mirror of
https://github.com/containers/podman.git
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70 lines
1.8 KiB
Go
70 lines
1.8 KiB
Go
package config
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import (
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"fmt"
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"os"
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"strconv"
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"strings"
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"golang.org/x/sys/unix"
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)
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const (
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oldMaxSize = uint64(1048576)
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)
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func getDefaultCgroupsMode() string {
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return "enabled"
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}
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// getDefaultProcessLimits returns the nproc for the current process in ulimits format
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// Note that nfile sometimes cannot be set to unlimited, and the limit is hardcoded
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// to (oldMaxSize) 1048576 (2^20), see: http://stackoverflow.com/a/1213069/1811501
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// In rootless containers this will fail, and the process will just use its current limits
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func getDefaultProcessLimits() []string {
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rlim := unix.Rlimit{Cur: oldMaxSize, Max: oldMaxSize}
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oldrlim := rlim
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// Attempt to set file limit and process limit to pid_max in OS
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dat, err := os.ReadFile("/proc/sys/kernel/pid_max")
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if err == nil {
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val := strings.TrimSuffix(string(dat), "\n")
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max, err := strconv.ParseUint(val, 10, 64)
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if err == nil {
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rlim = unix.Rlimit{Cur: max, Max: max}
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}
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}
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defaultLimits := []string{}
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if err := unix.Setrlimit(unix.RLIMIT_NPROC, &rlim); err == nil {
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defaultLimits = append(defaultLimits, fmt.Sprintf("nproc=%d:%d", rlim.Cur, rlim.Max))
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} else if err := unix.Setrlimit(unix.RLIMIT_NPROC, &oldrlim); err == nil {
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defaultLimits = append(defaultLimits, fmt.Sprintf("nproc=%d:%d", oldrlim.Cur, oldrlim.Max))
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}
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return defaultLimits
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}
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// getDefaultTmpDir for linux
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func getDefaultTmpDir() string {
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// first check the TMPDIR env var
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if path, found := os.LookupEnv("TMPDIR"); found {
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return path
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}
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return "/var/tmp"
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}
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func getDefaultLockType() string {
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return "shm"
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}
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func getLibpodTmpDir() string {
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return "/run/libpod"
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}
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// getDefaultMachineVolumes returns default mounted volumes (possibly with env vars, which will be expanded)
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func getDefaultMachineVolumes() []string {
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return []string{"$HOME:$HOME"}
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}
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func getDefaultComposeProviders() []string {
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return defaultUnixComposeProviders
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}
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