mirror of
https://github.com/containers/podman.git
synced 2025-08-06 11:32:07 +08:00
e596b17fbe
**podman compose** is a thin wrapper around an external compose provider such as docker-compose or podman-compose. This means that `podman compose` is executing another tool that implements the compose functionality but sets up the environment in a way to let the compose provider communicate transparently with the local Podman socket. The specified options as well the command and argument are passed directly to the compose provider. The default compose providers are `docker-compose` and `podman-compose`. If installed, `docker-compose` takes precedence since it is the original implementation of the Compose specification and is widely used on the supported platforms (i.e., Linux, Mac OS, Windows). If you want to change the default behavior or have a custom installation path for your provider of choice, please change the `compose_provider` field in `containers.conf(5)`. You may also set the `PODMAN_COMPOSE_PROVIDER` environment variable. Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>
81 lines
2.2 KiB
Go
81 lines
2.2 KiB
Go
package config
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
const (
|
|
oldMaxSize = uint64(1048576)
|
|
)
|
|
|
|
func getDefaultCgroupsMode() string {
|
|
return "enabled"
|
|
}
|
|
|
|
// getDefaultMachineImage returns the default machine image stream
|
|
// On Linux/Mac, this returns the FCOS stream
|
|
func getDefaultMachineImage() string {
|
|
return "testing"
|
|
}
|
|
|
|
// getDefaultMachineUser returns the user to use for rootless podman
|
|
func getDefaultMachineUser() string {
|
|
return "core"
|
|
}
|
|
|
|
// getDefaultProcessLimits returns the nproc for the current process in ulimits format
|
|
// Note that nfile sometimes cannot be set to unlimited, and the limit is hardcoded
|
|
// to (oldMaxSize) 1048576 (2^20), see: http://stackoverflow.com/a/1213069/1811501
|
|
// In rootless containers this will fail, and the process will just use its current limits
|
|
func getDefaultProcessLimits() []string {
|
|
rlim := unix.Rlimit{Cur: oldMaxSize, Max: oldMaxSize}
|
|
oldrlim := rlim
|
|
// Attempt to set file limit and process limit to pid_max in OS
|
|
dat, err := os.ReadFile("/proc/sys/kernel/pid_max")
|
|
if err == nil {
|
|
val := strings.TrimSuffix(string(dat), "\n")
|
|
max, err := strconv.ParseUint(val, 10, 64)
|
|
if err == nil {
|
|
rlim = unix.Rlimit{Cur: uint64(max), Max: uint64(max)}
|
|
}
|
|
}
|
|
defaultLimits := []string{}
|
|
if err := unix.Setrlimit(unix.RLIMIT_NPROC, &rlim); err == nil {
|
|
defaultLimits = append(defaultLimits, fmt.Sprintf("nproc=%d:%d", rlim.Cur, rlim.Max))
|
|
} else if err := unix.Setrlimit(unix.RLIMIT_NPROC, &oldrlim); err == nil {
|
|
defaultLimits = append(defaultLimits, fmt.Sprintf("nproc=%d:%d", oldrlim.Cur, oldrlim.Max))
|
|
}
|
|
return defaultLimits
|
|
}
|
|
|
|
// getDefaultTmpDir for linux
|
|
func getDefaultTmpDir() string {
|
|
// first check the TMPDIR env var
|
|
if path, found := os.LookupEnv("TMPDIR"); found {
|
|
return path
|
|
}
|
|
return "/var/tmp"
|
|
}
|
|
|
|
func getDefaultLockType() string {
|
|
return "shm"
|
|
}
|
|
|
|
func getLibpodTmpDir() string {
|
|
return "/run/libpod"
|
|
}
|
|
|
|
// getDefaultMachineVolumes returns default mounted volumes (possibly with env vars, which will be expanded)
|
|
func getDefaultMachineVolumes() []string {
|
|
return []string{"$HOME:$HOME"}
|
|
}
|
|
|
|
func getDefaultComposeProviders() []string {
|
|
return defaultUnixComposeProviders
|
|
}
|