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138 lines
4.0 KiB
Go
138 lines
4.0 KiB
Go
// Package sysinfo stores information about which features a kernel supports.
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package sysinfo
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// Opt for New().
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type Opt func(info *SysInfo)
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// SysInfo stores information about which features a kernel supports.
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// TODO Windows: Factor out platform specific capabilities.
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type SysInfo struct {
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// Whether the kernel supports AppArmor or not
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AppArmor bool
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// Whether the kernel supports Seccomp or not
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Seccomp bool
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cgroupMemInfo
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cgroupCPUInfo
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cgroupBlkioInfo
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cgroupCpusetInfo
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cgroupPids
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// Whether the kernel supports cgroup namespaces or not
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CgroupNamespaces bool
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// Whether IPv4 forwarding is supported or not, if this was disabled, networking will not work
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IPv4ForwardingDisabled bool
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// Whether the cgroup has the mountpoint of "devices" or not
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CgroupDevicesEnabled bool
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// Whether the cgroup is in unified mode (v2).
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CgroupUnified bool
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// Warnings contains a slice of warnings that occurred while collecting
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// system information. These warnings are intended to be informational
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// messages for the user, and can either be logged or returned to the
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// client; they are not intended to be parsed / used for other purposes,
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// and do not have a fixed format.
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Warnings []string
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// cgMounts is the list of cgroup v1 mount paths, indexed by subsystem, to
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// inspect availability of subsystems.
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cgMounts map[string]string
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// cg2GroupPath is the cgroup v2 group path to inspect availability of the controllers.
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cg2GroupPath string
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// cg2Controllers is an index of available cgroup v2 controllers.
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cg2Controllers map[string]struct{}
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}
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type cgroupMemInfo struct {
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// Whether memory limit is supported or not
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MemoryLimit bool
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// Whether swap limit is supported or not
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SwapLimit bool
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// Whether soft limit is supported or not
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MemoryReservation bool
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// Whether OOM killer disable is supported or not
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OomKillDisable bool
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// Whether memory swappiness is supported or not
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MemorySwappiness bool
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}
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type cgroupCPUInfo struct {
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// Whether CPU shares is supported or not
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CPUShares bool
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// Whether CPU CFS (Completely Fair Scheduler) is supported
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CPUCfs bool
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// Whether CPU real-time scheduler is supported
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CPURealtime bool
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}
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type cgroupBlkioInfo struct {
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// Whether Block IO weight is supported or not
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BlkioWeight bool
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// Whether Block IO weight_device is supported or not
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BlkioWeightDevice bool
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// Whether Block IO read limit in bytes per second is supported or not
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BlkioReadBpsDevice bool
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// Whether Block IO write limit in bytes per second is supported or not
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BlkioWriteBpsDevice bool
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// Whether Block IO read limit in IO per second is supported or not
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BlkioReadIOpsDevice bool
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// Whether Block IO write limit in IO per second is supported or not
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BlkioWriteIOpsDevice bool
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}
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type cgroupCpusetInfo struct {
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// Whether Cpuset is supported or not
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Cpuset bool
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// Available Cpuset's cpus as read from "cpuset.cpus.effective" (cgroups v2)
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// or "cpuset.cpus" (cgroups v1).
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Cpus string
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// CPUSets holds the list of available cpusets parsed from "cpuset.cpus.effective" (cgroups v2)
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// or "cpuset.cpus" (cgroups v1).
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CPUSets map[int]struct{}
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// Available Cpuset's memory nodes as read from "cpuset.mems.effective" (cgroups v2)
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// or "cpuset.mems" (cgroups v1).
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Mems string
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// MemSets holds the list of available cpusets parsed from "cpuset.mems.effective" (cgroups v2)
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// or "cpuset.mems" (cgroups v1).
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MemSets map[int]struct{}
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}
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type cgroupPids struct {
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// Whether Pids Limit is supported or not
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PidsLimit bool
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}
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// IsCpusetCpusAvailable returns `true` if the provided string set is contained
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// in cgroup's cpuset.cpus set, `false` otherwise.
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// If error is not nil a parsing error occurred.
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func (c cgroupCpusetInfo) IsCpusetCpusAvailable(requested string) (bool, error) {
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return isCpusetListAvailable(requested, c.CPUSets)
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}
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// IsCpusetMemsAvailable returns `true` if the provided string set is contained
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// in cgroup's cpuset.mems set, `false` otherwise.
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// If error is not nil a parsing error occurred.
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func (c cgroupCpusetInfo) IsCpusetMemsAvailable(requested string) (bool, error) {
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return isCpusetListAvailable(requested, c.MemSets)
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}
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