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Move sysinfo out of daemon struct 

sysinfo struct was initialized at daemon startup to make sure
kernel configs such as device cgroup are present and error out if not.
The struct was embedded in daemon struct making impossible to detect
if some system config is changed at daemon runtime (i.e. someone
umount the memory cgroup). This leads to container's starts failure if
some config is changed at daemon runtime.
This patch moves sysinfo out of daemon and initilize and check it when
needed (daemon startup, containers creation, contaienrs startup for
now).

Signed-off-by: Antonio Murdaca <runcom@linux.com>
This commit is contained in:
Antonio Murdaca 2015-08-06 13:54:48 +02:00
parent ad5355151c
commit 472b6f66e0
4 changed files with 24 additions and 23 deletions
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6
daemon/daemon.go
View File

@ -92,7 +92,6 @@ type Daemon struct {
graph *graph.Graph
repositories *graph.TagStore
idIndex *truncindex.TruncIndex
sysInfo *sysinfo.SysInfo
config *Config
containerGraph *graphdb.Database
driver graphdriver.Driver
@ -725,7 +724,6 @@ func NewDaemon(config *Config, registryService *registry.Service) (daemon *Daemo
d.graph = g
d.repositories = repositories
d.idIndex = truncindex.NewTruncIndex([]string{})
d.sysInfo = sysInfo
d.config = config
d.sysInitPath = sysInitPath
d.execDriver = ed
@ -858,10 +856,6 @@ func (daemon *Daemon) Config() *Config {
return daemon.config
}
func (daemon *Daemon) SystemConfig() *sysinfo.SysInfo {
return daemon.sysInfo
}
func (daemon *Daemon) SystemInitPath() string {
return daemon.sysInitPath
}

18
daemon/daemon_unix.go
View File

@ -18,6 +18,7 @@ import (
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/parsers"
"github.com/docker/docker/pkg/parsers/kernel"
"github.com/docker/docker/pkg/sysinfo"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/runconfig"
"github.com/docker/docker/utils"
@ -148,7 +149,8 @@ func (daemon *Daemon) adaptContainerSettings(hostConfig *runconfig.HostConfig, a
// verifyPlatformContainerSettings performs platform-specific validation of the
// hostconfig and config structures.
func verifyPlatformContainerSettings(daemon *Daemon, hostConfig *runconfig.HostConfig, config *runconfig.Config) ([]string, error) {
var warnings []string
warnings := []string{}
sysInfo := sysinfo.New(false)
if hostConfig.LxcConf.Len() > 0 && !strings.Contains(daemon.ExecutionDriver().Name(), "lxc") {
return warnings, fmt.Errorf("Cannot use --lxc-conf with execdriver: %s", daemon.ExecutionDriver().Name())
@ -156,12 +158,12 @@ func verifyPlatformContainerSettings(daemon *Daemon, hostConfig *runconfig.HostC
if hostConfig.Memory != 0 && hostConfig.Memory < 4194304 {
return warnings, fmt.Errorf("Minimum memory limit allowed is 4MB")
}
if hostConfig.Memory > 0 && !daemon.SystemConfig().MemoryLimit {
if hostConfig.Memory > 0 && !sysInfo.MemoryLimit {
warnings = append(warnings, "Your kernel does not support memory limit capabilities. Limitation discarded.")
logrus.Warnf("Your kernel does not support memory limit capabilities. Limitation discarded.")
hostConfig.Memory = 0
}
if hostConfig.Memory > 0 && hostConfig.MemorySwap != -1 && !daemon.SystemConfig().SwapLimit {
if hostConfig.Memory > 0 && hostConfig.MemorySwap != -1 && !sysInfo.SwapLimit {
warnings = append(warnings, "Your kernel does not support swap limit capabilities, memory limited without swap.")
logrus.Warnf("Your kernel does not support swap limit capabilities, memory limited without swap.")
hostConfig.MemorySwap = -1
@ -172,7 +174,7 @@ func verifyPlatformContainerSettings(daemon *Daemon, hostConfig *runconfig.HostC
if hostConfig.Memory == 0 && hostConfig.MemorySwap > 0 {
return warnings, fmt.Errorf("You should always set the Memory limit when using Memoryswap limit, see usage.")
}
if hostConfig.MemorySwappiness != nil && !daemon.SystemConfig().MemorySwappiness {
if hostConfig.MemorySwappiness != nil && !sysInfo.MemorySwappiness {
warnings = append(warnings, "Your kernel does not support memory swappiness capabilities, memory swappiness discarded.")
logrus.Warnf("Your kernel does not support memory swappiness capabilities, memory swappiness discarded.")
hostConfig.MemorySwappiness = nil
@ -183,12 +185,12 @@ func verifyPlatformContainerSettings(daemon *Daemon, hostConfig *runconfig.HostC
return warnings, fmt.Errorf("Invalid value: %v, valid memory swappiness range is 0-100.", swappiness)
}
}
if hostConfig.CPUPeriod > 0 && !daemon.SystemConfig().CPUCfsPeriod {
if hostConfig.CPUPeriod > 0 && !sysInfo.CPUCfsPeriod {
warnings = append(warnings, "Your kernel does not support CPU cfs period. Period discarded.")
logrus.Warnf("Your kernel does not support CPU cfs period. Period discarded.")
hostConfig.CPUPeriod = 0
}
if hostConfig.CPUQuota > 0 && !daemon.SystemConfig().CPUCfsQuota {
if hostConfig.CPUQuota > 0 && !sysInfo.CPUCfsQuota {
warnings = append(warnings, "Your kernel does not support CPU cfs quota. Quota discarded.")
logrus.Warnf("Your kernel does not support CPU cfs quota. Quota discarded.")
hostConfig.CPUQuota = 0
@ -196,11 +198,11 @@ func verifyPlatformContainerSettings(daemon *Daemon, hostConfig *runconfig.HostC
if hostConfig.BlkioWeight > 0 && (hostConfig.BlkioWeight < 10 || hostConfig.BlkioWeight > 1000) {
return warnings, fmt.Errorf("Range of blkio weight is from 10 to 1000.")
}
if hostConfig.OomKillDisable && !daemon.SystemConfig().OomKillDisable {
if hostConfig.OomKillDisable && !sysInfo.OomKillDisable {
hostConfig.OomKillDisable = false
return warnings, fmt.Errorf("Your kernel does not support oom kill disable.")
}
if daemon.SystemConfig().IPv4ForwardingDisabled {
if sysInfo.IPv4ForwardingDisabled {
warnings = append(warnings, "IPv4 forwarding is disabled. Networking will not work.")
logrus.Warnf("IPv4 forwarding is disabled. Networking will not work")
}

19
daemon/info.go
View File

@ -11,6 +11,7 @@ import (
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/parsers/kernel"
"github.com/docker/docker/pkg/parsers/operatingsystem"
"github.com/docker/docker/pkg/sysinfo"
"github.com/docker/docker/pkg/system"
"github.com/docker/docker/registry"
"github.com/docker/docker/utils"
@ -56,15 +57,17 @@ func (daemon *Daemon) SystemInfo() (*types.Info, error) {
initPath = daemon.SystemInitPath()
}
sysInfo := sysinfo.New(false)
v := &types.Info{
ID: daemon.ID,
Containers: len(daemon.List()),
Images: imgcount,
Driver: daemon.GraphDriver().String(),
DriverStatus: daemon.GraphDriver().Status(),
IPv4Forwarding: !daemon.SystemConfig().IPv4ForwardingDisabled,
BridgeNfIptables: !daemon.SystemConfig().BridgeNfCallIptablesDisabled,
BridgeNfIp6tables: !daemon.SystemConfig().BridgeNfCallIP6tablesDisabled,
IPv4Forwarding: !sysInfo.IPv4ForwardingDisabled,
BridgeNfIptables: !sysInfo.BridgeNfCallIptablesDisabled,
BridgeNfIp6tables: !sysInfo.BridgeNfCallIP6tablesDisabled,
Debug: os.Getenv("DEBUG") != "",
NFd: fileutils.GetTotalUsedFds(),
NGoroutines: runtime.NumGoroutine(),
@ -90,11 +93,11 @@ func (daemon *Daemon) SystemInfo() (*types.Info, error) {
// sysinfo.cgroupCpuInfo will be nil otherwise and cause a SIGSEGV if
// an attempt is made to access through them.
if runtime.GOOS != "windows" {
v.MemoryLimit = daemon.SystemConfig().MemoryLimit
v.SwapLimit = daemon.SystemConfig().SwapLimit
v.OomKillDisable = daemon.SystemConfig().OomKillDisable
v.CpuCfsPeriod = daemon.SystemConfig().CPUCfsPeriod
v.CpuCfsQuota = daemon.SystemConfig().CPUCfsQuota
v.MemoryLimit = sysInfo.MemoryLimit
v.SwapLimit = sysInfo.SwapLimit
v.OomKillDisable = sysInfo.OomKillDisable
v.CpuCfsPeriod = sysInfo.CPUCfsPeriod
v.CpuCfsQuota = sysInfo.CPUCfsQuota
}
if httpProxy := os.Getenv("http_proxy"); httpProxy != "" {

4
pkg/sysinfo/sysinfo_linux.go
View File

@ -10,7 +10,9 @@ import (
"github.com/opencontainers/runc/libcontainer/cgroups"
)
// New returns a new SysInfo, using the filesystem to detect which features the kernel supports.
// New returns a new SysInfo, using the filesystem to detect which features
// the kernel supports. If `quiet` is `true` warnings are printed in logs
// whenever an error occurs or misconfigurations are present.
func New(quiet bool) *SysInfo {
sysInfo := &SysInfo{}
sysInfo.cgroupMemInfo = checkCgroupMem(quiet)