headscale/integration/dockertestutil/config.go

package dockertestutil

import (
	"os"

	"github.com/ory/dockertest/v3/docker"
)

func IsRunningInContainer() bool {
	if _, err := os.Stat("/.dockerenv"); err != nil {
		return false
	}

	return true
}

func DockerRestartPolicy(config *docker.HostConfig) {
	// set AutoRemove to true so that stopped container goes away by itself on error *immediately*.
	// when set to false, containers remain until the end of the integration test.
	config.AutoRemove = false
	config.RestartPolicy = docker.RestartPolicy{
		Name: "no",
	}
}

func DockerAllowLocalIPv6(config *docker.HostConfig) {
	if config.Sysctls == nil {
		config.Sysctls = make(map[string]string, 1)
	}
	config.Sysctls["net.ipv6.conf.all.disable_ipv6"] = "0"
}

func DockerAllowNetworkAdministration(config *docker.HostConfig) {
	config.CapAdd = append(config.CapAdd, "NET_ADMIN")
	config.Mounts = append(config.Mounts, docker.HostMount{
		Type:   "bind",
		Source: "/dev/net/tun",
		Target: "/dev/net/tun",
	})
}