podman: add option --cgroup-conf

cmd/podman/common/create.go

@@ -516,5 +516,10 @@ func GetCreateFlags(cf *ContainerCLIOpts) *pflag.FlagSet {
 		"seccomp-policy", "default",
 		"Policy for selecting a seccomp profile (experimental)",
 	)
+	createFlags.StringSliceVar(
+		&cf.CgroupConf,
+		"cgroup-conf", []string{},
+		"Configure cgroup v2 (key=value)",
+	)
 	return &createFlags
 }

cmd/podman/common/create_opts.go

@@ -106,4 +106,6 @@ type ContainerCLIOpts struct {
 	SeccompPolicy     string
 
 	Net *entities.NetOptions
+
+	CgroupConf []string
 }

cmd/podman/common/specgen.go

@@ -450,7 +450,20 @@ func FillOutSpecGen(s *specgen.SpecGenerator, c *ContainerCLIOpts, args []string
 		s.ResourceLimits.Pids = &pids
 	}
 	s.ResourceLimits.CPU = getCPULimits(c)
-	if s.ResourceLimits.CPU == nil && s.ResourceLimits.Pids == nil && s.ResourceLimits.BlockIO == nil && s.ResourceLimits.Memory == nil {
+
+	unifieds := make(map[string]string)
+	for _, unified := range c.CgroupConf {
+		splitUnified := strings.SplitN(unified, "=", 2)
+		if len(splitUnified) < 2 {
+			return errors.Errorf("--cgroup-conf must be formatted KEY=VALUE")
+		}
+		unifieds[splitUnified[0]] = splitUnified[1]
+	}
+	if len(unifieds) > 0 {
+		s.ResourceLimits.Unified = unifieds
+	}
+
+	if s.ResourceLimits.CPU == nil && s.ResourceLimits.Pids == nil && s.ResourceLimits.BlockIO == nil && s.ResourceLimits.Memory == nil && s.ResourceLimits.Unified == nil {
 		s.ResourceLimits = nil
 	}
 

completions/bash/podman

@@ -2107,6 +2107,7 @@ _podman_container_run() {
 		--cap-add
 		--cap-drop
 		--cgroup-parent
+		--cgroup-conf
 		--cidfile
 		--conmon-pidfile
 		--cpu-period

docs/source/markdown/podman-create.1.md

@@ -89,6 +89,10 @@ The *split* option splits the current cgroup in two sub-cgroups: one for conmon
 
 Path to cgroups under which the cgroup for the container will be created. If the path is not absolute, the path is considered to be relative to the cgroups path of the init process. Cgroups will be created if they do not already exist.
 
+**--cgroup-conf**=*KEY=VALUE*
+
+When running on cgroup v2, specify the cgroup file to write to and its value.  For example **--cgroup-conf=memory.high=1073741824** sets the memory.high limit to 1GB.
+
 **--cidfile**=*id*
 
 Write the container ID to the file

docs/source/markdown/podman-run.1.md

@@ -104,6 +104,10 @@ The **split** option splits the current cgroup in two sub-cgroups: one for conmo
 
 Path to cgroups under which the cgroup for the container will be created. If the path is not absolute, the path is considered to be relative to the cgroups path of the init process. Cgroups will be created if they do not already exist.
 
+**--cgroup-conf**=*KEY=VALUE*
+
+When running on cgroup v2, specify the cgroup file to write to and its value.  For example **--cgroup-conf=memory.high=1073741824** sets the memory.high limit to 1GB.
+
 **--cidfile**=*file*
 
 Write the container ID to *file*.

go.mod

@@ -40,8 +40,8 @@ require (
 	github.com/opencontainers/go-digest v1.0.0
 	github.com/opencontainers/image-spec v1.0.2-0.20190823105129-775207bd45b6
 	github.com/opencontainers/runc v1.0.0-rc91.0.20200708210054-ce54a9d4d79b
-	github.com/opencontainers/runtime-spec v1.0.3-0.20200520003142-237cc4f519e2
-	github.com/opencontainers/runtime-tools v0.9.1-0.20200714183735-07406c5828aa
+	github.com/opencontainers/runtime-spec v1.0.3-0.20200817204227-f9c09b4ea1df
+	github.com/opencontainers/runtime-tools v0.9.0
 	github.com/opencontainers/selinux v1.6.0
 	github.com/opentracing/opentracing-go v1.2.0
 	github.com/pkg/errors v0.9.1

go.sum

@@ -344,10 +344,11 @@ github.com/opencontainers/runc v1.0.0-rc91.0.20200708210054-ce54a9d4d79b/go.mod
 github.com/opencontainers/runtime-spec v0.1.2-0.20190507144316-5b71a03e2700/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
 github.com/opencontainers/runtime-spec v1.0.3-0.20200520003142-237cc4f519e2 h1:9mv9SC7GWmRWE0J/+oD8w3GsN2KYGKtg6uwLN7hfP5E=
 github.com/opencontainers/runtime-spec v1.0.3-0.20200520003142-237cc4f519e2/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
+github.com/opencontainers/runtime-spec v1.0.3-0.20200817204227-f9c09b4ea1df h1:5AW5dMFSXVH4Mg3WYe4z7ui64bK8n66IoWK8i6T4QZ8=
+github.com/opencontainers/runtime-spec v1.0.3-0.20200817204227-f9c09b4ea1df/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
 github.com/opencontainers/runtime-tools v0.0.0-20181011054405-1d69bd0f9c39/go.mod h1:r3f7wjNzSs2extwzU3Y+6pKfobzPh+kKFJ3ofN+3nfs=
+github.com/opencontainers/runtime-tools v0.9.0 h1:FYgwVsKRI/H9hU32MJ/4MLOzXWodKK5zsQavY8NPMkU=
 github.com/opencontainers/runtime-tools v0.9.0/go.mod h1:r3f7wjNzSs2extwzU3Y+6pKfobzPh+kKFJ3ofN+3nfs=
-github.com/opencontainers/runtime-tools v0.9.1-0.20200714183735-07406c5828aa h1:iyj+fFHVBn0xOalz9UChYzSU1K0HJ+d75b4YqShBRhI=
-github.com/opencontainers/runtime-tools v0.9.1-0.20200714183735-07406c5828aa/go.mod h1:r3f7wjNzSs2extwzU3Y+6pKfobzPh+kKFJ3ofN+3nfs=
 github.com/opencontainers/selinux v1.3.0/go.mod h1:+BLncwf63G4dgOzykXAxcmnFlUaOlkDdmw/CqsW6pjs=
 github.com/opencontainers/selinux v1.5.1/go.mod h1:yTcKuYAh6R95iDpefGLQaPaRwJFwyzAJufJyiTt7s0g=
 github.com/opencontainers/selinux v1.5.2/go.mod h1:yTcKuYAh6R95iDpefGLQaPaRwJFwyzAJufJyiTt7s0g=

libpod/container_inspect.go

@@ -465,6 +465,7 @@ func (c *Container) generateInspectContainerHostConfig(ctrSpec *spec.Spec, named
 			if ctrSpec.Linux.Resources.Pids != nil {
 				hostConfig.PidsLimit = ctrSpec.Linux.Resources.Pids.Limit
 			}
+			hostConfig.CgroupConf = ctrSpec.Linux.Resources.Unified
 			if ctrSpec.Linux.Resources.BlockIO != nil {
 				if ctrSpec.Linux.Resources.BlockIO.Weight != nil {
 					hostConfig.BlkioWeight = *ctrSpec.Linux.Resources.BlockIO.Weight

libpod/container_internal_linux.go

@@ -385,7 +385,8 @@ func (c *Container) generateSpec(ctx context.Context) (*spec.Spec, error) {
 		if err != nil {
 			return nil, errors.Wrapf(err, "Invalid Umask Value")
 		}
-		g.SetProcessUmask(uint32(decVal))
+		umask := uint32(decVal)
+		g.Config.Process.User.Umask = &umask
 	}
 
 	// Add addition groups if c.config.GroupAdd is not empty

libpod/define/container_inspect.go

@@ -518,6 +518,8 @@ type InspectContainerHostConfig struct {
 	IOMaximumIOps uint64 `json:"IOMaximumIOps"`
 	// IOMaximumBandwidth is Windows-only and not presently implemented.
 	IOMaximumBandwidth uint64 `json:"IOMaximumBandwidth"`
+	// CgroupConf is the configuration for cgroup v2.
+	CgroupConf map[string]string `json:"CgroupConf"`
 }
 
 // InspectBasicNetworkConfig holds basic configuration information (e.g. IP

pkg/spec/createconfig.go

@@ -31,12 +31,13 @@ const (
 type CreateResourceConfig struct {
 	BlkioWeight       uint16   // blkio-weight
 	BlkioWeightDevice []string // blkio-weight-device
-	CPUPeriod         uint64   // cpu-period
-	CPUQuota          int64    // cpu-quota
-	CPURtPeriod       uint64   // cpu-rt-period
-	CPURtRuntime      int64    // cpu-rt-runtime
-	CPUShares         uint64   // cpu-shares
-	CPUs              float64  // cpus
+	CgroupConf        map[string]string
+	CPUPeriod         uint64  // cpu-period
+	CPUQuota          int64   // cpu-quota
+	CPURtPeriod       uint64  // cpu-rt-period
+	CPURtRuntime      int64   // cpu-rt-runtime
+	CPUShares         uint64  // cpu-shares
+	CPUs              float64 // cpus
 	CPUsetCPUs        string
 	CPUsetMems        string   // cpuset-mems
 	DeviceCgroupRules []string //device-cgroup-rule

pkg/specgen/generate/validate.go

@@ -23,6 +23,12 @@ func verifyContainerResources(s *specgen.SpecGenerator) ([]string, error) {
 		return warnings, nil
 	}
 
+	if s.ResourceLimits.Unified != nil {
+		if !cgroup2 {
+			return nil, errors.New("Cannot use --cgroup-conf without cgroup v2")
+		}
+	}
+
 	// Memory checks
 	if s.ResourceLimits.Memory != nil {
 		memory := s.ResourceLimits.Memory

pkg/specgen/specgen.go

@@ -415,6 +415,10 @@ type ContainerResourceConfig struct {
 	ThrottleReadIOPSDevice map[string]spec.LinuxThrottleDevice `json:"throttleReadIOPSDevice,omitempty"`
 	// IO write rate limit per cgroup per device, IO per second
 	ThrottleWriteIOPSDevice map[string]spec.LinuxThrottleDevice `json:"throttleWriteIOPSDevice,omitempty"`
+	// CgroupConf are key-value options passed into the container runtime
+	// that are used to configure cgroup v2.
+	// Optional.
+	CgroupConf map[string]string `json:"unified,omitempty"`
 }
 
 // ContainerHealthCheckConfig describes a container healthcheck with attributes