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Rename Capabilities in sysinfo and move it to its own subpackage

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Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: creack)

Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: crosbymichael)
This commit is contained in:
Guillaume J. Charmes 2014-01-15 14:36:13 -08:00 committed by Michael Crosby
parent e15a64d1a2
commit c23d7367a7
1 changed files with 55 additions and 0 deletions
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55
sysinfo/sysinfo.go Normal file
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package sysinfo
import (
"github.com/dotcloud/docker/cgroups"
"github.com/dotcloud/docker/utils"
"io/ioutil"
"log"
"os"
"path"
)
type SysInfo struct {
MemoryLimit bool
SwapLimit bool
IPv4ForwardingDisabled bool
AppArmor bool
}
func New(quiet bool) *SysInfo {
sysInfo := &SysInfo{}
if cgroupMemoryMountpoint, err := cgroups.FindCgroupMountpoint("memory"); err != nil {
if !quiet {
log.Printf("WARNING: %s\n", err)
}
} else {
_, err1 := ioutil.ReadFile(path.Join(cgroupMemoryMountpoint, "memory.limit_in_bytes"))
_, err2 := ioutil.ReadFile(path.Join(cgroupMemoryMountpoint, "memory.soft_limit_in_bytes"))
sysInfo.MemoryLimit = err1 == nil && err2 == nil
if !sysInfo.MemoryLimit && !quiet {
log.Printf("WARNING: Your kernel does not support cgroup memory limit.")
}
_, err = ioutil.ReadFile(path.Join(cgroupMemoryMountpoint, "memory.memsw.limit_in_bytes"))
sysInfo.SwapLimit = err == nil
if !sysInfo.SwapLimit && !quiet {
log.Printf("WARNING: Your kernel does not support cgroup swap limit.")
}
}
content, err3 := ioutil.ReadFile("/proc/sys/net/ipv4/ip_forward")
sysInfo.IPv4ForwardingDisabled = err3 != nil || len(content) == 0 || content[0] != '1'
if sysInfo.IPv4ForwardingDisabled && !quiet {
log.Printf("WARNING: IPv4 forwarding is disabled.")
}
// Check if AppArmor seems to be enabled on this system.
if _, err := os.Stat("/sys/kernel/security/apparmor"); os.IsNotExist(err) {
utils.Debugf("/sys/kernel/security/apparmor not found; assuming AppArmor is not enabled.")
sysInfo.AppArmor = false
} else {
utils.Debugf("/sys/kernel/security/apparmor found; assuming AppArmor is enabled.")
sysInfo.AppArmor = true
}
return sysInfo
}