mirror of
https://github.com/hanzoai/visor.git
synced 2026-09-24 17:04:14 +00:00
Shailend ChandandgVisor bot
8d0941cd22
Much like how cgroup v1 control files are already queryable. "runsc events" now consults cgroup2 control files when --mount-cgroup-v2 is true, for cpu and memory usage stats. Currently runsc does not place each in-sandbox container is its own cgroup2 node like it does with cgroup v1, hence we just test queries against the root cgroup2 node for now. PiperOrigin-RevId: 950984770
101 lines
3.1 KiB
Go
101 lines
3.1 KiB
Go
// Copyright 2022 The gVisor Authors.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package cmd
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
|
|
"github.com/google/subcommands"
|
|
specs "github.com/opencontainers/runtime-spec/specs-go"
|
|
"gvisor.dev/gvisor/pkg/sentry/control"
|
|
"gvisor.dev/gvisor/runsc/cmd/util"
|
|
"gvisor.dev/gvisor/runsc/config"
|
|
"gvisor.dev/gvisor/runsc/container"
|
|
"gvisor.dev/gvisor/runsc/flag"
|
|
)
|
|
|
|
// ReadControl implements subcommands.Command for the "read-control" command.
|
|
type ReadControl struct {
|
|
containerLoader
|
|
}
|
|
|
|
// Name implements subcommands.Command.Name.
|
|
func (*ReadControl) Name() string {
|
|
return "read-control"
|
|
}
|
|
|
|
// Synopsis implements subcommands.Command.Synopsis.
|
|
func (*ReadControl) Synopsis() string {
|
|
return "read a cgroups control value inside the container"
|
|
}
|
|
|
|
// Usage implements subcommands.Command.Usage.
|
|
func (*ReadControl) Usage() string {
|
|
return `read-control <container-id> <controller> <cgroup-path> <control-value-name>
|
|
|
|
Where "<container-id>" is the name for the instance of the container,
|
|
"<controller>" is the name of an active cgroup controller (used for cgroup v1
|
|
hierarchies; ignored for cgroup v2 unified hierarchy), <cgroup-path> is the path
|
|
to the cgroup to read and <control-value-name> is the name of the control file
|
|
to read.
|
|
|
|
EXAMPLE:
|
|
# cgroup v1:
|
|
# runsc read-control <container-id> cpuacct / cpuacct.usage
|
|
# cgroup v2:
|
|
# runsc read-control <container-id> memory / memory.current
|
|
# runsc read-control <container-id> cpu / cpu.stat
|
|
`
|
|
}
|
|
|
|
// SetFlags implements subcommands.Command.SetFlags.
|
|
func (r *ReadControl) SetFlags(f *flag.FlagSet) {}
|
|
|
|
// FetchSpec implements util.SubCommand.FetchSpec.
|
|
func (r *ReadControl) FetchSpec(conf *config.Config, f *flag.FlagSet) (string, *specs.Spec, error) {
|
|
c, err := r.loadContainer(conf, f, container.LoadOpts{SkipCheck: true})
|
|
if err != nil {
|
|
return "", nil, fmt.Errorf("loading container: %w", err)
|
|
}
|
|
return c.ID, c.Spec, nil
|
|
}
|
|
|
|
// Execute implements subcommands.Command.Execute.
|
|
func (r *ReadControl) Execute(_ context.Context, f *flag.FlagSet, args ...any) subcommands.ExitStatus {
|
|
if f.NArg() != 4 {
|
|
f.Usage()
|
|
return subcommands.ExitUsageError
|
|
}
|
|
|
|
conf := args[0].(*config.Config)
|
|
c, err := r.loadContainer(conf, f, container.LoadOpts{SkipCheck: true})
|
|
if err != nil {
|
|
util.Fatalf("loading container: %v", err)
|
|
}
|
|
|
|
out, err := c.Sandbox.CgroupsReadControlFile(control.CgroupControlFile{
|
|
Controller: f.Arg(1),
|
|
Path: f.Arg(2),
|
|
Name: f.Arg(3),
|
|
})
|
|
if err != nil {
|
|
fmt.Printf("ERROR: %s\n", err)
|
|
return subcommands.ExitFailure
|
|
}
|
|
fmt.Printf("%s\n", out)
|
|
return subcommands.ExitSuccess
|
|
}
|