def contain(command, image_name, image_dir, container_id, container_dir,
cpu_shares, memory, memory_swap):
_setup_cpu_cgroup(container_id, cpu_shares)
_setup_memory_cgroup(container_id, memory, memory_swap)
# TODO: similarly to the CPU cgorup, add Memory cgroup support here
# setup memory -> memory.limit_in_bytes,
# memory_swap -> memory.memsw.limit_in_bytes if they are not None
linux.sethostname(container_id) # Change hostname to container_id
linux.mount(None, '/', None, linux.MS_PRIVATE | linux.MS_REC, None)
new_root = create_container_root(image_name, image_dir, container_id,
container_dir)
print('Created a new root fs for our container: {}'.format(new_root))
_create_mounts(new_root)
old_root = os.path.join(new_root, 'old_root')
os.makedirs(old_root)
linux.pivot_root(new_root, old_root)
os.chdir('/')
linux.umount2('/old_root', linux.MNT_DETACH) # umount old root
os.rmdir('/old_root') # rmdir the old_root dir
os.execvp(command[0], command)
def contain(command, image_name, image_dir, container_id, container_dir,
cpu_shares):
# TODO: insert the container to a new cpu cgroup named:
# 'rubber_docker/container_id'
_setup_cpu_cgroup(container_id, cpu_shares)
# TODO: if (cpu_shares != 0) => set the 'cpu.shares' in our cpu cgroup
linux.sethostname(container_id) # change hostname to container_id
linux.mount(None, '/', None, linux.MS_PRIVATE | linux.MS_REC, None)
new_root = create_container_root(image_name, image_dir, container_id,
container_dir)
print('Created a new root fs for our container: {}'.format(new_root))
_create_mounts(new_root)
old_root = os.path.join(new_root, 'old_root')
os.makedirs(old_root)
linux.pivot_root(new_root, old_root)
os.chdir('/')
linux.umount2('/old_root', linux.MNT_DETACH) # umount old root
os.rmdir('/old_root') # rmdir the old_root dir
os.execvp(command[0], command)
def contain(command, image_name, image_dir, container_id, container_dir,
cpu_shares, memory, memory_swap, user):
_setup_cpu_cgroup(container_id, cpu_shares)
_setup_memory_cgroup(container_id, memory, memory_swap)
linux.sethostname(container_id) # change hostname to container_id
linux.mount(None, '/', None, linux.MS_PRIVATE | linux.MS_REC, None)
new_root = create_container_root(image_name, image_dir, container_id,
container_dir)
print('Created a new root fs for our container: {}'.format(new_root))
_create_mounts(new_root)
old_root = os.path.join(new_root, 'old_root')
os.makedirs(old_root)
linux.pivot_root(new_root, old_root)
os.chdir('/')
linux.umount2('/old_root', linux.MNT_DETACH) # umount old root
os.rmdir('/old_root') # rmdir the old_root dir
# TODO: if user is set, drop privileges using os.setuid()
# (and optionally os.setgid()).
os.execvp(command[0], command)
def contain(command, image_name, image_dir, container_id, container_dir,
cpu_shares, memory, memory_swap, user):
_setup_cpu_cgroup(container_id, cpu_shares)
_setup_memory_cgroup(container_id, memory, memory_swap)
linux.sethostname(container_id) # change hostname to container_id
linux.mount(None, '/', None, linux.MS_PRIVATE | linux.MS_REC, None)
new_root = create_container_root(
image_name, image_dir, container_id, container_dir)
print('Created a new root fs for our container: {}'.format(new_root))
_create_mounts(new_root)
old_root = os.path.join(new_root, 'old_root')
os.makedirs(old_root)
linux.pivot_root(new_root, old_root)
os.chdir('/')
linux.umount2('/old_root', linux.MNT_DETACH) # umount old root
os.rmdir('/old_root') # rmdir the old_root dir
# TODO: if user is set, drop privileges using os.setuid()
# (and optionally os.setgid()).
os.execvp(command[0], command)
def contain(command, image_name, image_dir, container_id, container_dir,
cpu_shares):
# TODO: insert the container to a new cpu cgroup named:
# 'rubber_docker/container_id'
# TODO: if (cpu_shares != 0) => set the 'cpu.shares' in our cpu cgroup
linux.sethostname(container_id) # change hostname to container_id
linux.mount(None, '/', None, linux.MS_PRIVATE | linux.MS_REC, None)
new_root = create_container_root(
image_name, image_dir, container_id, container_dir)
print('Created a new root fs for our container: {}'.format(new_root))
_create_mounts(new_root)
old_root = os.path.join(new_root, 'old_root')
os.makedirs(old_root)
linux.pivot_root(new_root, old_root)
os.chdir('/')
linux.umount2('/old_root', linux.MNT_DETACH) # umount old root
os.rmdir('/old_root') # rmdir the old_root dir
os.execvp(command[0], command)
def contain(command, image_name, image_dir, container_id, container_dir,
cpu_shares, memory, memory_swap):
_setup_cpu_cgroup(container_id, cpu_shares)
# TODO: similarly to the CPU cgorup, add Memory cgroup support here
# setup memory -> memory.limit_in_bytes,
# memory_swap -> memory.memsw.limit_in_bytes if they are not None
linux.sethostname(container_id) # Change hostname to container_id
linux.mount(None, '/', None, linux.MS_PRIVATE | linux.MS_REC, None)
new_root = create_container_root(
image_name, image_dir, container_id, container_dir)
print('Created a new root fs for our container: {}'.format(new_root))
_create_mounts(new_root)
old_root = os.path.join(new_root, 'old_root')
os.makedirs(old_root)
linux.pivot_root(new_root, old_root)
os.chdir('/')
linux.umount2('/old_root', linux.MNT_DETACH) # umount old root
os.rmdir('/old_root') # rmdir the old_root dir
os.execvp(command[0], command)
def contain(command, image_name, image_dir, container_id, container_dir):
linux.unshare(linux.CLONE_NEWNS) # create a new mount namespace
# TODO: switch to a new UTS namespace, change hostname to container_id
# HINT: use linux.sethostname()
linux.unshare(linux.CLONE_NEWUTS)
linux.sethostname(container_id)
linux.mount(None, '/', None, linux.MS_PRIVATE | linux.MS_REC, None)
new_root = create_container_root(image_name, image_dir, container_id,
container_dir)
print('Created a new root fs for our container: {}'.format(new_root))
_create_mounts(new_root)
old_root = os.path.join(new_root, 'old_root')
os.makedirs(old_root)
linux.pivot_root(new_root, old_root)
os.chdir('/')
linux.umount2('/old_root', linux.MNT_DETACH) # umount old root
os.rmdir('/old_root') # rmdir the old_root dir
os.execvp(command[0], command)
def contain(command, image_name, image_dir, container_id, container_dir):
linux.sethostname(container_id) # change hostname to container_id
linux.mount(None, '/', None, linux.MS_PRIVATE | linux.MS_REC, None)
new_root = create_container_root(image_name, image_dir, container_id, container_dir)
print('Created a new root fs for our container: {}'.format(new_root))
_create_mounts(new_root)
old_root = os.path.join(new_root, 'old_root')
os.makedirs(old_root)
linux.pivot_root(new_root, old_root)
os.chdir('/')
linux.umount2('/old_root', linux.MNT_DETACH) # umount old root
os.execvp(command[0], command)
def contain(command, image_name, image_dir, container_id, container_dir):
linux.sethostname(container_id) # change hostname to container_id
linux.mount(None, "/", None, linux.MS_PRIVATE | linux.MS_REC, None)
new_root = create_container_root(image_name, image_dir, container_id, container_dir)
print("Created a new root fs for our container: {}".format(new_root))
_create_mounts(new_root)
old_root = os.path.join(new_root, "old_root")
os.makedirs(old_root)
linux.pivot_root(new_root, old_root)
os.chdir("/")
linux.umount2("/old_root", linux.MNT_DETACH) # umount old root
os.rmdir("/old_root") # rmdir the old_root dir
os.execvp(command[0], command)
def contain(cmd, cid):
_set_cgroup_cpu(cid)
_set_cgroup_memory(cid)
linux.unshare(linux.CLONE_NEWNS) # create a new mount namespace
linux.unshare(linux.CLONE_NEWUTS) # create a new uts namespace
linux.unshare(linux.CLONE_NEWNET) # create a new n/w namespace
linux.sethostname(cid)
# Use linux.clone in run() before fork and uncomment the above lines
linux.mount(None, '/', None, linux.MS_REC | linux.MS_PRIVATE, None)
new_root = create_container_root()
print("New Root created.")
# When using an already extracted image
# linux.umount(os.path.join(new_root, 'proc'))
# linux.umount(os.path.join(new_root, 'sys'))
linux.mount('proc', os.path.join(new_root, 'proc'), 'proc', 0, '')
linux.mount('sysfs', os.path.join(new_root, 'sys'), 'sysfs', 0, '')
linux.mount('tmpfs', os.path.join(new_root, 'dev'), 'tmpfs',
linux.MS_STRICTATIME | linux.MS_NOSUID, 'mode=755')
# Add Basic Devices
devs = os.path.join(new_root, 'dev', 'pts')
if os.path.exists:
pass
else:
os.makedirs(devs)
linux.mount('devpts', devs, 'devpts', 0, '')
_makedev(os.path.join(new_root, 'dev'))
os.chroot(new_root)
os.chdir("/")
os.execvp(cmd[0], cmd)
def execute(self, init_params: ContainerInitParams):
"""
指定されたパラメータでコンテナを起動する
:param init_params:
:return:
"""
# ホスト名をコンテナ ID にする
linux.sethostname(init_params.container_id)
# ホストのマウントテーブルを汚さないように / をプライベートマウントする
linux.mount(None, '/', None, linux.MS_PRIVATE | linux.MS_REC, None)
# コンテナのディレクトリを初期化し、ルートディレクトリを変更する
container_dir = self._create_container_root_dir(
init_params.container_id)
print(f'Created a new root fs for our container: {container_dir}')
self._mount_image_dir(init_params.image, container_dir)
self._init_system_dir(container_dir.root_dir)
self._change_root_dir(container_dir.root_dir)
# コンテナでコマンドを実行する
os.execvp(init_params.command[0], init_params.command)
