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podman stats add networking

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Add networking information to podman stats output.  Also correct an issue filed
where memory constraints of the cgroup were not reflected in the stats output. And
finally, fix issue with PID count.

Resolves issue #364

Signed-off-by: baude <bbaude@redhat.com>

Closes: #417
Approved by: mheon
This commit is contained in:
baude
2018-02-28 10:02:54 -06:00
committed by Atomic Bot
parent 2a59653bf3
commit 7ffc89d71a
2 changed files with 24 additions and 12 deletions
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2
libpod/container.go
View File

@ -632,7 +632,7 @@ func (c *Container) NamespacePath(ns LinuxNS) (string, error) {
// CGroupPath returns a cgroups "path" for a given container.
func (c *Container) CGroupPath() cgroups.Path {
return cgroups.StaticPath(filepath.Join(c.config.CgroupParent, fmt.Sprintf("libpod-conmon-%s", c.ID())))
return cgroups.StaticPath(filepath.Join(c.config.CgroupParent, fmt.Sprintf("libpod-conmon-%s/%s", c.ID(), c.ID())))
}
// RootFsSize returns the root FS size of the container

34
libpod/stats.go
View File

@ -6,8 +6,10 @@ import (
"time"
"github.com/containerd/cgroups"
"github.com/opencontainers/runc/libcontainer"
"github.com/containernetworking/plugins/pkg/ns"
"github.com/cri-o/ocicni/pkg/ocicni"
"github.com/pkg/errors"
"github.com/vishvananda/netlink"
)
// ContainerStats contains the statistics information for a running container
@ -55,6 +57,11 @@ func (c *Container) GetContainerStats(previousStats *ContainerStats) (*Container
return stats, errors.Wrapf(err, "unable to determine container state")
}
netStats, err := getContainerNetIO(c)
if err != nil {
return nil, err
}
previousCPU := previousStats.CPUNano
previousSystem := previousStats.SystemNano
stats.CPU = calculateCPUPercent(cgroupStats, previousCPU, previousSystem)
@ -63,13 +70,14 @@ func (c *Container) GetContainerStats(previousStats *ContainerStats) (*Container
stats.MemPerc = (float64(stats.MemUsage) / float64(stats.MemLimit)) * 100
stats.PIDs = 0
if conState == ContainerStateRunning {
stats.PIDs = cgroupStats.Pids.Current - 1
stats.PIDs = cgroupStats.Pids.Current
}
stats.BlockInput, stats.BlockOutput = calculateBlockIO(cgroupStats)
stats.CPUNano = cgroupStats.CPU.Usage.Total
stats.SystemNano = cgroupStats.CPU.Usage.Kernel
// TODO Figure out where to get the Netout stuff.
//stats.NetInput, stats.NetOutput = getContainerNetIO(cgroupStats)
stats.NetInput = netStats.TxBytes
stats.NetOutput = netStats.RxBytes
return stats, nil
}
@ -90,13 +98,17 @@ func getMemLimit(cgroupLimit uint64) uint64 {
return cgroupLimit
}
// Returns the total number of bytes transmitted and received for the given container stats
func getContainerNetIO(stats *libcontainer.Stats) (received uint64, transmitted uint64) { //nolint
for _, iface := range stats.Interfaces {
received += iface.RxBytes
transmitted += iface.TxBytes
}
return
func getContainerNetIO(ctr *Container) (*netlink.LinkStatistics, error) {
var netStats *netlink.LinkStatistics
err := ns.WithNetNSPath(ctr.state.NetNS.Path(), func(_ ns.NetNS) error {
link, err := netlink.LinkByName(ocicni.DefaultInterfaceName)
if err != nil {
return err
}
netStats = link.Attrs().Statistics
return nil
})
return netStats, err
}
func calculateCPUPercent(stats *cgroups.Metrics, previousCPU, previousSystem uint64) float64 {