
+golang.org/x/crypto v0.5.0/go.mod h1:NK/OQwhpMQP3MwtdjgLlYHnH9ebylxKWv3e0fK+mkQU=
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 golang.org/x/mod v0.9.0 h1:KENHtAZL2y3NLMYZeHY9DW8HW8V+kQyJsY/V9JlKvCs=
@@ -49,6 +103,9 @@ golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
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+golang.org/x/net v0.5.0/go.mod h1:DivGGAXEgPSlEBzxGzZI+ZLohi+xUj054jfeKui00ws=
+golang.org/x/net v0.7.0 h1:rJrUqqhjsgNp7KqAIc25s9pZnjU7TUcSY7HcVZjdn1g=
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@@ -57,25 +114,41 @@ golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBc
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