9077d13728
See kubernetes/enhancements issue 3857 (PR 3858). Replaces PR 9713 `cri: make read-only mounts recursively read-only` Unlike PR 9713, this PR does not automatically upgrade RO mounts to RRO. Test depends on: - kubernetes-sigs/cri-tools PR 1344 Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
116 lines
3.4 KiB
Go
116 lines
3.4 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package server
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import (
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"fmt"
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"github.com/opencontainers/selinux/go-selinux"
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"tags.cncf.io/container-device-interface/pkg/cdi"
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"github.com/containerd/containerd/v2/pkg/cap"
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"github.com/containerd/containerd/v2/pkg/kernelversion"
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"github.com/containerd/containerd/v2/pkg/userns"
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"github.com/containerd/go-cni"
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"github.com/containerd/log"
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)
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func init() {
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var err error
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kernelSupportsRRO, err = kernelversion.GreaterEqualThan(kernelversion.KernelVersion{Kernel: 5, Major: 12})
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if err != nil {
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panic(fmt.Errorf("failed to check kernel version: %w", err))
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}
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}
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// networkAttachCount is the minimum number of networks the PodSandbox
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// attaches to
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const networkAttachCount = 2
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// initPlatform handles linux specific initialization for the CRI service.
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func (c *criService) initPlatform() (err error) {
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if userns.RunningInUserNS() {
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if c.apparmorEnabled() || !c.config.RestrictOOMScoreAdj {
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log.L.Warn("Running CRI plugin in a user namespace typically requires disable_apparmor and restrict_oom_score_adj to be true")
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}
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}
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if c.config.EnableSelinux {
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if !selinux.GetEnabled() {
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log.L.Warn("Selinux is not supported")
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}
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if r := c.config.SelinuxCategoryRange; r > 0 {
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selinux.CategoryRange = uint32(r)
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}
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} else {
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selinux.SetDisabled()
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}
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pluginDirs := map[string]string{
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defaultNetworkPlugin: c.config.NetworkPluginConfDir,
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}
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for name, conf := range c.config.Runtimes {
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if conf.NetworkPluginConfDir != "" {
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pluginDirs[name] = conf.NetworkPluginConfDir
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}
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}
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c.netPlugin = make(map[string]cni.CNI)
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for name, dir := range pluginDirs {
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max := c.config.NetworkPluginMaxConfNum
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if name != defaultNetworkPlugin {
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if m := c.config.Runtimes[name].NetworkPluginMaxConfNum; m != 0 {
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max = m
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}
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}
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// Pod needs to attach to at least loopback network and a non host network,
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// hence networkAttachCount is 2. If there are more network configs the
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// pod will be attached to all the networks but we will only use the ip
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// of the default network interface as the pod IP.
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i, err := cni.New(cni.WithMinNetworkCount(networkAttachCount),
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cni.WithPluginConfDir(dir),
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cni.WithPluginMaxConfNum(max),
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cni.WithPluginDir([]string{c.config.NetworkPluginBinDir}))
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if err != nil {
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return fmt.Errorf("failed to initialize cni: %w", err)
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}
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c.netPlugin[name] = i
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}
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if c.allCaps == nil {
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c.allCaps, err = cap.Current()
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if err != nil {
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return fmt.Errorf("failed to get caps: %w", err)
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}
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}
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if c.config.EnableCDI {
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reg := cdi.GetRegistry()
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err = reg.Configure(cdi.WithSpecDirs(c.config.CDISpecDirs...))
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if err != nil {
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return fmt.Errorf("failed to configure CDI registry")
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}
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}
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return nil
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}
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// cniLoadOptions returns cni load options for the linux.
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func (c *criService) cniLoadOptions() []cni.Opt {
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return []cni.Opt{cni.WithLoNetwork, cni.WithDefaultConf}
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}
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