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Merge pull request #13220 from Microsoft/10662-sysinfo

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Windows: Refactor sysinfo for compilation
This commit is contained in:
Brian Goff 2015-05-15 10:53:55 -04:00
commit 70a497a7e9
3 changed files with 87 additions and 78 deletions
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79
sysinfo/sysinfo.go
View file

@ -1,17 +1,7 @@
package sysinfo
import (
"io/ioutil"
"os"
"path"
"strconv"
"strings"
"github.com/Sirupsen/logrus"
"github.com/docker/libcontainer/cgroups"
)
// SysInfo stores information about which features a kernel supports.
// TODO Windows: Factor out platform specific capabilities.
type SysInfo struct {
MemoryLimit bool
SwapLimit bool
@ -21,70 +11,3 @@ type SysInfo struct {
AppArmor bool
OomKillDisable bool
}
// New returns a new SysInfo, using the filesystem to detect which features the kernel supports.
func New(quiet bool) *SysInfo {
sysInfo := &SysInfo{}
if cgroupMemoryMountpoint, err := cgroups.FindCgroupMountpoint("memory"); err != nil {
if !quiet {
logrus.Warnf("Your kernel does not support cgroup memory limit: %v", err)
}
} else {
// If memory cgroup is mounted, MemoryLimit is always enabled.
sysInfo.MemoryLimit = true
_, err1 := ioutil.ReadFile(path.Join(cgroupMemoryMountpoint, "memory.memsw.limit_in_bytes"))
sysInfo.SwapLimit = err1 == nil
if !sysInfo.SwapLimit && !quiet {
logrus.Warn("Your kernel does not support swap memory limit.")
}
_, err = ioutil.ReadFile(path.Join(cgroupMemoryMountpoint, "memory.oom_control"))
sysInfo.OomKillDisable = err == nil
if !sysInfo.OomKillDisable && !quiet {
logrus.Warnf("Your kernel does not support oom control.")
}
}
if cgroupCpuMountpoint, err := cgroups.FindCgroupMountpoint("cpu"); err != nil {
if !quiet {
logrus.Warnf("%v", err)
}
} else {
_, err := ioutil.ReadFile(path.Join(cgroupCpuMountpoint, "cpu.cfs_period_us"))
sysInfo.CpuCfsPeriod = err == nil
if !sysInfo.CpuCfsPeriod && !quiet {
logrus.Warn("Your kernel does not support cgroup cfs period")
}
_, err = ioutil.ReadFile(path.Join(cgroupCpuMountpoint, "cpu.cfs_quota_us"))
sysInfo.CpuCfsQuota = err == nil
if !sysInfo.CpuCfsQuota && !quiet {
logrus.Warn("Your kernel does not support cgroup cfs quotas")
}
}
// Checek if ipv4_forward is disabled.
if data, err := ioutil.ReadFile("/proc/sys/net/ipv4/ip_forward"); os.IsNotExist(err) {
sysInfo.IPv4ForwardingDisabled = true
} else {
if enabled, _ := strconv.Atoi(strings.TrimSpace(string(data))); enabled == 0 {
sysInfo.IPv4ForwardingDisabled = true
} else {
sysInfo.IPv4ForwardingDisabled = false
}
}
// Check if AppArmor is supported.
if _, err := os.Stat("/sys/kernel/security/apparmor"); os.IsNotExist(err) {
sysInfo.AppArmor = false
} else {
sysInfo.AppArmor = true
}
// Check if Devices cgroup is mounted, it is hard requirement for container security.
if _, err := cgroups.FindCgroupMountpoint("devices"); err != nil {
logrus.Fatalf("Error mounting devices cgroup: %v", err)
}
return sysInfo
}

79
sysinfo/sysinfo_linux.go Normal file
View file

@ -0,0 +1,79 @@
package sysinfo
import (
"io/ioutil"
"os"
"path"
"strconv"
"strings"
"github.com/Sirupsen/logrus"
"github.com/docker/libcontainer/cgroups"
)
// New returns a new SysInfo, using the filesystem to detect which features the kernel supports.
func New(quiet bool) *SysInfo {
sysInfo := &SysInfo{}
if cgroupMemoryMountpoint, err := cgroups.FindCgroupMountpoint("memory"); err != nil {
if !quiet {
logrus.Warnf("Your kernel does not support cgroup memory limit: %v", err)
}
} else {
// If memory cgroup is mounted, MemoryLimit is always enabled.
sysInfo.MemoryLimit = true
_, err1 := ioutil.ReadFile(path.Join(cgroupMemoryMountpoint, "memory.memsw.limit_in_bytes"))
sysInfo.SwapLimit = err1 == nil
if !sysInfo.SwapLimit && !quiet {
logrus.Warn("Your kernel does not support swap memory limit.")
}
_, err = ioutil.ReadFile(path.Join(cgroupMemoryMountpoint, "memory.oom_control"))
sysInfo.OomKillDisable = err == nil
if !sysInfo.OomKillDisable && !quiet {
logrus.Warnf("Your kernel does not support oom control.")
}
}
if cgroupCpuMountpoint, err := cgroups.FindCgroupMountpoint("cpu"); err != nil {
if !quiet {
logrus.Warnf("%v", err)
}
} else {
_, err := ioutil.ReadFile(path.Join(cgroupCpuMountpoint, "cpu.cfs_period_us"))
sysInfo.CpuCfsPeriod = err == nil
if !sysInfo.CpuCfsPeriod && !quiet {
logrus.Warn("Your kernel does not support cgroup cfs period")
}
_, err = ioutil.ReadFile(path.Join(cgroupCpuMountpoint, "cpu.cfs_quota_us"))
sysInfo.CpuCfsQuota = err == nil
if !sysInfo.CpuCfsQuota && !quiet {
logrus.Warn("Your kernel does not support cgroup cfs quotas")
}
}
// Checek if ipv4_forward is disabled.
if data, err := ioutil.ReadFile("/proc/sys/net/ipv4/ip_forward"); os.IsNotExist(err) {
sysInfo.IPv4ForwardingDisabled = true
} else {
if enabled, _ := strconv.Atoi(strings.TrimSpace(string(data))); enabled == 0 {
sysInfo.IPv4ForwardingDisabled = true
} else {
sysInfo.IPv4ForwardingDisabled = false
}
}
// Check if AppArmor is supported.
if _, err := os.Stat("/sys/kernel/security/apparmor"); os.IsNotExist(err) {
sysInfo.AppArmor = false
} else {
sysInfo.AppArmor = true
}
// Check if Devices cgroup is mounted, it is hard requirement for container security.
if _, err := cgroups.FindCgroupMountpoint("devices"); err != nil {
logrus.Fatalf("Error mounting devices cgroup: %v", err)
}
return sysInfo
}

7
sysinfo/sysinfo_windows.go Normal file
View file

@ -0,0 +1,7 @@
package sysinfo
// TODO Windows
func New(quiet bool) *SysInfo {
sysInfo := &SysInfo{}
return sysInfo
}