Refactor pkg/sysinfo
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn
parent
93d994e29c
commit
53460047e4
1 changed files with 215 additions and 199 deletions
|
|
@ -26,225 +26,241 @@ func findCgroupMountpoints() (map[string]string, error) {
|
|||
return mps, nil
|
||||
}
|
||||
|
||||
type infoCollector func(info *SysInfo, cgMounts map[string]string) (warnings []string)
|
||||
|
||||
// New returns a new SysInfo, using the filesystem to detect which features
|
||||
// the kernel supports. If `quiet` is `false` warnings are printed in logs
|
||||
// whenever an error occurs or misconfigurations are present.
|
||||
func New(quiet bool) *SysInfo {
|
||||
var ops []infoCollector
|
||||
var warnings []string
|
||||
sysInfo := &SysInfo{}
|
||||
cgMounts, err := findCgroupMountpoints()
|
||||
if err != nil {
|
||||
logrus.Warnf("Failed to parse cgroup information: %v", err)
|
||||
logrus.Warn(err)
|
||||
} else {
|
||||
sysInfo.cgroupMemInfo = checkCgroupMem(cgMounts, quiet)
|
||||
sysInfo.cgroupCPUInfo = checkCgroupCPU(cgMounts, quiet)
|
||||
sysInfo.cgroupBlkioInfo = checkCgroupBlkioInfo(cgMounts, quiet)
|
||||
sysInfo.cgroupCpusetInfo = checkCgroupCpusetInfo(cgMounts, quiet)
|
||||
sysInfo.cgroupPids = checkCgroupPids(quiet)
|
||||
ops = append(ops, []infoCollector{
|
||||
applyMemoryCgroupInfo,
|
||||
applyCPUCgroupInfo,
|
||||
applyBlkioCgroupInfo,
|
||||
applyCPUSetCgroupInfo,
|
||||
applyPIDSCgroupInfo,
|
||||
applyDevicesCgroupInfo,
|
||||
}...)
|
||||
}
|
||||
|
||||
ops = append(ops, []infoCollector{
|
||||
applyNetworkingInfo,
|
||||
applyAppArmorInfo,
|
||||
applySeccompInfo,
|
||||
}...)
|
||||
|
||||
for _, o := range ops {
|
||||
w := o(sysInfo, cgMounts)
|
||||
warnings = append(warnings, w...)
|
||||
}
|
||||
if !quiet {
|
||||
for _, w := range warnings {
|
||||
logrus.Warn(w)
|
||||
}
|
||||
}
|
||||
return sysInfo
|
||||
}
|
||||
|
||||
// applyMemoryCgroupInfo reads the memory information from the memory cgroup mount point.
|
||||
func applyMemoryCgroupInfo(info *SysInfo, cgMounts map[string]string) []string {
|
||||
var warnings []string
|
||||
mountPoint, ok := cgMounts["memory"]
|
||||
if !ok {
|
||||
warnings = append(warnings, "Your kernel does not support cgroup memory limit")
|
||||
return warnings
|
||||
}
|
||||
info.MemoryLimit = ok
|
||||
|
||||
info.SwapLimit = cgroupEnabled(mountPoint, "memory.memsw.limit_in_bytes")
|
||||
if !info.SwapLimit {
|
||||
warnings = append(warnings, "Your kernel does not support swap memory limit")
|
||||
}
|
||||
info.MemoryReservation = cgroupEnabled(mountPoint, "memory.soft_limit_in_bytes")
|
||||
if !info.MemoryReservation {
|
||||
warnings = append(warnings, "Your kernel does not support memory reservation")
|
||||
}
|
||||
info.OomKillDisable = cgroupEnabled(mountPoint, "memory.oom_control")
|
||||
if !info.OomKillDisable {
|
||||
warnings = append(warnings, "Your kernel does not support oom control")
|
||||
}
|
||||
info.MemorySwappiness = cgroupEnabled(mountPoint, "memory.swappiness")
|
||||
if !info.MemorySwappiness {
|
||||
warnings = append(warnings, "Your kernel does not support memory swappiness")
|
||||
}
|
||||
info.KernelMemory = cgroupEnabled(mountPoint, "memory.kmem.limit_in_bytes")
|
||||
if !info.KernelMemory {
|
||||
warnings = append(warnings, "Your kernel does not support kernel memory limit")
|
||||
}
|
||||
info.KernelMemoryTCP = cgroupEnabled(mountPoint, "memory.kmem.tcp.limit_in_bytes")
|
||||
if !info.KernelMemoryTCP {
|
||||
warnings = append(warnings, "Your kernel does not support kernel memory TCP limit")
|
||||
}
|
||||
|
||||
return warnings
|
||||
}
|
||||
|
||||
// applyCPUCgroupInfo reads the cpu information from the cpu cgroup mount point.
|
||||
func applyCPUCgroupInfo(info *SysInfo, cgMounts map[string]string) []string {
|
||||
var warnings []string
|
||||
mountPoint, ok := cgMounts["cpu"]
|
||||
if !ok {
|
||||
warnings = append(warnings, "Unable to find cpu cgroup in mounts")
|
||||
return warnings
|
||||
}
|
||||
|
||||
info.CPUShares = cgroupEnabled(mountPoint, "cpu.shares")
|
||||
if !info.CPUShares {
|
||||
warnings = append(warnings, "Your kernel does not support cgroup cpu shares")
|
||||
}
|
||||
|
||||
info.CPUCfsPeriod = cgroupEnabled(mountPoint, "cpu.cfs_period_us")
|
||||
if !info.CPUCfsPeriod {
|
||||
warnings = append(warnings, "Your kernel does not support cgroup cfs period")
|
||||
}
|
||||
|
||||
info.CPUCfsQuota = cgroupEnabled(mountPoint, "cpu.cfs_quota_us")
|
||||
if !info.CPUCfsQuota {
|
||||
warnings = append(warnings, "Your kernel does not support cgroup cfs quotas")
|
||||
}
|
||||
|
||||
info.CPURealtimePeriod = cgroupEnabled(mountPoint, "cpu.rt_period_us")
|
||||
if !info.CPURealtimePeriod {
|
||||
warnings = append(warnings, "Your kernel does not support cgroup rt period")
|
||||
}
|
||||
|
||||
info.CPURealtimeRuntime = cgroupEnabled(mountPoint, "cpu.rt_runtime_us")
|
||||
if !info.CPURealtimeRuntime {
|
||||
warnings = append(warnings, "Your kernel does not support cgroup rt runtime")
|
||||
}
|
||||
|
||||
return warnings
|
||||
}
|
||||
|
||||
// applyBlkioCgroupInfo reads the blkio information from the blkio cgroup mount point.
|
||||
func applyBlkioCgroupInfo(info *SysInfo, cgMounts map[string]string) []string {
|
||||
var warnings []string
|
||||
mountPoint, ok := cgMounts["blkio"]
|
||||
if !ok {
|
||||
warnings = append(warnings, "Unable to find blkio cgroup in mounts")
|
||||
return warnings
|
||||
}
|
||||
|
||||
info.BlkioWeight = cgroupEnabled(mountPoint, "blkio.weight")
|
||||
if !info.BlkioWeight {
|
||||
warnings = append(warnings, "Your kernel does not support cgroup blkio weight")
|
||||
}
|
||||
|
||||
info.BlkioWeightDevice = cgroupEnabled(mountPoint, "blkio.weight_device")
|
||||
if !info.BlkioWeightDevice {
|
||||
warnings = append(warnings, "Your kernel does not support cgroup blkio weight_device")
|
||||
}
|
||||
|
||||
info.BlkioReadBpsDevice = cgroupEnabled(mountPoint, "blkio.throttle.read_bps_device")
|
||||
if !info.BlkioReadBpsDevice {
|
||||
warnings = append(warnings, "Your kernel does not support cgroup blkio throttle.read_bps_device")
|
||||
}
|
||||
|
||||
info.BlkioWriteBpsDevice = cgroupEnabled(mountPoint, "blkio.throttle.write_bps_device")
|
||||
if !info.BlkioWriteBpsDevice {
|
||||
warnings = append(warnings, "Your kernel does not support cgroup blkio throttle.write_bps_device")
|
||||
}
|
||||
info.BlkioReadIOpsDevice = cgroupEnabled(mountPoint, "blkio.throttle.read_iops_device")
|
||||
if !info.BlkioReadIOpsDevice {
|
||||
warnings = append(warnings, "Your kernel does not support cgroup blkio throttle.read_iops_device")
|
||||
}
|
||||
|
||||
info.BlkioWriteIOpsDevice = cgroupEnabled(mountPoint, "blkio.throttle.write_iops_device")
|
||||
if !info.BlkioWriteIOpsDevice {
|
||||
warnings = append(warnings, "Your kernel does not support cgroup blkio throttle.write_iops_device")
|
||||
}
|
||||
|
||||
return warnings
|
||||
}
|
||||
|
||||
// applyCPUSetCgroupInfo reads the cpuset information from the cpuset cgroup mount point.
|
||||
func applyCPUSetCgroupInfo(info *SysInfo, cgMounts map[string]string) []string {
|
||||
var warnings []string
|
||||
mountPoint, ok := cgMounts["cpuset"]
|
||||
if !ok {
|
||||
warnings = append(warnings, "Unable to find cpuset cgroup in mounts")
|
||||
return warnings
|
||||
}
|
||||
info.Cpuset = ok
|
||||
|
||||
var err error
|
||||
|
||||
cpus, err := ioutil.ReadFile(path.Join(mountPoint, "cpuset.cpus"))
|
||||
if err != nil {
|
||||
return warnings
|
||||
}
|
||||
info.Cpus = strings.TrimSpace(string(cpus))
|
||||
|
||||
mems, err := ioutil.ReadFile(path.Join(mountPoint, "cpuset.mems"))
|
||||
if err != nil {
|
||||
return warnings
|
||||
}
|
||||
info.Mems = strings.TrimSpace(string(mems))
|
||||
|
||||
return warnings
|
||||
}
|
||||
|
||||
// applyPIDSCgroupInfo reads the pids information from the pids cgroup mount point.
|
||||
func applyPIDSCgroupInfo(info *SysInfo, _ map[string]string) []string {
|
||||
var warnings []string
|
||||
_, err := cgroups.FindCgroupMountpoint("", "pids")
|
||||
if err != nil {
|
||||
warnings = append(warnings, err.Error())
|
||||
return warnings
|
||||
}
|
||||
info.PidsLimit = true
|
||||
return warnings
|
||||
}
|
||||
|
||||
// applyDevicesCgroupInfo reads the pids information from the devices cgroup mount point.
|
||||
func applyDevicesCgroupInfo(info *SysInfo, cgMounts map[string]string) []string {
|
||||
var warnings []string
|
||||
_, ok := cgMounts["devices"]
|
||||
sysInfo.CgroupDevicesEnabled = ok
|
||||
info.CgroupDevicesEnabled = ok
|
||||
return warnings
|
||||
}
|
||||
|
||||
sysInfo.IPv4ForwardingDisabled = !readProcBool("/proc/sys/net/ipv4/ip_forward")
|
||||
sysInfo.BridgeNFCallIPTablesDisabled = !readProcBool("/proc/sys/net/bridge/bridge-nf-call-iptables")
|
||||
sysInfo.BridgeNFCallIP6TablesDisabled = !readProcBool("/proc/sys/net/bridge/bridge-nf-call-ip6tables")
|
||||
// applyNetworkingInfo adds networking information to the info.
|
||||
func applyNetworkingInfo(info *SysInfo, _ map[string]string) []string {
|
||||
var warnings []string
|
||||
info.IPv4ForwardingDisabled = !readProcBool("/proc/sys/net/ipv4/ip_forward")
|
||||
info.BridgeNFCallIPTablesDisabled = !readProcBool("/proc/sys/net/bridge/bridge-nf-call-iptables")
|
||||
info.BridgeNFCallIP6TablesDisabled = !readProcBool("/proc/sys/net/bridge/bridge-nf-call-ip6tables")
|
||||
return warnings
|
||||
}
|
||||
|
||||
// Check if AppArmor is supported.
|
||||
// applyAppArmorInfo adds AppArmor information to the info.
|
||||
func applyAppArmorInfo(info *SysInfo, _ map[string]string) []string {
|
||||
var warnings []string
|
||||
if _, err := os.Stat("/sys/kernel/security/apparmor"); !os.IsNotExist(err) {
|
||||
if _, err := ioutil.ReadFile("/sys/kernel/security/apparmor/profiles"); err == nil {
|
||||
sysInfo.AppArmor = true
|
||||
info.AppArmor = true
|
||||
}
|
||||
}
|
||||
return warnings
|
||||
}
|
||||
|
||||
// applySeccompInfo checks if Seccomp is supported, via CONFIG_SECCOMP.
|
||||
func applySeccompInfo(info *SysInfo, _ map[string]string) []string {
|
||||
var warnings []string
|
||||
// Check if Seccomp is supported, via CONFIG_SECCOMP.
|
||||
if err := unix.Prctl(unix.PR_GET_SECCOMP, 0, 0, 0, 0); err != unix.EINVAL {
|
||||
// Make sure the kernel has CONFIG_SECCOMP_FILTER.
|
||||
if err := unix.Prctl(unix.PR_SET_SECCOMP, unix.SECCOMP_MODE_FILTER, 0, 0, 0); err != unix.EINVAL {
|
||||
sysInfo.Seccomp = true
|
||||
info.Seccomp = true
|
||||
}
|
||||
}
|
||||
|
||||
return sysInfo
|
||||
}
|
||||
|
||||
// checkCgroupMem reads the memory information from the memory cgroup mount point.
|
||||
func checkCgroupMem(cgMounts map[string]string, quiet bool) cgroupMemInfo {
|
||||
mountPoint, ok := cgMounts["memory"]
|
||||
if !ok {
|
||||
if !quiet {
|
||||
logrus.Warn("Your kernel does not support cgroup memory limit")
|
||||
}
|
||||
return cgroupMemInfo{}
|
||||
}
|
||||
|
||||
swapLimit := cgroupEnabled(mountPoint, "memory.memsw.limit_in_bytes")
|
||||
if !quiet && !swapLimit {
|
||||
logrus.Warn("Your kernel does not support swap memory limit")
|
||||
}
|
||||
memoryReservation := cgroupEnabled(mountPoint, "memory.soft_limit_in_bytes")
|
||||
if !quiet && !memoryReservation {
|
||||
logrus.Warn("Your kernel does not support memory reservation")
|
||||
}
|
||||
oomKillDisable := cgroupEnabled(mountPoint, "memory.oom_control")
|
||||
if !quiet && !oomKillDisable {
|
||||
logrus.Warn("Your kernel does not support oom control")
|
||||
}
|
||||
memorySwappiness := cgroupEnabled(mountPoint, "memory.swappiness")
|
||||
if !quiet && !memorySwappiness {
|
||||
logrus.Warn("Your kernel does not support memory swappiness")
|
||||
}
|
||||
kernelMemory := cgroupEnabled(mountPoint, "memory.kmem.limit_in_bytes")
|
||||
if !quiet && !kernelMemory {
|
||||
logrus.Warn("Your kernel does not support kernel memory limit")
|
||||
}
|
||||
kernelMemoryTCP := cgroupEnabled(mountPoint, "memory.kmem.tcp.limit_in_bytes")
|
||||
if !quiet && !kernelMemoryTCP {
|
||||
logrus.Warn("Your kernel does not support kernel memory TCP limit")
|
||||
}
|
||||
|
||||
return cgroupMemInfo{
|
||||
MemoryLimit: true,
|
||||
SwapLimit: swapLimit,
|
||||
MemoryReservation: memoryReservation,
|
||||
OomKillDisable: oomKillDisable,
|
||||
MemorySwappiness: memorySwappiness,
|
||||
KernelMemory: kernelMemory,
|
||||
KernelMemoryTCP: kernelMemoryTCP,
|
||||
}
|
||||
}
|
||||
|
||||
// checkCgroupCPU reads the cpu information from the cpu cgroup mount point.
|
||||
func checkCgroupCPU(cgMounts map[string]string, quiet bool) cgroupCPUInfo {
|
||||
mountPoint, ok := cgMounts["cpu"]
|
||||
if !ok {
|
||||
if !quiet {
|
||||
logrus.Warn("Unable to find cpu cgroup in mounts")
|
||||
}
|
||||
return cgroupCPUInfo{}
|
||||
}
|
||||
|
||||
cpuShares := cgroupEnabled(mountPoint, "cpu.shares")
|
||||
if !quiet && !cpuShares {
|
||||
logrus.Warn("Your kernel does not support cgroup cpu shares")
|
||||
}
|
||||
|
||||
cpuCfsPeriod := cgroupEnabled(mountPoint, "cpu.cfs_period_us")
|
||||
if !quiet && !cpuCfsPeriod {
|
||||
logrus.Warn("Your kernel does not support cgroup cfs period")
|
||||
}
|
||||
|
||||
cpuCfsQuota := cgroupEnabled(mountPoint, "cpu.cfs_quota_us")
|
||||
if !quiet && !cpuCfsQuota {
|
||||
logrus.Warn("Your kernel does not support cgroup cfs quotas")
|
||||
}
|
||||
|
||||
cpuRealtimePeriod := cgroupEnabled(mountPoint, "cpu.rt_period_us")
|
||||
if !quiet && !cpuRealtimePeriod {
|
||||
logrus.Warn("Your kernel does not support cgroup rt period")
|
||||
}
|
||||
|
||||
cpuRealtimeRuntime := cgroupEnabled(mountPoint, "cpu.rt_runtime_us")
|
||||
if !quiet && !cpuRealtimeRuntime {
|
||||
logrus.Warn("Your kernel does not support cgroup rt runtime")
|
||||
}
|
||||
|
||||
return cgroupCPUInfo{
|
||||
CPUShares: cpuShares,
|
||||
CPUCfsPeriod: cpuCfsPeriod,
|
||||
CPUCfsQuota: cpuCfsQuota,
|
||||
CPURealtimePeriod: cpuRealtimePeriod,
|
||||
CPURealtimeRuntime: cpuRealtimeRuntime,
|
||||
}
|
||||
}
|
||||
|
||||
// checkCgroupBlkioInfo reads the blkio information from the blkio cgroup mount point.
|
||||
func checkCgroupBlkioInfo(cgMounts map[string]string, quiet bool) cgroupBlkioInfo {
|
||||
mountPoint, ok := cgMounts["blkio"]
|
||||
if !ok {
|
||||
if !quiet {
|
||||
logrus.Warn("Unable to find blkio cgroup in mounts")
|
||||
}
|
||||
return cgroupBlkioInfo{}
|
||||
}
|
||||
|
||||
weight := cgroupEnabled(mountPoint, "blkio.weight")
|
||||
if !quiet && !weight {
|
||||
logrus.Warn("Your kernel does not support cgroup blkio weight")
|
||||
}
|
||||
|
||||
weightDevice := cgroupEnabled(mountPoint, "blkio.weight_device")
|
||||
if !quiet && !weightDevice {
|
||||
logrus.Warn("Your kernel does not support cgroup blkio weight_device")
|
||||
}
|
||||
|
||||
readBpsDevice := cgroupEnabled(mountPoint, "blkio.throttle.read_bps_device")
|
||||
if !quiet && !readBpsDevice {
|
||||
logrus.Warn("Your kernel does not support cgroup blkio throttle.read_bps_device")
|
||||
}
|
||||
|
||||
writeBpsDevice := cgroupEnabled(mountPoint, "blkio.throttle.write_bps_device")
|
||||
if !quiet && !writeBpsDevice {
|
||||
logrus.Warn("Your kernel does not support cgroup blkio throttle.write_bps_device")
|
||||
}
|
||||
readIOpsDevice := cgroupEnabled(mountPoint, "blkio.throttle.read_iops_device")
|
||||
if !quiet && !readIOpsDevice {
|
||||
logrus.Warn("Your kernel does not support cgroup blkio throttle.read_iops_device")
|
||||
}
|
||||
|
||||
writeIOpsDevice := cgroupEnabled(mountPoint, "blkio.throttle.write_iops_device")
|
||||
if !quiet && !writeIOpsDevice {
|
||||
logrus.Warn("Your kernel does not support cgroup blkio throttle.write_iops_device")
|
||||
}
|
||||
return cgroupBlkioInfo{
|
||||
BlkioWeight: weight,
|
||||
BlkioWeightDevice: weightDevice,
|
||||
BlkioReadBpsDevice: readBpsDevice,
|
||||
BlkioWriteBpsDevice: writeBpsDevice,
|
||||
BlkioReadIOpsDevice: readIOpsDevice,
|
||||
BlkioWriteIOpsDevice: writeIOpsDevice,
|
||||
}
|
||||
}
|
||||
|
||||
// checkCgroupCpusetInfo reads the cpuset information from the cpuset cgroup mount point.
|
||||
func checkCgroupCpusetInfo(cgMounts map[string]string, quiet bool) cgroupCpusetInfo {
|
||||
mountPoint, ok := cgMounts["cpuset"]
|
||||
if !ok {
|
||||
if !quiet {
|
||||
logrus.Warn("Unable to find cpuset cgroup in mounts")
|
||||
}
|
||||
return cgroupCpusetInfo{}
|
||||
}
|
||||
|
||||
cpus, err := ioutil.ReadFile(path.Join(mountPoint, "cpuset.cpus"))
|
||||
if err != nil {
|
||||
return cgroupCpusetInfo{}
|
||||
}
|
||||
|
||||
mems, err := ioutil.ReadFile(path.Join(mountPoint, "cpuset.mems"))
|
||||
if err != nil {
|
||||
return cgroupCpusetInfo{}
|
||||
}
|
||||
|
||||
return cgroupCpusetInfo{
|
||||
Cpuset: true,
|
||||
Cpus: strings.TrimSpace(string(cpus)),
|
||||
Mems: strings.TrimSpace(string(mems)),
|
||||
}
|
||||
}
|
||||
|
||||
// checkCgroupPids reads the pids information from the pids cgroup mount point.
|
||||
func checkCgroupPids(quiet bool) cgroupPids {
|
||||
_, err := cgroups.FindCgroupMountpoint("", "pids")
|
||||
if err != nil {
|
||||
if !quiet {
|
||||
logrus.Warn(err)
|
||||
}
|
||||
return cgroupPids{}
|
||||
}
|
||||
|
||||
return cgroupPids{
|
||||
PidsLimit: true,
|
||||
}
|
||||
return warnings
|
||||
}
|
||||
|
||||
func cgroupEnabled(mountPoint, name string) bool {
|
||||
|
|
|
|||
Loading…
Reference in a new issue