mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
74 lines
2.5 KiB
Go
74 lines
2.5 KiB
Go
// +build linux
|
|
|
|
package containerd
|
|
|
|
import (
|
|
"context"
|
|
"io/ioutil"
|
|
"os"
|
|
|
|
"github.com/opencontainers/runc/libcontainer/system"
|
|
"github.com/pkg/errors"
|
|
"github.com/rancher/k3s/pkg/agent/templates"
|
|
util2 "github.com/rancher/k3s/pkg/agent/util"
|
|
"github.com/rancher/k3s/pkg/cgroups"
|
|
"github.com/rancher/k3s/pkg/daemons/config"
|
|
"github.com/rancher/k3s/pkg/version"
|
|
"github.com/rancher/wharfie/pkg/registries"
|
|
"github.com/sirupsen/logrus"
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
// setupContainerdConfig generates the containerd.toml, using a template combined with various
|
|
// runtime configurations and registry mirror settings provided by the administrator.
|
|
func setupContainerdConfig(ctx context.Context, cfg *config.Node) error {
|
|
privRegistries, err := registries.GetPrivateRegistries(cfg.AgentConfig.PrivateRegistry)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
isRunningInUserNS := system.RunningInUserNS()
|
|
_, _, hasCFS, hasPIDs := cgroups.CheckCgroups()
|
|
// "/sys/fs/cgroup" is namespaced
|
|
cgroupfsWritable := unix.Access("/sys/fs/cgroup", unix.W_OK) == nil
|
|
disableCgroup := isRunningInUserNS && (!hasCFS || !hasPIDs || !cgroupfsWritable)
|
|
if disableCgroup {
|
|
logrus.Warn("cgroup v2 controllers are not delegated for rootless. Disabling cgroup.")
|
|
}
|
|
|
|
var containerdTemplate string
|
|
containerdConfig := templates.ContainerdConfig{
|
|
NodeConfig: cfg,
|
|
DisableCgroup: disableCgroup,
|
|
IsRunningInUserNS: isRunningInUserNS,
|
|
PrivateRegistryConfig: privRegistries.Registry(),
|
|
}
|
|
|
|
selEnabled, selConfigured, err := selinuxStatus()
|
|
if err != nil {
|
|
return errors.Wrap(err, "failed to detect selinux")
|
|
}
|
|
switch {
|
|
case !cfg.SELinux && selEnabled:
|
|
logrus.Warn("SELinux is enabled on this host, but " + version.Program + " has not been started with --selinux - containerd SELinux support is disabled")
|
|
case cfg.SELinux && !selConfigured:
|
|
logrus.Warnf("SELinux is enabled for "+version.Program+" but process is not running in context '%s', "+version.Program+"-selinux policy may need to be applied", SELinuxContextType)
|
|
}
|
|
|
|
containerdTemplateBytes, err := ioutil.ReadFile(cfg.Containerd.Template)
|
|
if err == nil {
|
|
logrus.Infof("Using containerd template at %s", cfg.Containerd.Template)
|
|
containerdTemplate = string(containerdTemplateBytes)
|
|
} else if os.IsNotExist(err) {
|
|
containerdTemplate = templates.ContainerdConfigTemplate
|
|
} else {
|
|
return err
|
|
}
|
|
parsedTemplate, err := templates.ParseTemplateFromConfig(containerdTemplate, containerdConfig)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return util2.WriteFile(cfg.Containerd.Config, parsedTemplate)
|
|
}
|