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Merge pull request #210 from AkihiroSuda/crio-cgroup2
crio: support resource limitation with cgroup2
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107 changes: 107 additions & 0 deletions
107
src/patches/crio/0001-rootless-enable-resource-limit-when-cgroup-v2-contro.patch
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| From 365a74c6ab043af21a14a6db8bcdc8af14a624fe Mon Sep 17 00:00:00 2001 | ||
| From: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp> | ||
| Date: Mon, 1 Feb 2021 18:52:30 +0900 | ||
| Subject: [PATCH] rootless: enable resource limit when cgroup v2 controllers | ||
| are delegated | ||
|
|
||
| Requires systemd-delegated cgroupfs driver. | ||
| See Usernetes PR XXXX for the actual usage. | ||
|
|
||
| Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp> | ||
| --- | ||
| server/rootless.go | 64 +++++++++++++++++++++++++++++++++++++++++++++- | ||
| 1 file changed, 63 insertions(+), 1 deletion(-) | ||
|
|
||
| diff --git a/server/rootless.go b/server/rootless.go | ||
| index 39c65a90b..424669966 100644 | ||
| --- a/server/rootless.go | ||
| +++ b/server/rootless.go | ||
| @@ -1,10 +1,14 @@ | ||
| package server | ||
|
|
||
| import ( | ||
| + "io/ioutil" | ||
| + "path/filepath" | ||
| "strings" | ||
|
|
||
| + "github.com/opencontainers/runc/libcontainer/cgroups" | ||
| rspec "github.com/opencontainers/runtime-spec/specs-go" | ||
| "github.com/opencontainers/runtime-tools/generate" | ||
| + "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| func hasNetworkNamespace(config *rspec.Spec) bool { | ||
| @@ -17,7 +21,41 @@ func hasNetworkNamespace(config *rspec.Spec) bool { | ||
| } | ||
|
|
||
| func makeOCIConfigurationRootless(g *generate.Generator) { | ||
| - g.Config.Linux.Resources = nil | ||
| + // Resource limitations requires cgroup v2 delegation (https://rootlesscontaine.rs/getting-started/common/cgroup2/). | ||
| + if g.Config.Linux.Resources != nil { | ||
| + // cannot control device eBPF with rootless | ||
| + g.Config.Linux.Resources.Devices = nil | ||
| + v2Controllers := getAvailableV2Controllers() | ||
| + if _, ok := v2Controllers["memory"]; !ok && g.Config.Linux.Resources.Memory != nil { | ||
| + logrus.Warn("rootless: cgroup v2 memory controller is not delegated. Discarding memory limit.") | ||
| + g.Config.Linux.Resources.Memory = nil | ||
| + } | ||
| + if _, ok := v2Controllers["cpu"]; !ok && g.Config.Linux.Resources.CPU != nil { | ||
| + logrus.Warn("rootless: cgroup v2 cpu controller is not delegated. Discarding cpu limit.") | ||
| + g.Config.Linux.Resources.CPU = nil | ||
| + } | ||
| + if _, ok := v2Controllers["cpuset"]; !ok && g.Config.Linux.Resources.CPU != nil { | ||
| + logrus.Warn("rootless: cgroup v2 cpuset controller is not delegated. Discarding cpuset limit.") | ||
| + g.Config.Linux.Resources.CPU.Cpus = "" | ||
| + g.Config.Linux.Resources.CPU.Mems = "" | ||
| + } | ||
| + if _, ok := v2Controllers["pids"]; !ok && g.Config.Linux.Resources.Pids != nil { | ||
| + logrus.Warn("rootless: cgroup v2 pids controller is not delegated. Discarding pids limit.") | ||
| + g.Config.Linux.Resources.Pids = nil | ||
| + } | ||
| + if _, ok := v2Controllers["io"]; !ok && g.Config.Linux.Resources.BlockIO != nil { | ||
| + logrus.Warn("rootless: cgroup v2 io controller is not delegated. Discarding block I/O limit.") | ||
| + g.Config.Linux.Resources.BlockIO = nil | ||
| + } | ||
| + if _, ok := v2Controllers["rdma"]; !ok && g.Config.Linux.Resources.Rdma != nil { | ||
| + logrus.Warn("rootless: cgroup v2 rdma controller is not delegated. Discarding RDMA limit.") | ||
| + g.Config.Linux.Resources.Rdma = nil | ||
| + } | ||
| + if _, ok := v2Controllers["hugetlb"]; !ok && g.Config.Linux.Resources.HugepageLimits != nil { | ||
| + logrus.Warn("rootless: cgroup v2 hugetlb controller is not delegated. Discarding RDMA limit.") | ||
| + g.Config.Linux.Resources.HugepageLimits = nil | ||
| + } | ||
| + } | ||
| g.Config.Process.OOMScoreAdj = nil | ||
| g.Config.Process.ApparmorProfile = "" | ||
|
|
||
| @@ -45,3 +83,27 @@ func makeOCIConfigurationRootless(g *generate.Generator) { | ||
|
|
||
| g.SetLinuxCgroupsPath("") | ||
| } | ||
| + | ||
| +// getAvailableV2Controllers returns the entries in /sys/fs/cgroup/<SELF>/cgroup.controllers | ||
| +func getAvailableV2Controllers() map[string]struct{} { | ||
| + procSelfCgroup, err := cgroups.ParseCgroupFile("/proc/self/cgroup") | ||
| + if err != nil { | ||
| + logrus.WithError(err).Error("failed to parse /proc/self/cgroup") | ||
| + return nil | ||
| + } | ||
| + v2Group := procSelfCgroup[""] | ||
| + if v2Group == "" { | ||
| + return nil | ||
| + } | ||
| + controllersPath := filepath.Join("/sys/fs/cgroup", v2Group, "cgroup.controllers") | ||
| + controllersBytes, err := ioutil.ReadFile(controllersPath) | ||
| + if err != nil { | ||
| + logrus.WithError(err).Errorf("failed to read %s", controllersPath) | ||
| + return nil | ||
| + } | ||
| + result := make(map[string]struct{}) | ||
| + for _, controller := range strings.Fields(string(controllersBytes)) { | ||
| + result[controller] = struct{}{} | ||
| + } | ||
| + return result | ||
| +} | ||
| -- | ||
| 2.27.0 | ||
|
|