v0.6.1

Dockerfile

@@ -1,3 +1,16 @@
+FROM quay.io/vektorcloud/go:1.8
+
+RUN apk add --no-cache make
+
+COPY glide.* /go/src/github.com/bcicen/ctop/
+WORKDIR /go/src/github.com/bcicen/ctop/
+RUN glide install
+
+COPY . /go/src/github.com/bcicen/ctop
+RUN make build && \
+    mkdir -p /go/bin && \
+    mv -v ctop /go/bin/
+
 FROM scratch
-COPY ./ctop /ctop
+COPY --from=0 /go/bin/ctop /ctop
 ENTRYPOINT ["/ctop"]

Dockerfile_build

@@ -1,12 +0,0 @@
-FROM quay.io/vektorcloud/go:1.8
-
-RUN apk add --no-cache make
-
-COPY glide.* /go/src/github.com/bcicen/ctop/
-WORKDIR /go/src/github.com/bcicen/ctop/
-RUN glide install
-
-COPY . /go/src/github.com/bcicen/ctop
-RUN make build && \
-    mkdir -p /go/bin && \
-    mv -v ctop /go/bin/

Makefile

@@ -5,7 +5,7 @@ EXT_LD_FLAGS="-Wl,--allow-multiple-definition"
 LD_FLAGS="-w -X main.version=$(VERSION) -X main.build=$(BUILD) -extldflags=$(EXT_LD_FLAGS)"
 
 clean:
-	rm -rf build/ release/
+	rm -rf _build/ _release/
 
 build:
 	glide install
@@ -16,21 +16,18 @@ build-dev:
 
 build-all:
 	mkdir -p build
-	GOOS=darwin GOARCH=amd64 go build -tags release -ldflags $(LD_FLAGS) -o build/ctop-$(VERSION)-darwin-amd64
+	GOOS=darwin GOARCH=amd64 go build -tags release -ldflags $(LD_FLAGS) -o _build/ctop-$(VERSION)-darwin-amd64
-	GOOS=linux  GOARCH=amd64 go build -tags release -ldflags $(LD_FLAGS) -o build/ctop-$(VERSION)-linux-amd64
+	GOOS=linux  GOARCH=amd64 go build -tags release -ldflags $(LD_FLAGS) -o _build/ctop-$(VERSION)-linux-amd64
-	GOOS=linux  GOARCH=arm   go build -tags release -ldflags $(LD_FLAGS) -o build/ctop-$(VERSION)-linux-arm
+	GOOS=linux  GOARCH=arm   go build -tags release -ldflags $(LD_FLAGS) -o _build/ctop-$(VERSION)-linux-arm
-	GOOS=linux  GOARCH=arm64 go build -tags release -ldflags $(LD_FLAGS) -o build/ctop-$(VERSION)-linux-arm64
+	GOOS=linux  GOARCH=arm64 go build -tags release -ldflags $(LD_FLAGS) -o _build/ctop-$(VERSION)-linux-arm64
 
 image:
-	docker build -t ctop_build -f Dockerfile_build .
-	docker create --name=ctop_built ctop_build ctop -v
-	docker cp ctop_built:/go/bin/ctop .
 	docker build -t ctop -f Dockerfile .
 
 release:
-	mkdir release
+	mkdir _release
 	go get github.com/progrium/gh-release/...
-	cp build/* release
+	cp _build/* _release
 	gh-release create bcicen/$(NAME) $(VERSION) \
 		$(shell git rev-parse --abbrev-ref HEAD) $(VERSION)
 

README.md

@@ -20,7 +20,7 @@ Fetch the [latest release](https://github.com/bcicen/ctop/releases) for your pla
 #### Linux
 
 ```bash
-sudo wget https://github.com/bcicen/ctop/releases/download/v0.6/ctop-0.6-linux-amd64 -O /usr/local/bin/ctop
+sudo wget https://github.com/bcicen/ctop/releases/download/v0.6.0/ctop-0.6.0-linux-amd64 -O /usr/local/bin/ctop
 sudo chmod +x /usr/local/bin/ctop
 ```
 
@@ -31,7 +31,7 @@ brew install ctop
 ```
 or
 ```bash
-sudo curl -Lo /usr/local/bin/ctop https://github.com/bcicen/ctop/releases/download/v0.6/ctop-0.6-darwin-amd64
+sudo curl -Lo /usr/local/bin/ctop https://github.com/bcicen/ctop/releases/download/v0.6.0/ctop-0.6.0-darwin-amd64
 sudo chmod +x /usr/local/bin/ctop
 ```
 

VERSION

@@ -1 +1 @@
-0.6.0
+0.6.1

connector/collector/docker.go

@@ -1,17 +1,17 @@
 package collector
 
 import (
-	"github.com/bcicen/ctop/metrics"
+	"github.com/bcicen/ctop/models"
 	api "github.com/fsouza/go-dockerclient"
 )
 
 // Docker collector
 type Docker struct {
-	metrics.Metrics
+	models.Metrics
 	id         string
 	client     *api.Client
 	running    bool
-	stream     chan metrics.Metrics
+	stream     chan models.Metrics
 	done       chan bool
 	lastCpu    float64
 	lastSysCpu float64
@@ -19,7 +19,7 @@ type Docker struct {
 
 func NewDocker(client *api.Client, id string) *Docker {
 	return &Docker{
-		Metrics: metrics.Metrics{},
+		Metrics: models.Metrics{},
 		id:      id,
 		client:  client,
 	}
@@ -27,7 +27,7 @@ func NewDocker(client *api.Client, id string) *Docker {
 
 func (c *Docker) Start() {
 	c.done = make(chan bool)
-	c.stream = make(chan metrics.Metrics)
+	c.stream = make(chan models.Metrics)
 	stats := make(chan *api.Stats)
 
 	go func() {
@@ -61,10 +61,14 @@ func (c *Docker) Running() bool {
 	return c.running
 }
 
-func (c *Docker) Stream() chan metrics.Metrics {
+func (c *Docker) Stream() chan models.Metrics {
 	return c.stream
 }
 
+func (c *Docker) Logs() LogCollector {
+	return &DockerLogs{c.id, c.client, make(chan bool)}
+}
+
 // Stop collector
 func (c *Docker) Stop() {
 	c.done <- true

connector/collector/docker_logs.go

@@ -0,0 +1,74 @@
+package collector
+
+import (
+	"bufio"
+	"context"
+	"io"
+	"strings"
+	"time"
+
+	"github.com/bcicen/ctop/models"
+	api "github.com/fsouza/go-dockerclient"
+)
+
+type DockerLogs struct {
+	id     string
+	client *api.Client
+	done   chan bool
+}
+
+func (l *DockerLogs) Stream() chan models.Log {
+	r, w := io.Pipe()
+	logCh := make(chan models.Log)
+	ctx, cancel := context.WithCancel(context.Background())
+
+	opts := api.LogsOptions{
+		Context:      ctx,
+		Container:    l.id,
+		OutputStream: w,
+		ErrorStream:  w,
+		Stdout:       true,
+		Stderr:       true,
+		Tail:         "10",
+		Follow:       true,
+		Timestamps:   true,
+	}
+
+	// read io pipe into channel
+	go func() {
+		scanner := bufio.NewScanner(r)
+		for scanner.Scan() {
+			parts := strings.Split(scanner.Text(), " ")
+			ts := l.parseTime(parts[0])
+			logCh <- models.Log{ts, strings.Join(parts[1:], " ")}
+		}
+	}()
+
+	// connect to container log stream
+	go func() {
+		err := l.client.Logs(opts)
+		if err != nil {
+			log.Errorf("error reading container logs: %s", err)
+		}
+	}()
+
+	go func() {
+		select {
+		case <-l.done:
+			cancel()
+		}
+	}()
+
+	return logCh
+}
+
+func (l *DockerLogs) Stop() { l.done <- true }
+
+func (l *DockerLogs) parseTime(s string) time.Time {
+	ts, err := time.Parse("2006-01-02T15:04:05.000000000Z", s)
+	if err != nil {
+		log.Errorf("failed to parse container log: %s", err)
+		ts = time.Now()
+	}
+	return ts
+}

connector/collector/main.go

@@ -4,10 +4,24 @@ import (
 	"math"
 
 	"github.com/bcicen/ctop/logging"
+	"github.com/bcicen/ctop/models"
 )
 
 var log = logging.Init()
 
+type LogCollector interface {
+	Stream() chan models.Log
+	Stop()
+}
+
+type Collector interface {
+	Stream() chan models.Metrics
+	Logs() LogCollector
+	Running() bool
+	Start()
+	Stop()
+}
+
 func round(num float64) int {
 	return int(num + math.Copysign(0.5, num))
 }

connector/collector/mock.go

@@ -6,13 +6,13 @@ import (
 	"math/rand"
 	"time"
 
-	"github.com/bcicen/ctop/metrics"
+	"github.com/bcicen/ctop/models"
 )
 
 // Mock collector
 type Mock struct {
-	metrics.Metrics
+	models.Metrics
-	stream     chan metrics.Metrics
+	stream     chan models.Metrics
 	done       bool
 	running    bool
 	aggression int64
@@ -20,7 +20,7 @@ type Mock struct {
 
 func NewMock(a int64) *Mock {
 	c := &Mock{
-		Metrics:    metrics.Metrics{},
+		Metrics:    models.Metrics{},
 		aggression: a,
 	}
 	c.MemLimit = 2147483648
@@ -33,7 +33,7 @@ func (c *Mock) Running() bool {
 
 func (c *Mock) Start() {
 	c.done = false
-	c.stream = make(chan metrics.Metrics)
+	c.stream = make(chan models.Metrics)
 	go c.run()
 }
 
@@ -41,10 +41,14 @@ func (c *Mock) Stop() {
 	c.done = true
 }
 
-func (c *Mock) Stream() chan metrics.Metrics {
+func (c *Mock) Stream() chan models.Metrics {
 	return c.stream
 }
 
+func (c *Mock) Logs() LogCollector {
+	return &MockLogs{make(chan bool)}
+}
+
 func (c *Mock) run() {
 	c.running = true
 	rand.Seed(int64(time.Now().Nanosecond()))

connector/collector/mock_logs.go

@@ -0,0 +1,31 @@
+package collector
+
+import (
+	"time"
+
+	"github.com/bcicen/ctop/models"
+)
+
+const mockLog = "Cura ob pro qui tibi inveni dum qua fit donec amare illic mea, regem falli contexo pro peregrinorum heremo absconditi araneae meminerim deliciosas actionibus facere modico dura sonuerunt psalmi contra rerum, tempus mala anima volebant dura quae o modis."
+
+type MockLogs struct {
+	done chan bool
+}
+
+func (l *MockLogs) Stream() chan models.Log {
+	logCh := make(chan models.Log)
+	go func() {
+		for {
+			select {
+			case <-l.done:
+				break
+			default:
+				logCh <- models.Log{time.Now(), mockLog}
+				time.Sleep(250 * time.Millisecond)
+			}
+		}
+	}()
+	return logCh
+}
+
+func (l *MockLogs) Stop() { l.done <- true }

connector/collector/runc.go

@@ -5,17 +5,17 @@ package collector
 import (
 	"time"
 
-	"github.com/bcicen/ctop/metrics"
+	"github.com/bcicen/ctop/models"
 	"github.com/opencontainers/runc/libcontainer"
 	"github.com/opencontainers/runc/libcontainer/cgroups"
 )
 
 // Runc collector
 type Runc struct {
-	metrics.Metrics
+	models.Metrics
 	id         string
 	libc       libcontainer.Container
-	stream     chan metrics.Metrics
+	stream     chan models.Metrics
 	done       bool
 	running    bool
 	interval   int // collection interval, in seconds
@@ -25,7 +25,7 @@ type Runc struct {
 
 func NewRunc(libc libcontainer.Container) *Runc {
 	c := &Runc{
-		Metrics:  metrics.Metrics{},
+		Metrics:  models.Metrics{},
 		id:       libc.ID(),
 		libc:     libc,
 		interval: 1,
@@ -39,7 +39,7 @@ func (c *Runc) Running() bool {
 
 func (c *Runc) Start() {
 	c.done = false
-	c.stream = make(chan metrics.Metrics)
+	c.stream = make(chan models.Metrics)
 	go c.run()
 }
 
@@ -47,10 +47,14 @@ func (c *Runc) Stop() {
 	c.done = true
 }
 
-func (c *Runc) Stream() chan metrics.Metrics {
+func (c *Runc) Stream() chan models.Metrics {
 	return c.stream
 }
 
+func (c *Runc) Logs() LogCollector {
+	return nil
+}
+
 func (c *Runc) run() {
 	c.running = true
 	defer close(c.stream)

connector/docker.go

@@ -66,7 +66,7 @@ func portsFormat(ports map[api.Port][]api.PortBinding) string {
 			continue
 		}
 		for _, binding := range v {
-			s := fmt.Sprintf("%s -> %s:%s", k, binding.HostIP, binding.HostPort)
+			s := fmt.Sprintf("%s:%s -> %s", binding.HostIP, binding.HostPort, k)
 			published = append(published, s)
 		}
 	}

container/main.go

@@ -1,10 +1,11 @@
 package container
 
 import (
+	"github.com/bcicen/ctop/connector/collector"
 	"github.com/bcicen/ctop/cwidgets"
 	"github.com/bcicen/ctop/cwidgets/compact"
 	"github.com/bcicen/ctop/logging"
-	"github.com/bcicen/ctop/metrics"
+	"github.com/bcicen/ctop/models"
 )
 
 var (
@@ -13,19 +14,19 @@ var (
 
 // Metrics and metadata representing a container
 type Container struct {
-	metrics.Metrics
+	models.Metrics
 	Id        string
 	Meta      map[string]string
 	Widgets   *compact.Compact
 	Display   bool // display this container in compact view
 	updater   cwidgets.WidgetUpdater
-	collector metrics.Collector
+	collector collector.Collector
 }
 
-func New(id string, collector metrics.Collector) *Container {
+func New(id string, collector collector.Collector) *Container {
 	widgets := compact.NewCompact(id)
 	return &Container{
-		Metrics:   metrics.NewMetrics(),
+		Metrics:   models.NewMetrics(),
 		Id:        id,
 		Meta:      make(map[string]string),
 		Widgets:   widgets,
@@ -66,15 +67,20 @@ func (c *Container) SetState(s string) {
 	}
 }
 
+// Return container log collector
+func (c *Container) Logs() collector.LogCollector {
+	return c.collector.Logs()
+}
+
 // Read metric stream, updating widgets
-func (c *Container) Read(stream chan metrics.Metrics) {
+func (c *Container) Read(stream chan models.Metrics) {
 	go func() {
 		for metrics := range stream {
 			c.Metrics = metrics
 			c.updater.SetMetrics(metrics)
 		}
 		log.Infof("reader stopped for container: %s", c.Id)
-		c.Metrics = metrics.NewMetrics()
+		c.Metrics = models.NewMetrics()
 		c.Widgets.Reset()
 	}()
 	log.Infof("reader started for container: %s", c.Id)

cursor.go

@@ -142,10 +142,11 @@ func (gc *GridCursor) PgUp() {
 		return
 	}
 
-	var nextidx int
+	nextidx := int(math.Max(0.0, float64(idx-cGrid.MaxRows())))
-	nextidx = int(math.Max(0.0, float64(idx-cGrid.MaxRows())))
+	if gc.pgCount() > 0 {
 		cGrid.Offset = int(math.Max(float64(cGrid.Offset-cGrid.MaxRows()),
 			float64(0)))
+	}
 
 	active := gc.filtered[idx]
 	next := gc.filtered[nextidx]
@@ -164,11 +165,11 @@ func (gc *GridCursor) PgDown() {
 		return
 	}
 
-	var nextidx int
+	nextidx := int(math.Min(float64(gc.Len()-1), float64(idx+cGrid.MaxRows())))
-	nextidx = int(math.Min(float64(gc.Len()-1),
+	if gc.pgCount() > 0 {
-		float64(idx+cGrid.MaxRows())))
 		cGrid.Offset = int(math.Min(float64(cGrid.Offset+cGrid.MaxRows()),
 			float64(gc.Len()-cGrid.MaxRows())))
+	}
 
 	active := gc.filtered[idx]
 	next := gc.filtered[nextidx]
@@ -180,3 +181,12 @@ func (gc *GridCursor) PgDown() {
 	cGrid.Align()
 	ui.Render(cGrid)
 }
+
+// number of pages at current row count and term height
+func (gc *GridCursor) pgCount() int {
+	pages := gc.Len() / cGrid.MaxRows()
+	if gc.Len()%cGrid.MaxRows() > 0 {
+		pages++
+	}
+	return pages
+}

cwidgets/compact/grid.go

@@ -22,9 +22,14 @@ func NewCompactGrid() *CompactGrid {
 
 func (cg *CompactGrid) Align() {
 	y := cg.Y
+
 	if cg.Offset >= len(cg.Rows) {
 		cg.Offset = 0
 	}
+	if cg.Offset < 0 {
+		cg.Offset = 0
+	}
+
 	// update row ypos, width recursively
 	for _, r := range cg.pageRows() {
 		r.SetY(y)

cwidgets/compact/main.go

@@ -2,7 +2,7 @@ package compact
 
 import (
 	"github.com/bcicen/ctop/logging"
-	"github.com/bcicen/ctop/metrics"
+	"github.com/bcicen/ctop/models"
 	ui "github.com/gizak/termui"
 )
 
@@ -59,7 +59,7 @@ func (row *Compact) SetMeta(k, v string) {
 	}
 }
 
-func (row *Compact) SetMetrics(m metrics.Metrics) {
+func (row *Compact) SetMetrics(m models.Metrics) {
 	row.SetCPU(m.CPUUtil)
 	row.SetNet(m.NetRx, m.NetTx)
 	row.SetMem(m.MemUsage, m.MemLimit, m.MemPercent)

cwidgets/expanded/logs.go

@@ -0,0 +1,83 @@
+package expanded
+
+import (
+	"time"
+
+	"github.com/bcicen/ctop/models"
+	ui "github.com/gizak/termui"
+)
+
+type LogLines struct {
+	ts   []time.Time
+	data []string
+}
+
+func NewLogLines(max int) *LogLines {
+	ll := &LogLines{
+		ts:   make([]time.Time, max),
+		data: make([]string, max),
+	}
+	return ll
+}
+
+func (ll *LogLines) tail(n int) []string {
+	lines := make([]string, n)
+	for i := 0; i < n; i++ {
+		lines = append(lines, ll.data[len(ll.data)-i])
+	}
+	return lines
+}
+func (ll *LogLines) getLines(start, end int) []string {
+	if end < 0 {
+		return ll.data[start:]
+	}
+	return ll.data[start:end]
+}
+
+func (ll *LogLines) add(l models.Log) {
+	if len(ll.data) == cap(ll.data) {
+		ll.data = append(ll.data[:0], ll.data[1:]...)
+		ll.ts = append(ll.ts[:0], ll.ts[1:]...)
+	}
+	ll.ts = append(ll.ts, l.Timestamp)
+	ll.data = append(ll.data, l.Message)
+	log.Debugf("recorded log line: %v", l)
+}
+
+type Logs struct {
+	*ui.List
+	lines *LogLines
+}
+
+func NewLogs(stream chan models.Log) *Logs {
+	p := ui.NewList()
+	p.Y = ui.TermHeight() / 2
+	p.X = 0
+	p.Height = ui.TermHeight() - p.Y
+	p.Width = ui.TermWidth()
+	//p.Overflow = "wrap"
+	p.ItemFgColor = ui.ThemeAttr("par.text.fg")
+	i := &Logs{p, NewLogLines(4098)}
+	go func() {
+		for line := range stream {
+			i.lines.add(line)
+			ui.Render(i)
+		}
+	}()
+	return i
+}
+
+func (w *Logs) Align() {
+	w.X = colWidth[0]
+	w.List.Align()
+}
+
+func (w *Logs) Buffer() ui.Buffer {
+	maxLines := w.Height - 2
+	offset := len(w.lines.data) - maxLines
+	w.Items = w.lines.getLines(offset, -1)
+	return w.List.Buffer()
+}
+
+// number of rows a line will occupy at current panel width
+func (w *Logs) lineHeight(s string) int { return (len(s) / w.InnerWidth()) + 1 }

cwidgets/expanded/main.go

@@ -2,7 +2,7 @@ package expanded
 
 import (
 	"github.com/bcicen/ctop/logging"
-	"github.com/bcicen/ctop/metrics"
+	"github.com/bcicen/ctop/models"
 	ui "github.com/gizak/termui"
 )
 
@@ -55,7 +55,7 @@ func (e *Expanded) Down() {
 func (e *Expanded) SetWidth(w int)      { e.Width = w }
 func (e *Expanded) SetMeta(k, v string) { e.Info.Set(k, v) }
 
-func (e *Expanded) SetMetrics(m metrics.Metrics) {
+func (e *Expanded) SetMetrics(m models.Metrics) {
 	e.Cpu.Update(m.CPUUtil)
 	e.Net.Update(m.NetRx, m.NetTx)
 	e.Mem.Update(int(m.MemUsage), int(m.MemLimit))

cwidgets/main.go

@@ -2,12 +2,12 @@ package cwidgets
 
 import (
 	"github.com/bcicen/ctop/logging"
-	"github.com/bcicen/ctop/metrics"
+	"github.com/bcicen/ctop/models"
 )
 
 var log = logging.Init()
 
 type WidgetUpdater interface {
 	SetMeta(string, string)
-	SetMetrics(metrics.Metrics)
+	SetMetrics(models.Metrics)
 }

debug.go

@@ -3,11 +3,14 @@ package main
 import (
 	"fmt"
 	"reflect"
+	"runtime"
 
 	"github.com/bcicen/ctop/container"
 	ui "github.com/gizak/termui"
 )
 
+var mstats = &runtime.MemStats{}
+
 func logEvent(e ui.Event) {
 	var s string
 	s += fmt.Sprintf("Type=%s", quote(e.Type))
@@ -19,6 +22,22 @@ func logEvent(e ui.Event) {
 	log.Debugf("new event: %s", s)
 }
 
+func runtimeStats() {
+	var msg string
+	msg += fmt.Sprintf("cgo calls=%v", runtime.NumCgoCall())
+	msg += fmt.Sprintf(" routines=%v", runtime.NumGoroutine())
+	runtime.ReadMemStats(mstats)
+	msg += fmt.Sprintf(" numgc=%v", mstats.NumGC)
+	msg += fmt.Sprintf(" alloc=%v", mstats.Alloc)
+	log.Debugf("runtime: %v", msg)
+}
+
+func runtimeStack() {
+	buf := make([]byte, 32768)
+	buf = buf[:runtime.Stack(buf, true)]
+	log.Infof(fmt.Sprintf("stack:\n%v", string(buf)))
+}
+
 // log container, metrics, and widget state
 func dumpContainer(c *container.Container) {
 	msg := fmt.Sprintf("logging state for container: %s\n", c.Id)

main.go

@@ -4,6 +4,7 @@ import (
 	"flag"
 	"fmt"
 	"os"
+	"runtime"
 
 	"github.com/bcicen/ctop/config"
 	"github.com/bcicen/ctop/connector"
@@ -18,13 +19,14 @@ import (
 var (
 	build     = "none"
 	version   = "dev-build"
+	goVersion = runtime.Version()
 
 	log    *logging.CTopLogger
 	cursor *GridCursor
 	cGrid  *compact.CompactGrid
 	header *widgets.CTopHeader
 
-	versionStr = fmt.Sprintf("ctop version %v, build %v", version, build)
+	versionStr = fmt.Sprintf("ctop version %v, build %v %v", version, build, goVersion)
 )
 
 func main() {

models/main.go

@@ -1,4 +1,11 @@
-package metrics
+package models
+
+import "time"
+
+type Log struct {
+	Timestamp time.Time
+	Message   string
+}
 
 type Metrics struct {
 	CPUUtil      int
@@ -24,10 +31,3 @@ func NewMetrics() Metrics {
 		Pids:         -1,
 	}
 }
-
-type Collector interface {
-	Stream() chan Metrics
-	Running() bool
-	Start()
-	Stop()
-}