runconfig: split resources into a struct

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

builder/dockerfile/internals.go

@@ -498,19 +498,23 @@ func (b *Builder) create() (*daemon.Container, error) {
 	}
 	b.runConfig.Image = b.image
 
-	// TODO: why not embed a hostconfig in builder?
-	hostConfig := &runconfig.HostConfig{
+	resources := runconfig.Resources{
+		CgroupParent: b.CgroupParent,
 		CPUShares:    b.CPUShares,
 		CPUPeriod:    b.CPUPeriod,
 		CPUQuota:     b.CPUQuota,
 		CpusetCpus:   b.CPUSetCpus,
 		CpusetMems:   b.CPUSetMems,
-		CgroupParent: b.CgroupParent,
 		Memory:       b.Memory,
 		MemorySwap:   b.MemorySwap,
-		ShmSize:      b.ShmSize,
 		Ulimits:      b.Ulimits,
-		Isolation:    b.Isolation,
+	}
+
+	// TODO: why not embed a hostconfig in builder?
+	hostConfig := &runconfig.HostConfig{
+		Isolation: b.Isolation,
+		ShmSize:   b.ShmSize,
+		Resources: resources,
 	}
 
 	config := *b.runConfig

daemon/daemon_unix_test.go

@@ -22,7 +22,7 @@ func TestAdjustCPUShares(t *testing.T) {
 	}
 
 	hostConfig := &runconfig.HostConfig{
-		CPUShares: linuxMinCPUShares - 1,
+		Resources: runconfig.Resources{CPUShares: linuxMinCPUShares - 1},
 	}
 	daemon.adaptContainerSettings(hostConfig, true)
 	if hostConfig.CPUShares != linuxMinCPUShares {
@@ -60,7 +60,7 @@ func TestAdjustCPUSharesNoAdjustment(t *testing.T) {
 	}
 
 	hostConfig := &runconfig.HostConfig{
-		CPUShares: linuxMinCPUShares - 1,
+		Resources: runconfig.Resources{CPUShares: linuxMinCPUShares - 1},
 	}
 	daemon.adaptContainerSettings(hostConfig, false)
 	if hostConfig.CPUShares != linuxMinCPUShares-1 {

runconfig/hostconfig.go

@@ -165,6 +165,28 @@ type LogConfig struct {
 	Config map[string]string
 }
 
+// Resources contains container's resources (cgroups config, ulimits...)
+type Resources struct {
+	// Applicable to all platforms
+	CPUShares int64 `json:"CpuShares"` // CPU shares (relative weight vs. other containers)
+
+	// Applicable to UNIX platforms
+	CgroupParent      string // Parent cgroup.
+	BlkioWeight       uint16 // Block IO weight (relative weight vs. other containers)
+	BlkioWeightDevice []*blkiodev.WeightDevice
+	CPUPeriod         int64            `json:"CpuPeriod"` // CPU CFS (Completely Fair Scheduler) period
+	CPUQuota          int64            `json:"CpuQuota"`  // CPU CFS (Completely Fair Scheduler) quota
+	CpusetCpus        string           // CpusetCpus 0-2, 0,1
+	CpusetMems        string           // CpusetMems 0-2, 0,1
+	Devices           []DeviceMapping  // List of devices to map inside the container
+	KernelMemory      int64            // Kernel memory limit (in bytes)
+	Memory            int64            // Memory limit (in bytes)
+	MemoryReservation int64            // Memory soft limit (in bytes)
+	MemorySwap        int64            // Total memory usage (memory + swap); set `-1` to disable swap
+	MemorySwappiness  *int64           // Tuning container memory swappiness behaviour
+	Ulimits           []*ulimit.Ulimit // List of ulimits to be set in the container
+}
+
 // HostConfig the non-portable Config structure of a container.
 // Here, "non-portable" means "dependent of the host we are running on".
 // Portable information *should* appear in Config.
@@ -172,7 +194,6 @@ type HostConfig struct {
 	// Applicable to all platforms
 	Binds           []string      // List of volume bindings for this container
 	ContainerIDFile string        // File (path) where the containerId is written
-	CPUShares       int64         `json:"CpuShares"` // CPU shares (relative weight vs. other containers)
 	LogConfig       LogConfig     // Configuration of the logs for this container
 	NetworkMode     NetworkMode   // Network mode to use for the container
 	PortBindings    nat.PortMap   // Port mapping between the exposed port (container) and the host
@@ -181,41 +202,30 @@ type HostConfig struct {
 	VolumesFrom     []string      // List of volumes to take from other container
 
 	// Applicable to UNIX platforms
-	BlkioWeight       uint16 // Block IO weight (relative weight vs. other containers)
-	BlkioWeightDevice []*blkiodev.WeightDevice
-	CapAdd            *stringutils.StrSlice // List of kernel capabilities to add to the container
-	CapDrop           *stringutils.StrSlice // List of kernel capabilities to remove from the container
-	CgroupParent      string                // Parent cgroup.
-	CPUPeriod         int64                 `json:"CpuPeriod"` // CPU CFS (Completely Fair Scheduler) period
-	CPUQuota          int64                 `json:"CpuQuota"`  // CPU CFS (Completely Fair Scheduler) quota
-	CpusetCpus        string                // CpusetCpus 0-2, 0,1
-	CpusetMems        string                // CpusetMems 0-2, 0,1
-	Devices           []DeviceMapping       // List of devices to map inside the container
-	DNS               []string              `json:"Dns"`        // List of DNS server to lookup
-	DNSOptions        []string              `json:"DnsOptions"` // List of DNSOption to look for
-	DNSSearch         []string              `json:"DnsSearch"`  // List of DNSSearch to look for
-	ExtraHosts        []string              // List of extra hosts
-	GroupAdd          []string              // List of additional groups that the container process will run as
-	IpcMode           IpcMode               // IPC namespace to use for the container
-	KernelMemory      int64                 // Kernel memory limit (in bytes)
-	Links             []string              // List of links (in the name:alias form)
-	Memory            int64                 // Memory limit (in bytes)
-	MemoryReservation int64                 // Memory soft limit (in bytes)
-	MemorySwap        int64                 // Total memory usage (memory + swap); set `-1` to disable swap
-	MemorySwappiness  *int64                // Tuning container memory swappiness behaviour
-	OomKillDisable    bool                  // Whether to disable OOM Killer or not
-	PidMode           PidMode               // PID namespace to use for the container
-	Privileged        bool                  // Is the container in privileged mode
-	PublishAllPorts   bool                  // Should docker publish all exposed port for the container
-	ReadonlyRootfs    bool                  // Is the container root filesystem in read-only
-	SecurityOpt       []string              // List of string values to customize labels for MLS systems, such as SELinux.
-	Ulimits           []*ulimit.Ulimit      // List of ulimits to be set in the container
-	UTSMode           UTSMode               // UTS namespace to use for the container
-	ShmSize           int64                 // Total shm memory usage
+	CapAdd          *stringutils.StrSlice // List of kernel capabilities to add to the container
+	CapDrop         *stringutils.StrSlice // List of kernel capabilities to remove from the container
+	DNS             []string              `json:"Dns"`        // List of DNS server to lookup
+	DNSOptions      []string              `json:"DnsOptions"` // List of DNSOption to look for
+	DNSSearch       []string              `json:"DnsSearch"`  // List of DNSSearch to look for
+	ExtraHosts      []string              // List of extra hosts
+	GroupAdd        []string              // List of additional groups that the container process will run as
+	IpcMode         IpcMode               // IPC namespace to use for the container
+	Links           []string              // List of links (in the name:alias form)
+	OomKillDisable  bool                  // Whether to disable OOM Killer or not
+	PidMode         PidMode               // PID namespace to use for the container
+	Privileged      bool                  // Is the container in privileged mode
+	PublishAllPorts bool                  // Should docker publish all exposed port for the container
+	ReadonlyRootfs  bool                  // Is the container root filesystem in read-only
+	SecurityOpt     []string              // List of string values to customize labels for MLS systems, such as SELinux.
+	UTSMode         UTSMode               // UTS namespace to use for the container
+	ShmSize         int64                 // Total shm memory usage
 
 	// Applicable to Windows
 	ConsoleSize [2]int         // Initial console size
 	Isolation   IsolationLevel // Isolation level of the container (eg default, hyperv)
+
+	// Contains container's resources (cgroups, ulimits)
+	Resources
 }
 
 // DecodeHostConfig creates a HostConfig based on the specified Reader.

runconfig/parse.go

@@ -323,6 +323,24 @@ func Parse(cmd *flag.FlagSet, args []string) (*Config, *HostConfig, *flag.FlagSe
 		return nil, nil, cmd, err
 	}
 
+	resources := Resources{
+		CgroupParent:      *flCgroupParent,
+		Memory:            flMemory,
+		MemoryReservation: MemoryReservation,
+		MemorySwap:        memorySwap,
+		MemorySwappiness:  flSwappiness,
+		KernelMemory:      KernelMemory,
+		CPUShares:         *flCPUShares,
+		CPUPeriod:         *flCPUPeriod,
+		CpusetCpus:        *flCpusetCpus,
+		CpusetMems:        *flCpusetMems,
+		CPUQuota:          *flCPUQuota,
+		BlkioWeight:       *flBlkioWeight,
+		BlkioWeightDevice: flBlkioWeightDevice.GetList(),
+		Ulimits:           flUlimits.GetList(),
+		Devices:           deviceMappings,
+	}
+
 	config := &Config{
 		Hostname:     hostname,
 		Domainname:   domainname,
@@ -349,25 +367,13 @@ func Parse(cmd *flag.FlagSet, args []string) (*Config, *HostConfig, *flag.FlagSe
 	}
 
 	hostConfig := &HostConfig{
-		Binds:             binds,
-		ContainerIDFile:   *flContainerIDFile,
-		Memory:            flMemory,
-		MemoryReservation: MemoryReservation,
-		MemorySwap:        memorySwap,
-		KernelMemory:      KernelMemory,
-		CPUShares:         *flCPUShares,
-		CPUPeriod:         *flCPUPeriod,
-		CpusetCpus:        *flCpusetCpus,
-		CpusetMems:        *flCpusetMems,
-		CPUQuota:          *flCPUQuota,
-		BlkioWeight:       *flBlkioWeight,
-		BlkioWeightDevice: flBlkioWeightDevice.GetList(),
-		OomKillDisable:    *flOomKillDisable,
-		MemorySwappiness:  flSwappiness,
-		Privileged:        *flPrivileged,
-		PortBindings:      portBindings,
-		Links:             flLinks.GetAll(),
-		PublishAllPorts:   *flPublishAll,
+		Binds:           binds,
+		ContainerIDFile: *flContainerIDFile,
+		OomKillDisable:  *flOomKillDisable,
+		Privileged:      *flPrivileged,
+		PortBindings:    portBindings,
+		Links:           flLinks.GetAll(),
+		PublishAllPorts: *flPublishAll,
 		// Make sure the dns fields are never nil.
 		// New containers don't ever have those fields nil,
 		// but pre created containers can still have those nil values.
@@ -382,19 +388,17 @@ func Parse(cmd *flag.FlagSet, args []string) (*Config, *HostConfig, *flag.FlagSe
 		IpcMode:        ipcMode,
 		PidMode:        pidMode,
 		UTSMode:        utsMode,
-		Devices:        deviceMappings,
 		CapAdd:         stringutils.NewStrSlice(flCapAdd.GetAll()...),
 		CapDrop:        stringutils.NewStrSlice(flCapDrop.GetAll()...),
 		GroupAdd:       flGroupAdd.GetAll(),
 		RestartPolicy:  restartPolicy,
 		SecurityOpt:    flSecurityOpt.GetAll(),
 		ReadonlyRootfs: *flReadonlyRootfs,
-		Ulimits:        flUlimits.GetList(),
 		LogConfig:      LogConfig{Type: *flLoggingDriver, Config: loggingOpts},
-		CgroupParent:   *flCgroupParent,
 		VolumeDriver:   *flVolumeDriver,
 		Isolation:      IsolationLevel(*flIsolation),
 		ShmSize:        parsedShm,
+		Resources:      resources,
 	}
 
 	// When allocating stdin in attached mode, close stdin at client disconnect