mirror of
https://github.com/bcicen/ctop.git
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120 lines
2.4 KiB
Go
120 lines
2.4 KiB
Go
package collector
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import (
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"github.com/bcicen/ctop/models"
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api "github.com/fsouza/go-dockerclient"
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)
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// Docker collector
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type Docker struct {
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models.Metrics
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id string
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client *api.Client
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running bool
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stream chan models.Metrics
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done chan bool
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lastCpu float64
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lastSysCpu float64
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}
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func NewDocker(client *api.Client, id string) *Docker {
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return &Docker{
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Metrics: models.Metrics{},
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id: id,
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client: client,
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}
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}
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func (c *Docker) Start() {
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c.done = make(chan bool)
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c.stream = make(chan models.Metrics)
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stats := make(chan *api.Stats)
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go func() {
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opts := api.StatsOptions{
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ID: c.id,
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Stats: stats,
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Stream: true,
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Done: c.done,
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}
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c.client.Stats(opts)
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c.running = false
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}()
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go func() {
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defer close(c.stream)
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for s := range stats {
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c.ReadCPU(s)
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c.ReadMem(s)
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c.ReadNet(s)
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c.ReadIO(s)
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c.stream <- c.Metrics
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}
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log.Infof("collector stopped for container: %s", c.id)
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}()
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c.running = true
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log.Infof("collector started for container: %s", c.id)
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}
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func (c *Docker) Running() bool {
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return c.running
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}
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func (c *Docker) Stream() chan models.Metrics {
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return c.stream
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}
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func (c *Docker) Logs() LogCollector {
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return NewDockerLogs(c.id, c.client)
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}
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// Stop collector
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func (c *Docker) Stop() {
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c.running = false
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c.done <- true
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}
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func (c *Docker) ReadCPU(stats *api.Stats) {
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ncpus := uint8(len(stats.CPUStats.CPUUsage.PercpuUsage))
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total := float64(stats.CPUStats.CPUUsage.TotalUsage)
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system := float64(stats.CPUStats.SystemCPUUsage)
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cpudiff := total - c.lastCpu
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syscpudiff := system - c.lastSysCpu
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c.NCpus = ncpus
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c.CPUUtil = percent(cpudiff, syscpudiff)
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c.lastCpu = total
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c.lastSysCpu = system
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c.Pids = int(stats.PidsStats.Current)
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}
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func (c *Docker) ReadMem(stats *api.Stats) {
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c.MemUsage = int64(stats.MemoryStats.Usage - stats.MemoryStats.Stats.Cache)
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c.MemLimit = int64(stats.MemoryStats.Limit)
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c.MemPercent = percent(float64(c.MemUsage), float64(c.MemLimit))
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}
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func (c *Docker) ReadNet(stats *api.Stats) {
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var rx, tx int64
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for _, network := range stats.Networks {
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rx += int64(network.RxBytes)
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tx += int64(network.TxBytes)
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}
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c.NetRx, c.NetTx = rx, tx
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}
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func (c *Docker) ReadIO(stats *api.Stats) {
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var read, write int64
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for _, blk := range stats.BlkioStats.IOServiceBytesRecursive {
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if blk.Op == "Read" {
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read += int64(blk.Value)
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}
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if blk.Op == "Write" {
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write += int64(blk.Value)
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}
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}
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c.IOBytesRead, c.IOBytesWrite = read, write
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}
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