lbacik

<?php

declare(strict_types=1);

namespace ValueObjectTest;

use Sushi\ValueObject;

class PersonValueObject extends ValueObject
{

lbacik

FROM debian:sid

RUN echo 'deb http://deb.debian.org/debian stretch main' >> /etc/apt/sources.list \
  && apt-get -y update && apt-get -y install \
    php-parser=1.4.1-2 \
    php7cc

WORKDIR /root

lbacik

$ ip link
$ ip route

$ sudo ip link add ve0 type veth peer name ve1

$ sudo ip address add 10.10.10.10/24 dev ve0
$ sudo ip link set ve0 up
$ sudo ip l s ve1 up

lbacik

$ sudo unshare -p
-bash: fork: Cannot allocate memory
# link to the explanation

$ sudo unshare -p -f

$ ps ax

$ echo $$

lbacik

hostname
# result: debian

unshare -u 

# --- within UTS namespace

hostname
# result: debian

lbacik

# localization of test filesystem - please change the ROOTPATH placeholder appropriately
export CONTAINER_FS=ROOTPATH/containers/debian_fs

# UNSHARE
sudo unshare -m chroot $CONTAINER_FS

# --- within chroot
mount -t proc proc /proc
ls /proc

lbacik

# localization of test filesystem - please change the ROOTPATH placeholder appropriately
export CONTAINER_FS=ROOTPATH/containers/debian_fs

sudo chroot $CONTAINER_FS

# --- within chroot
ps 
# above will caused the error:
# Error, do this: mount -t proc proc /proc

lbacik

# localization of test filesystem - please change the ROOTPATH placeholder appropriately
export CONTAINER_FS=ROOTPATH/containers/debian_fs

# preparing filesystem
mkdir -p $CONTAINER_FS
sudo debootstrap stretch $CONTAINER_FS

# let's mark this filesystem
touch $CONTAINER_FS/CONTAINER_FS