Ability to output ls/ps in json format

Let's allow to use --format=json option to display lists
in machine-readable format.

```
$ ./eden volume ls --format=json
[
    {
        "Name": "pedantic_ganguly_0_m_0",
        "UUID": "77a786a5-fc09-4b3d-946c-fbb4d77a72ce",
        "Image": "lfedge/eden-eclient:b1c1de6",
        "VolumeType": "CONTAINER",
        "Size": "82 MB",
        "MaxSize": "-",
        "AdamState": "IN_CONFIG",
        "EveState": "DELIVERED",
        "LastError": "",
        "Ref": "app: pedantic_ganguly",
        "MountPoint": "/",
        "OriginType": "VCOT_DOWNLOAD"
    }
]
```

```
$ ./eden network ls --format=json
[
    {
        "Name": "flamboyant_goldstine",
        "UUID": "c7b73fe8-f2eb-4304-b07a-9f8adcca8178",
        "NetworkType": "ZnetInstLocal",
        "CIDR": "10.11.12.0/24",
        "Stats": "rx:{totalPackets:570 totalBytes:54758} tx:{totalPackets:2260 totalBytes:2607824}",
        "AdamState": "IN_CONFIG",
        "EveState": "ACTIVATED",
        "Activated": true
    }
]
```

```
$ ./eden pod ps --format=json
[
    {
        "Name": "pedantic_ganguly",
        "UUID": "2877759b-5443-4952-b95e-004f244c87ad",
        "Image": "lfedge/eden-eclient:b1c1de6",
        "AdamState": "IN_CONFIG",
        "EVEState": "RUNNING",
        "InternalIP": [
            "10.11.12.2"
        ],
        "ExternalIP": "127.0.0.1",
        "InternalPort": "22",
        "ExternalPort": "8027",
        "MemoryUsed": 181,
        "MemoryAvail": 896,
        "CPUUsage": 0,
        "Macs": [
            "ce:5b:cd:11:50:0f"
        ],
        "Volumes": {
            "77a786a5-fc09-4b3d-946c-fbb4d77a72ce": 100
        }
    }
]
```

Signed-off-by: Petr Fedchenkov <giggsoff@gmail.com>

cmd/edenNetwork.go

@@ -31,16 +31,21 @@ func newNetworkCmd() *cobra.Command {
 }
 
 func newNetworkLsCmd() *cobra.Command {
+	var outputFormat types.OutputFormat
 	//networkLsCmd is a command to list deployed network instances
 	var networkLsCmd = &cobra.Command{
 		Use:   "ls",
 		Short: "List networks",
 		Run: func(cmd *cobra.Command, args []string) {
-			if err := openevec.NetworkLs(); err != nil {
+			if err := openevec.NetworkLs(outputFormat); err != nil {
 				log.Fatal(err)
 			}
 		},
 	}
+	networkLsCmd.Flags().Var(
+		enumflag.New(&outputFormat, "format", outputFormatIds, enumflag.EnumCaseInsensitive),
+		"format",
+		"Format to print logs, supports: lines, json")
 	return networkLsCmd
 }
 

cmd/edenPod.go

@@ -127,15 +127,20 @@ You can set access VLAN ID (VID) for a particular network in the format '<networ
 }
 
 func newPodPsCmd(cfg *openevec.EdenSetupArgs) *cobra.Command {
+	var outputFormat types.OutputFormat
 	var podPsCmd = &cobra.Command{
 		Use:   "ps",
 		Short: "List pods",
 		Run: func(cmd *cobra.Command, args []string) {
-			if err := openevec.PodPs(cfg); err != nil {
+			if err := openevec.PodPs(cfg, outputFormat); err != nil {
 				log.Fatalf("EVE pod deploy failed: %s", err)
 			}
 		},
 	}
+	podPsCmd.Flags().Var(
+		enumflag.New(&outputFormat, "format", outputFormatIds, enumflag.EnumCaseInsensitive),
+		"format",
+		"Format to print logs, supports: lines, json")
 
 	return podPsCmd
 }

cmd/edenVolume.go

@@ -2,9 +2,11 @@ package cmd
 
 import (
 	"github.com/dustin/go-humanize"
+	"github.com/lf-edge/eden/pkg/controller/types"
 	"github.com/lf-edge/eden/pkg/openevec"
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
+	"github.com/thediveo/enumflag"
 )
 
 func newVolumeCmd() *cobra.Command {
@@ -31,16 +33,21 @@ func newVolumeCmd() *cobra.Command {
 }
 
 func newVolumeLsCmd() *cobra.Command {
+	var outputFormat types.OutputFormat
 	//volumeLsCmd is a command to list deployed volumes
 	var volumeLsCmd = &cobra.Command{
 		Use:   "ls",
 		Short: "List volumes",
 		Run: func(cmd *cobra.Command, args []string) {
-			if err := openevec.VolumeLs(); err != nil {
+			if err := openevec.VolumeLs(outputFormat); err != nil {
 				log.Fatal(err)
 			}
 		},
 	}
+	volumeLsCmd.Flags().Var(
+		enumflag.New(&outputFormat, "format", outputFormatIds, enumflag.EnumCaseInsensitive),
+		"format",
+		"Format to print logs, supports: lines, json")
 	return volumeLsCmd
 }
 

pkg/eve/applications.go

@@ -1,6 +1,7 @@
 package eve
 
 import (
+	"encoding/json"
 	"fmt"
 	"os"
 	"sort"
@@ -11,13 +12,14 @@ import (
 
 	"github.com/dustin/go-humanize"
 	"github.com/lf-edge/eden/pkg/controller"
+	"github.com/lf-edge/eden/pkg/controller/types"
 	"github.com/lf-edge/eden/pkg/device"
 	"github.com/lf-edge/eve/api/go/config"
 	"github.com/lf-edge/eve/api/go/info"
 	"github.com/lf-edge/eve/api/go/metrics"
 )
 
-//AppInstState stores state of app
+// AppInstState stores state of app
 type AppInstState struct {
 	Name         string
 	UUID         string
@@ -28,11 +30,16 @@ type AppInstState struct {
 	ExternalIP   string
 	InternalPort string
 	ExternalPort string
-	Memory       string
-	macs         []string
-	volumes      map[string]uint32
-	deleted      bool
-	infoTime     time.Time
+	MemoryUsed   uint32
+	MemoryAvail  uint32
+	CPUUsage     int
+	Macs         []string
+	Volumes      map[string]uint32
+
+	prevCPUNS     uint64
+	prevCpuNSTime time.Time
+	deleted       bool
+	infoTime      time.Time
 }
 
 func appStateHeader() string {
@@ -66,9 +73,12 @@ func (appStateObj *AppInstState) toString() string {
 	if appStateObj.ExternalPort == "" {
 		external = "-"
 	}
+	memory := fmt.Sprintf("%s/%s",
+		humanize.Bytes((uint64)(appStateObj.MemoryUsed*humanize.MByte)),
+		humanize.Bytes((uint64)(appStateObj.MemoryAvail*humanize.MByte)))
 	return fmt.Sprintf("%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s",
 		appStateObj.Name, appStateObj.Image, appStateObj.UUID,
-		internal, external, appStateObj.Memory,
+		internal, external, memory,
 		appStateObj.AdamState, appStateObj.EVEState)
 }
 
@@ -131,7 +141,7 @@ func (ctx *State) initApplications(ctrl controller.Cloud, dev *device.Ctx) error
 			ExternalIP:   "-",
 			InternalPort: intPort,
 			ExternalPort: extPort,
-			volumes:      volumes,
+			Volumes:      volumes,
 			UUID:         app.Uuidandversion.Uuid,
 		}
 		ctx.applications[app.Uuidandversion.Uuid] = appStateObj
@@ -144,9 +154,14 @@ func (ctx *State) processApplicationsByMetric(msg *metrics.ZMetricMsg) {
 		for _, appMetric := range appMetrics {
 			for _, el := range ctx.applications {
 				if appMetric.AppID == el.UUID {
-					el.Memory = fmt.Sprintf("%s/%s",
-						humanize.Bytes((uint64)(appMetric.Memory.GetUsedMem()*humanize.MByte)),
-						humanize.Bytes((uint64)(appMetric.Memory.GetAvailMem()*humanize.MByte)))
+					el.MemoryAvail = appMetric.Memory.GetAvailMem()
+					el.MemoryUsed = appMetric.Memory.GetUsedMem()
+					// if not restarted
+					if el.prevCPUNS < appMetric.Cpu.TotalNs {
+						el.CPUUsage = int(float32(appMetric.Cpu.TotalNs-el.prevCPUNS) / float32(msg.GetAtTimeStamp().AsTime().Sub(el.prevCpuNSTime).Nanoseconds()) * 100.0)
+					}
+					el.prevCPUNS = appMetric.Cpu.TotalNs
+					el.prevCpuNSTime = msg.GetAtTimeStamp().AsTime()
 					break
 				}
 			}
@@ -158,19 +173,19 @@ func (ctx *State) processApplicationsByInfo(im *info.ZInfoMsg) {
 	switch im.GetZtype() {
 	case info.ZInfoTypes_ZiVolume:
 		for _, app := range ctx.applications {
-			if len(app.volumes) == 0 {
+			if len(app.Volumes) == 0 {
 				continue
 			}
 			var percent uint32
-			for vol := range app.volumes {
-				percent += app.volumes[vol] //we sum all percents of all volumes and will divide them by count
+			for vol := range app.Volumes {
+				percent += app.Volumes[vol] //we sum all percents of all volumes and will divide them by count
 				if im.GetVinfo().Uuid == vol {
-					app.volumes[vol] = im.GetVinfo().ProgressPercentage
+					app.Volumes[vol] = im.GetVinfo().ProgressPercentage
 					break
 				}
 			}
 			if strings.HasPrefix(app.EVEState, info.ZSwState_DOWNLOAD_STARTED.String()) {
-				app.EVEState = fmt.Sprintf("%s (%d%%)", info.ZSwState_DOWNLOAD_STARTED.String(), int(percent)/len(app.volumes))
+				app.EVEState = fmt.Sprintf("%s (%d%%)", info.ZSwState_DOWNLOAD_STARTED.String(), int(percent)/len(app.Volumes))
 			}
 		}
 	case info.ZInfoTypes_ZiApp:
@@ -192,22 +207,22 @@ func (ctx *State) processApplicationsByInfo(im *info.ZInfoMsg) {
 		if len(im.GetAinfo().Network) != 0 && len(im.GetAinfo().Network[0].IPAddrs) != 0 {
 			if len(im.GetAinfo().Network) > 1 {
 				appStateObj.InternalIP = []string{}
-				appStateObj.macs = []string{}
+				appStateObj.Macs = []string{}
 				for _, el := range im.GetAinfo().Network {
 					if len(el.IPAddrs) != 0 {
 						appStateObj.InternalIP = append(appStateObj.InternalIP, el.IPAddrs[0])
-						appStateObj.macs = append(appStateObj.macs, el.MacAddr)
+						appStateObj.Macs = append(appStateObj.Macs, el.MacAddr)
 					}
 				}
 			} else {
 				if len(im.GetAinfo().Network[0].IPAddrs) != 0 {
 					appStateObj.InternalIP = []string{im.GetAinfo().Network[0].IPAddrs[0]}
-					appStateObj.macs = []string{im.GetAinfo().Network[0].MacAddr}
+					appStateObj.Macs = []string{im.GetAinfo().Network[0].MacAddr}
 				}
 			}
 		} else {
 			appStateObj.InternalIP = []string{"-"}
-			appStateObj.macs = []string{}
+			appStateObj.Macs = []string{}
 		}
 		//check appStateObj not defined in adam
 		if appStateObj.AdamState != inControllerConfig {
@@ -222,7 +237,7 @@ func (ctx *State) processApplicationsByInfo(im *info.ZInfoMsg) {
 	case info.ZInfoTypes_ZiNetworkInstance: //try to find ips from NetworkInstances
 		for _, el := range im.GetNiinfo().IpAssignments {
 			for _, appStateObj := range ctx.applications {
-				for ind, mac := range appStateObj.macs {
+				for ind, mac := range appStateObj.Macs {
 					if mac == el.MacAddress {
 						appStateObj.InternalIP[ind] = el.IpAddress[0]
 					}
@@ -283,8 +298,7 @@ func (ctx *State) processApplicationsByInfo(im *info.ZInfoMsg) {
 	}
 }
 
-//PodsList prints applications
-func (ctx *State) PodsList() error {
+func (ctx *State) printPodListLines() error {
 	w := new(tabwriter.Writer)
 	w.Init(os.Stdout, 0, 8, 1, '\t', 0)
 	if _, err := fmt.Fprintln(w, appStateHeader()); err != nil {
@@ -302,3 +316,23 @@ func (ctx *State) PodsList() error {
 	}
 	return w.Flush()
 }
+
+func (ctx *State) printPodListJson() error {
+	result, err := json.MarshalIndent(ctx.Applications(), "", "    ")
+	if err != nil {
+		return err
+	}
+	fmt.Println(string(result))
+	return nil
+}
+
+// PodsList prints applications
+func (ctx *State) PodsList(outputFormat types.OutputFormat) error {
+	switch outputFormat {
+	case types.OutputFormatLines:
+		return ctx.printPodListLines()
+	case types.OutputFormatJSON:
+		return ctx.printPodListJson()
+	}
+	return fmt.Errorf("unimplemented output format")
+}

pkg/eve/networks.go

@@ -1,12 +1,14 @@
 package eve
 
 import (
+	"encoding/json"
 	"fmt"
 	"os"
 	"sort"
 	"text/tabwriter"
 
 	"github.com/lf-edge/eden/pkg/controller"
+	"github.com/lf-edge/eden/pkg/controller/types"
 	"github.com/lf-edge/eden/pkg/device"
 	"github.com/lf-edge/eve/api/go/config"
 	"github.com/lf-edge/eve/api/go/info"
@@ -17,7 +19,7 @@ import (
 type NetInstState struct {
 	Name        string
 	UUID        string
-	NetworkType config.ZNetworkInstType
+	NetworkType string
 	CIDR        string
 	Stats       string
 	AdamState   string
@@ -51,7 +53,7 @@ func (ctx *State) initNetworks(ctrl controller.Cloud, dev *device.Ctx) error {
 			AdamState:   inControllerConfig,
 			EveState:    "UNKNOWN",
 			CIDR:        ni.Ip.Subnet,
-			NetworkType: ni.InstType,
+			NetworkType: ni.InstType.String(),
 		}
 		ctx.networks[ni.Uuidandversion.Uuid] = netInstStateObj
 	}
@@ -69,7 +71,7 @@ func (ctx *State) processNetworksByInfo(im *info.ZInfoMsg) {
 				Stats:       "-",
 				AdamState:   notInControllerConfig,
 				EveState:    "UNKNOWN",
-				NetworkType: (config.ZNetworkInstType)(int32(im.GetNiinfo().InstType)),
+				NetworkType: (config.ZNetworkInstType)(int32(im.GetNiinfo().InstType)).String(),
 			}
 			ctx.networks[im.GetNiinfo().GetNetworkID()] = netInstStateObj
 		}
@@ -120,8 +122,7 @@ func (ctx *State) processNetworksByMetric(msg *metrics.ZMetricMsg) {
 	}
 }
 
-// NetList prints networks
-func (ctx *State) NetList() error {
+func (ctx *State) printNetListLines() error {
 	w := new(tabwriter.Writer)
 	w.Init(os.Stdout, 0, 8, 1, '\t', 0)
 	if _, err := fmt.Fprintln(w, netInstStateHeader()); err != nil {
@@ -139,3 +140,23 @@ func (ctx *State) NetList() error {
 	}
 	return w.Flush()
 }
+
+func (ctx *State) printNetListJson() error {
+	result, err := json.MarshalIndent(ctx.Networks(), "", "    ")
+	if err != nil {
+		return err
+	}
+	fmt.Println(string(result))
+	return nil
+}
+
+// NetList prints networks
+func (ctx *State) NetList(outputFormat types.OutputFormat) error {
+	switch outputFormat {
+	case types.OutputFormatLines:
+		return ctx.printNetListLines()
+	case types.OutputFormatJSON:
+		return ctx.printNetListJson()
+	}
+	return fmt.Errorf("unimplemented output format")
+}