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v2.0.0
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@ -0,0 +1,165 @@
GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
This version of the GNU Lesser General Public License incorporates
the terms and conditions of version 3 of the GNU General Public
License, supplemented by the additional permissions listed below.
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As used herein, "this License" refers to version 3 of the GNU Lesser
General Public License, and the "GNU GPL" refers to version 3 of the GNU
General Public License.
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other than an Application or a Combined Work as defined below.
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by the Library, but which is not otherwise based on the Library.
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of using an interface provided by the Library.
A "Combined Work" is a work produced by combining or linking an
Application with the Library. The particular version of the Library
with which the Combined Work was made is also called the "Linked
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288
README.md
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@ -21,9 +21,152 @@ TrueNAS SCALE can create persistent Linux 'jails' with systemd-nspawn. This scri
- Optional: GPU passthrough (including nvidia GPU with the drivers bind mounted from the host)
- Starting the jail with your config applied
## Installation
Beginning with 24.04 (Dragonfish), TrueNAS SCALE officially includes the systemd-nspawn containerization program in the base system. Technically there's nothing to install. You only need the `jlmkr.py` script file in the right place. [Instructions with screenshots](https://www.truenas.com/docs/scale/scaletutorials/apps/sandboxes/) are provided on the TrueNAS website. Start by creating a new dataset called `jailmaker` with the default settings (from TrueNAS web interface). Then login as the root user and download `jlmkr.py`.
```shell
cd /mnt/mypool/jailmaker
curl --location --remote-name https://raw.githubusercontent.com/Jip-Hop/jailmaker/main/jlmkr.py
chmod +x jlmkr.py
```
The `jlmkr.py` script (and the jails + config it creates) are now stored on the `jailmaker` dataset and will survive updates of TrueNAS SCALE. If the automatically created `jails` directory is also a ZFS dataset (which is true for new users), then the `jlmkr.py` script will automatically create a new dataset for every jail created. This allows you to snapshot individual jails. For legacy users (where the `jails` directory is not a dataset) each jail will be stored in a plain directory.
### Alias
Optionally you may create a shell alias for the currently logged in (admin) user to conveniently run `jlmkr.py` without having to change into the `jailmaker` directory or specify the full absolute path. I suggest to create the `jlmkr` alias like this:
```shell
echo "alias jlmkr=\"sudo '/mnt/mypool/jailmaker/jlmkr.py'\"" > ~/.bashrc
```
Please replace `/mnt/mypool/jailmaker/` with the actual path to where you stored `jlmkr.py`. If you're using zsh instead of bash, then you should replace `.bashrc` in the command above with `.zshrc`. If you've created the alias, you may use it instead of `./jlmkr.py`.
## Usage
### Create Jail
Creating a jail with the default settings is as simple as:
```shell
./jlmkr.py create --start myjail
```
You may also specify a path to a config template, for a quick and consistent jail creation process.
```shell
./jlmkr.py create --start --config /path/to/config/template myjail
```
Or you can override the default config by using flags. See `./jlmkr.py create --help` for the available options. Anything passed after the jail name will be passed to `systemd-nspawn` when starting the jail. See the `systemd-nspawn` manual for available options, specifically [Mount Options](https://manpages.debian.org/bookworm/systemd-container/systemd-nspawn.1.en.html#Mount_Options) and [Networking Options](https://manpages.debian.org/bookworm/systemd-container/systemd-nspawn.1.en.html#Networking_Options) are frequently used.
```shell
./jlmkr.py create --start --distro=ubuntu --release=jammy myjail --bind-ro=/mnt
```
If you omit the jail name, the create process is interactive. You'll be presented with questions which guide you through the process.
```shell
./jlmkr.py create
```
After answering some questions you should have created your first jail (and it should be running if you chose to start it after creating)!
### Startup Jails on Boot
```shell
# Call startup using the absolute path to jlmkr.py
/mnt/mypool/jailmaker/jlmkr.py startup
```
In order to start jails automatically after TrueNAS boots, run `/mnt/mypool/jailmaker/jlmkr.py startup` as Post Init Script with Type `Command` from the TrueNAS web interface. This will start all the jails with `startup=1` in the config file.
### Start Jail
```shell
./jlmkr.py start myjail
```
### List Jails
See list of jails (including running, startup state, GPU passthrough, distro, and IP).
```shell
./jlmkr.py list
```
### Execute Command in Jail
You may want to execute a command inside a jail, for example manually from the TrueNAS shell, a shell script or a CRON job. The example below executes the `env` command inside the jail.
```shell
./jlmkr.py exec myjail env
```
This example executes bash inside the jail with a command as additional argument.
```shell
./jlmkr.py exec myjail bash -c 'echo test; echo $RANDOM;'
```
### Edit Jail Config
```shell
./jlmkr.py edit myjail
```
Once you've created a jail, it will exist in a directory inside the `jails` dir next to `jlmkr.py`. For example `/mnt/mypool/jailmaker/jails/myjail` if you've named your jail `myjail`. You may edit the jail configuration file using the `./jlmkr.py edit myjail` command. This opens the config file in your favorite editor, as determined by following [Debian's guidelines](https://www.debian.org/doc/debian-policy/ch-customized-programs.html#editors-and-pagers) on the matter. You'll have to stop the jail and start it again with `jlmkr` for these changes to take effect.
### Remove Jail
Delete a jail and remove it's files (requires confirmation).
```shell
./jlmkr.py remove myjail
```
### Stop Jail
```shell
./jlmkr.py stop myjail
```
### Restart Jail
```shell
./jlmkr.py restart myjail
```
### Jail Shell
Switch into the jail's shell.
```shell
./jlmkr.py shell myjail
```
### Jail Status
```shell
./jlmkr.py status myjail
```
### Jail Logs
View a jail's logs.
```shell
./jlmkr.py log myjail
```
### Additional Commands
Expert users may use the following additional commands to manage jails directly: `machinectl`, `systemd-nspawn`, `systemd-run`, `systemctl` and `journalctl`. The `jlmkr` script uses these commands under the hood and implements a subset of their functions. If you use them directly you will bypass any safety checks or configuration done by `jlmkr` and not everything will work in the context of TrueNAS SCALE.
## Security
Despite what the word 'jail' implies, jailmaker's intended use case is to create one or more additional filesystems to run alongside SCALE with minimal isolation. By default the root user in the jail with uid 0 is mapped to the host's uid 0. This has [obvious security implications](https://linuxcontainers.org/lxc/security/#privileged-containers). If this is not acceptable to you, you may lock down the jails by [limiting capabilities](https://manpages.debian.org/bookworm/systemd-container/systemd-nspawn.1.en.html#Security_Options) and/or using [user namespacing](https://manpages.debian.org/bookworm/systemd-container/systemd-nspawn.1.en.html#User_Namespacing_Options) or use a VM instead.
By default the root user in the jail with uid 0 is mapped to the host's uid 0. This has [obvious security implications](https://linuxcontainers.org/lxc/security/#privileged-containers). If this is not acceptable to you, you may lock down the jails by [limiting capabilities](https://manpages.debian.org/bookworm/systemd-container/systemd-nspawn.1.en.html#Security_Options) and/or using [user namespacing](https://manpages.debian.org/bookworm/systemd-container/systemd-nspawn.1.en.html#User_Namespacing_Options) or use a VM instead.
### Seccomp
Seccomp is a Linux kernel feature that restricts programs from making unauthorized system calls. This means that when seccomp is enabled there can be times where a process run inside a jail will be killed with the error "Operation not permitted." In order to find out which syscall needs to be added to the `--system-call-filter=` configuration you can use `strace`.
@ -37,149 +180,10 @@ Failed to initialize PMU! (Operation not permitted)
perf_event_open({type=0x10 /* PERF_TYPE_??? */, size=PERF_ATTR_SIZE_VER7, config=0x100002, sample_period=0, sample_type=0, read_format=PERF_FORMAT_TOTAL_TIME_ENABLED|PERF_FORMAT_GROUP, precise_ip=0 /* arbitrary skid */, use_clockid=1, ...}, -1, 0, -1, 0) = -1 EPERM (Operation not permitted)
write(2, "Failed to initialize PMU! (Opera"..., 52Failed to initialize PMU! (Operation not permitted)
```
The syscall that needs to be added to the `--system-call-filter` option in the jlmkr config in this case would be `perf_event_open`. You may need to run strace multiple times.
The syscall that needs to be added to the `--system-call-filter` option in the `jailmaker` config in this case would be `perf_event_open`. You may need to run strace multiple times.
Seccomp is important for security, but as a last resort can be disabled by setting `seccomp=0` in the jail config.
## Installation
Beginning with 24.04 (Dragonfish), TrueNAS SCALE includes the systemd-nspawn containerization program in the base system. Technically there's nothing to install. You only need the `jlmkr.py` script file in the right place. [Instructions with screenshots](https://www.truenas.com/docs/scale/scaletutorials/apps/sandboxes/) are provided on the TrueNAS website. Start by creating a new dataset called `jailmaker` with the default settings (from TrueNAS web interface). Then login as the root user and download `jlmkr.py`. If you login as non-root user (e.g. as admin), **you must become root first** by executing `sudo su`.
```shell
cd /mnt/mypool/jailmaker
curl --location --remote-name https://raw.githubusercontent.com/Jip-Hop/jailmaker/main/jlmkr.py
chmod +x jlmkr.py
./jlmkr.py install
```
The `jlmkr.py` script (and the jails + config it creates) are now stored on the `jailmaker` dataset and will survive updates of TrueNAS SCALE. If the automatically created `jails` directory is also a ZFS dataset (which is true for new users), then the `jlmkr.py` script will automatically create a new dataset for every jail created. This allows you to snapshot individual jails. For legacy users (where the `jails` directory is not a dataset) each jail will be stored in a plain directory.
A symlink has been created so you can call `jlmkr` from anywhere (unless the boot pool is readonly, which is the default since SCALE 24.04). Additionally shell aliases have been setup, so you can still call `jlmkr` in an interactive shell (even if the symlink couldn't be created).
After an update of TrueNAS SCALE the symlink will be lost (but the shell aliases will remain). To restore the symlink, just run `./jlmkr.py install` again or use [the `./jlmkr.py startup` command](#startup-jails-on-boot).
## Usage
### Create Jail
Creating jail with the default settings is as simple as:
```shell
jlmkr create --start myjail
```
You may also specify a path to a config template, for a quick and consistent jail creation process.
```shell
jlmkr create --start --config /path/to/config/template myjail
```
Or you can override the default config by using flags. See `jlmkr create --help` for the available options. Anything passed after the jail name will be passed to `systemd-nspawn` when starting the jail. See the `systemd-nspawn` manual for available options, specifically [Mount Options](https://manpages.debian.org/bookworm/systemd-container/systemd-nspawn.1.en.html#Mount_Options) and [Networking Options](https://manpages.debian.org/bookworm/systemd-container/systemd-nspawn.1.en.html#Networking_Options) are frequently used.
```shell
jlmkr create --start --distro=ubuntu --release=jammy myjail --bind-ro=/mnt
```
If you omit the jail name, the create process is interactive. You'll be presented with questions which guide you through the process.
```shell
jlmkr create
```
After answering some questions you should have created your first jail (and it should be running if you chose to start it after creating)!
### Startup Jails on Boot
```shell
# Call startup using the absolute path to jlmkr.py
# The jlmkr shell alias doesn't work in Init/Shutdown Scripts
/mnt/mypool/jailmaker/jlmkr.py startup
```
In order to start jails automatically after TrueNAS boots, run `/mnt/mypool/jailmaker/jlmkr.py startup` as Post Init Script with Type `Command` from the TrueNAS web interface. This creates the `jlmkr` symlink (if possible), as well as start all the jails with `startup=1` in the config file.
### Start Jail
```shell
jlmkr start myjail
```
### List Jails
See list of jails (including running, startup state, GPU passthrough, distro, and IP).
```shell
jlmkr list
```
### Execute Command in Jail
You may want to execute a command inside a jail, for example manually from the TrueNAS shell, a shell script or a CRON job. The example below executes the `env` command inside the jail.
```shell
jlmkr exec myjail env
```
This example executes bash inside the jail with a command as additional argument.
```shell
jlmkr exec myjail bash -c 'echo test; echo $RANDOM;'
```
### Edit Jail Config
```shell
jlmkr edit myjail
```
Once you've created a jail, it will exist in a directory inside the `jails` dir next to `jlmkr.py`. For example `/mnt/mypool/jailmaker/jails/myjail` if you've named your jail `myjail`. You may edit the jail configuration file using the `jlmkr edit myjail` command. This opens the config file in your favorite editor, as determined by following [Debian's guidelines](https://www.debian.org/doc/debian-policy/ch-customized-programs.html#editors-and-pagers) on the matter. You'll have to stop the jail and start it again with `jlmkr` for these changes to take effect.
### Remove Jail
Delete a jail and remove it's files (requires confirmation).
```shell
jlmkr remove myjail
```
### Stop Jail
```shell
jlmkr stop myjail
```
### Restart Jail
```shell
jlmkr restart myjail
```
### Jail Shell
Switch into the jail's shell.
```shell
jlmkr shell myjail
```
### Jail Status
```shell
jlmkr status myjail
```
### Jail Logs
View a jail's logs.
```shell
jlmkr log myjail
```
### Additional Commands
Expert users may use the following additional commands to manage jails directly: `machinectl`, `systemd-nspawn`, `systemd-run`, `systemctl` and `journalctl`. The `jlmkr` script uses these commands under the hood and implements a subset of their functions. If you use them directly you will bypass any safety checks or configuration done by `jlmkr` and not everything will work in the context of TrueNAS SCALE.
## Networking
By default a jails will use the same networking namespace, with access to all (physical) interfaces the TrueNAS host has access to. No further setup is required. You may download and install additional packages inside the jail. Note that some ports are already occupied by TrueNAS SCALE (e.g. 443 for the web interface), so your jail can't listen on these ports.
@ -208,7 +212,7 @@ The rootfs image `jlmkr.py` downloads comes from the [Linux Containers Image ser
## Filing Issues and Community Support
When in need of help or when you think you've found a bug in jailmaker, [please start with reading this](https://github.com/Jip-Hop/jailmaker/discussions/135).
When in need of help or when you think you've found a bug in `jailmaker`, [please start with reading this](https://github.com/Jip-Hop/jailmaker/discussions/135).
## References

2
docs/basicconfig.md
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@ -52,7 +52,7 @@ See [Networking](./network.md)
### Colorized bash prompt
To visually distinguish between a root shell inside the jail and a root shell outside the jail, it's possible to colorize the shell prompt. When using a debian jail with the bash shell, you may run the following command **inside the jail** to get a yellow prompt inside the jail (will be activated the next time you run `jlmkr shell myjail`):
To visually distinguish between a root shell inside the jail and a root shell outside the jail, it's possible to colorize the shell prompt. When using a debian jail with the bash shell, you may run the following command **inside the jail** to get a yellow prompt inside the jail (will be activated the next time you run `./jlmkr.py shell myjail`):
```bash
echo "PS1='${debian_chroot:+($debian_chroot)}\[\033[01;33m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '" >> ~/.bashrc

2
docs/compatibility.md
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@ -4,7 +4,7 @@
| | |
|---|---|
|TrueNAS Core|❌|
|TrueNAS 22.12|✅|
|TrueNAS 22.12|❌|
|TrueNAS 23.10|✅|
|TrueNAS 24.04|✅|

2
docs/network.md
View File

@ -91,7 +91,7 @@ DHCP=false
Address=192.168.X.XXX/24
Gateway=192.168.X.X
```
Then restart the network interface inside the jail `systemctl restart systemd-networkd` or restart the jail by running `jlmkr stop JAILNAME && jlmkr start JAILNAME` from the TrueNAS shell. Use `ifconfig` to verify the interface is up and has the correct IP.
Then restart the network interface inside the jail `systemctl restart systemd-networkd` or restart the jail by running `./jlmkr.py stop JAILNAME && ./jlmkr.py start JAILNAME` from the TrueNAS shell. Use `ifconfig` to verify the interface is up and has the correct IP.
## DNS via DHCP

6
docs/zfsmigration.md
View File

@ -11,9 +11,9 @@ Jailmaker operates in dual-mode: it supports using both directories and datasets
#### Stop all jails
`jlmkr stop jail1`
`./jlmkr.py stop jail1`
`jlmkr stop jail2`
`./jlmkr.py stop jail2`
etc..
#### Move/rename the 'jailmaker' directory
@ -56,6 +56,6 @@ Warning! It's important that both directories have the `/` at the end to make su
#### Test everything works
If everything works, you should be able to use the `jlmkr` command directly. Try doing a `jlmkr list` to check if the jails are correctly recognized
If everything works, you should be able to use the `./jlmkr.py` command directly. Try doing a `./jlmkr.py list` to check if the jails are correctly recognized
You can also try creating a new jail and see that the dataset is created automatically.

258
jlmkr.py
View File

@ -4,17 +4,16 @@
with full access to all files via bind mounts, \
thanks to systemd-nspawn!"""
__version__ = "1.5.0"
__version__ = "2.0.0"
__author__ = "Jip-Hop"
__copyright__ = "Copyright (C) 2023, Jip-Hop"
__license__ = "LGPL-3.0-only"
__disclaimer__ = """USE THIS SCRIPT AT YOUR OWN RISK!
IT COMES WITHOUT WARRANTY AND IS NOT SUPPORTED BY IXSYSTEMS."""
import argparse
import configparser
import contextlib
import ctypes
import errno
import glob
import hashlib
import io
import json
@ -38,8 +37,6 @@ from textwrap import dedent
DEFAULT_CONFIG = """startup=0
gpu_passthrough_intel=0
gpu_passthrough_nvidia=0
# The docker_compatible option is deprecated and will be removed in a future release
docker_compatible=0
# Turning off seccomp filtering improves performance at the expense of security
seccomp=1
@ -128,7 +125,7 @@ SCRIPT_PATH = os.path.realpath(__file__)
SCRIPT_NAME = os.path.basename(SCRIPT_PATH)
SCRIPT_DIR_PATH = os.path.dirname(SCRIPT_PATH)
COMMAND_NAME = os.path.basename(__file__)
SYMLINK_NAME = "jlmkr"
SHORTNAME = "jlmkr"
# Only set a color if we have an interactive tty
if sys.stdout.isatty():
@ -337,7 +334,7 @@ def passthrough_nvidia(
):
jail_rootfs_path = get_jail_rootfs_path(jail_name)
ld_so_conf_path = Path(
os.path.join(jail_rootfs_path), f"etc/ld.so.conf.d/{SYMLINK_NAME}-nvidia.conf"
os.path.join(jail_rootfs_path), f"etc/ld.so.conf.d/{SHORTNAME}-nvidia.conf"
)
if not gpu_passthrough_nvidia:
@ -480,7 +477,7 @@ def status_jail(jail_name):
"""
# Alternatively `machinectl status jail_name` could be used
return subprocess.run(
["systemctl", "status", f"{SYMLINK_NAME}-{jail_name}"]
["systemctl", "status", f"{SHORTNAME}-{jail_name}"]
).returncode
@ -489,7 +486,7 @@ def log_jail(jail_name):
Show the log file of the jail with given name.
"""
return subprocess.run(
["journalctl", "-u", f"{SYMLINK_NAME}-{jail_name}"]
["journalctl", "-u", f"{SHORTNAME}-{jail_name}"]
).returncode
@ -574,7 +571,7 @@ def start_jail(jail_name):
seccomp = config.my_getboolean("seccomp")
systemd_run_additional_args = [
f"--unit={SYMLINK_NAME}-{jail_name}",
f"--unit={SHORTNAME}-{jail_name}",
f"--working-directory=./{jail_path}",
f"--description=My nspawn jail {jail_name} [created with jailmaker]",
]
@ -602,47 +599,6 @@ def start_jail(jail_name):
# Or pull docker images containing device nodes:
# docker pull oraclelinux@sha256:d49469769e4701925d5145c2676d5a10c38c213802cf13270ec3a12c9c84d643
if config.my_getboolean("docker_compatible"):
eprint("WARNING: DEPRECATED OPTION")
eprint(
"The `docker_compatible` option is deprecated and will be removed in a future release."
)
eprint("Please refer to the recommended way to run docker in a jail:")
eprint("https://github.com/Jip-Hop/jailmaker/tree/main/templates/docker")
# Enable ip forwarding on the host (docker needs it)
print(1, file=open("/proc/sys/net/ipv4/ip_forward", "w"))
# Load br_netfilter kernel module and enable bridge-nf-call to fix warning when running docker info:
# WARNING: bridge-nf-call-iptables is disabled
# WARNING: bridge-nf-call-ip6tables is disabled
#
# If we are using Apps then this should already be enabled
# May cause "guest container traffic to be blocked by iptables rules that are intended for the host"
# https://unix.stackexchange.com/q/720105/477308
# https://github.com/moby/moby/issues/24809
# https://docs.oracle.com/en/operating-systems/oracle-linux/docker/docker-KnownIssues.html#docker-issues
# https://wiki.libvirt.org/page/Net.bridge.bridge-nf-call_and_sysctl.conf
# https://serverfault.com/questions/963759/docker-breaks-libvirt-bridge-network
if subprocess.run(["modprobe", "br_netfilter"]).returncode == 0:
print(1, file=open("/proc/sys/net/bridge/bridge-nf-call-iptables", "w"))
print(1, file=open("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "w"))
else:
eprint(
dedent(
"""
Failed to load br_netfilter kernel module."""
)
)
print("The `docker_compatible` option disables seccomp filtering...")
seccomp = False
# Add additional flags required for docker
systemd_nspawn_additional_args += [
"--capability=all",
]
# Add hooks to execute commands on the host before/after starting and after stopping a jail
add_hook(
jail_path,
@ -665,20 +621,8 @@ def start_jail(jail_name):
"ExecStopPost",
)
# Legacy gpu_passthrough config setting
if config.my_getboolean("gpu_passthrough", False):
eprint("WARNING: DEPRECATED OPTION")
eprint(
"The `gpu_passthrough` option is deprecated and will be removed in a future release."
)
eprint(
"Please use `gpu_passthrough_intel` and/or `gpu_passthrough_nvidia` instead."
)
gpu_passthrough_intel = True
gpu_passthrough_nvidia = True
else:
gpu_passthrough_intel = config.my_getboolean("gpu_passthrough_intel")
gpu_passthrough_nvidia = config.my_getboolean("gpu_passthrough_nvidia")
gpu_passthrough_intel = config.my_getboolean("gpu_passthrough_intel")
gpu_passthrough_nvidia = config.my_getboolean("gpu_passthrough_nvidia")
passthrough_intel(gpu_passthrough_intel, systemd_nspawn_additional_args)
passthrough_nvidia(
@ -759,7 +703,7 @@ def start_jail(jail_name):
f"""
Failed to start jail {jail_name}...
In case of a config error, you may fix it with:
{SYMLINK_NAME} edit {jail_name}
{COMMAND_NAME} edit {jail_name}
"""
)
)
@ -1223,37 +1167,15 @@ def interactive_config():
)
)
# Enable tab auto completion of file paths after the = symbol
readline.set_completer_delims("=")
readline.parse_and_bind("tab: complete")
readline_lib = ctypes.CDLL(readline.__file__)
rl_completer_quote_characters = ctypes.c_char_p.in_dll(
readline_lib, "rl_completer_quote_characters"
)
# Let the readline library know about quote characters for completion
rl_completer_quote_characters.value = "\"'".encode("utf-8")
# TODO: more robust tab completion of file paths with space or = character
# Currently completing these only works when the path is quoted
# https://thoughtbot.com/blog/tab-completion-in-gnu-readline
# https://stackoverflow.com/a/67118744
# https://github.com/python-cmd2/cmd2/blob/ee7599f9ac0dbb6ce3793f6b665ba1200d3ef9a3/cmd2/cmd2.py
# https://stackoverflow.com/a/40152927
config.my_set(
"systemd_nspawn_user_args",
"\n ".join(shlex.split(input("Additional flags: ") or "")),
)
# Disable tab auto completion
readline.parse_and_bind("tab: self-insert")
print(
dedent(
f"""
The `{COMMAND_NAME} startup` command can automatically ensure {COMMAND_NAME} is installed properly and start a selection of jails.
The `{COMMAND_NAME} startup` command can automatically start a selection of jails.
This comes in handy when you want to automatically start multiple jails after booting TrueNAS SCALE (e.g. from a Post Init Script).
"""
)
@ -1324,7 +1246,7 @@ def create_jail(**kwargs):
# TODO: fallback to default values for e.g. distro and release if they are not in the config file
print(f"Creating jail {jail_name} from config template {jail_config_path}.")
if jail_config_path not in config.read(jail_config_path):
eprint(f"Failed to read config config template {jail_config_path}.")
eprint(f"Failed to read config template {jail_config_path}.")
return 1
else:
print(f"Creating jail {jail_name} with default config.")
@ -1334,7 +1256,6 @@ def create_jail(**kwargs):
for option in [
"distro",
"docker_compatible",
"gpu_passthrough_intel",
"gpu_passthrough_nvidia",
"release",
@ -1358,9 +1279,9 @@ def create_jail(**kwargs):
print(
dedent(
f"""
TIP: Run `{SYMLINK_NAME} create` without any arguments for interactive config.
TIP: Run `{COMMAND_NAME} create` without any arguments for interactive config.
Or use CLI args to override the default options.
For more info, run: `{SYMLINK_NAME} create --help`
For more info, run: `{COMMAND_NAME} create --help`
"""
)
)
@ -1739,14 +1660,8 @@ def list_jails():
config = parse_config_file(get_jail_config_path(jail_name))
if config:
jail["startup"] = config.my_getboolean("startup")
# TODO: remove gpu_passthrough in future release
if config.my_getboolean("gpu_passthrough", False):
jail["gpu_intel"] = True
jail["gpu_nvidia"] = True
else:
jail["gpu_intel"] = config.my_getboolean("gpu_passthrough_intel")
jail["gpu_nvidia"] = config.my_getboolean("gpu_passthrough_nvidia")
jail["gpu_intel"] = config.my_getboolean("gpu_passthrough_intel")
jail["gpu_nvidia"] = config.my_getboolean("gpu_passthrough_nvidia")
if jail_name in running_machines:
machine = running_machines[jail_name]
@ -1795,133 +1710,7 @@ def list_jails():
return 0
def replace_or_add_string(file_path, regex, replacement_string):
"""
Replace all occurrences of a regular expression in a file with a given string.
Add the string to the end of the file if regex doesn't match.
Args:
file_path (str): The path to the file.
regex (str): The regular expression to search for.
replacement_string (str): The string to replace the matches with.
"""
with open(file_path, "a+") as f:
f.seek(0)
updated = False
found = False
new_text = ""
replacement_line = f"{replacement_string}\n"
for line in f:
if not re.match(regex, line):
new_text += line
continue
found = True
new_text += replacement_line
if replacement_line != line:
updated = True
if not new_text.strip():
# In case of an empty file just write the replacement_string
new_text = replacement_line
updated = True
elif not found:
# Add a newline to the end of the file in case it's not there
if not new_text.endswith("\n"):
new_text += "\n"
# Then add our replacement_string to the end of the file
new_text += replacement_line
updated = True
# Only overwrite in case there are change to the file
if updated:
f.seek(0)
f.truncate()
f.write(new_text)
return True
return False
def install_jailmaker():
# Check if command exists in path
if shutil.which("systemd-nspawn"):
print("systemd-nspawn is already installed.")
else:
print("Installing jailmaker dependencies...")
original_permissions = {}
print(
"Temporarily enable apt and dpkg (if not already enabled) to install systemd-nspawn."
)
# Make /bin/apt* and /bin/dpkg* files executable
for file in glob.glob("/bin/apt*") + (glob.glob("/bin/dpkg*")):
original_permissions[file] = os.stat(file).st_mode
stat_chmod(file, 0o755)
subprocess.run(["apt-get", "update"], check=True)
subprocess.run(["apt-get", "install", "-y", "systemd-container"], check=True)
# Restore original permissions
print("Restore permissions of apt and dpkg.")
for file, original_permission in original_permissions.items():
stat_chmod(file, original_permission)
symlink = f"/usr/local/sbin/{SYMLINK_NAME}"
if os.path.lexists(symlink) and not os.path.islink(symlink):
print(
f"Unable to create symlink at {symlink}. File already exists but is not a symlink."
)
# Check if the symlink is already pointing to the desired destination
elif os.path.realpath(symlink) != SCRIPT_PATH:
try:
Path(symlink).unlink(missing_ok=True)
os.symlink(SCRIPT_PATH, symlink)
print(f"Created symlink {symlink} to {SCRIPT_PATH}.")
except OSError as e:
if e.errno != errno.EROFS:
raise e
print(
f"Cannot create symlink because {symlink} is on a readonly filesystem."
)
alias = f"alias jlmkr='\"{SCRIPT_PATH}\"' # managed by jailmaker"
alias_regex = re.compile(r"^\s*alias jlmkr=.*# managed by jailmaker\s*")
shell_env = os.getenv("SHELL")
for shell_type in ["bash", "zsh"]:
file = "/root/.bashrc" if shell_type == "bash" else "/root/.zshrc"
if replace_or_add_string(file, alias_regex, alias):
print(f"Created {shell_type} alias {SYMLINK_NAME}.")
if shell_env.endswith(shell_type):
print(
f"Please source {file} manually for the {SYMLINK_NAME} alias to become effective immediately."
)
else:
print(f"The {shell_type} alias {SYMLINK_NAME} is already present.")
print("Done installing jailmaker.")
return 0
def startup_jails():
returncode = install_jailmaker()
if returncode != 0:
eprint("Failed to install jailmaker. Abort startup.")
return returncode
start_failure = False
for jail_name in get_all_jail_names():
config = parse_config_file(get_jail_config_path(jail_name))
@ -2010,11 +1799,6 @@ def main():
help="list available images to create jails from",
func=run_lxc_download_script,
),
dict(
name="install",
help="install jailmaker dependencies and create symlink",
func=install_jailmaker,
),
dict(
name="list", #
help="list jails",
@ -2048,7 +1832,7 @@ def main():
),
dict(
name="startup",
help=f"install {SYMLINK_NAME} and startup selected jails",
help="startup selected jails",
func=startup_jails,
),
dict(
@ -2097,12 +1881,6 @@ def main():
choices=[0, 1],
help=f"start this jail when running: {SCRIPT_NAME} startup",
)
commands["create"].add_argument(
"--docker_compatible", #
type=int,
choices=[0, 1],
help="DEPRECATED",
)
commands["create"].add_argument(
"--seccomp", #
type=int,

2
templates/docker/README.md
View File

@ -2,4 +2,4 @@
## Setup
Check out the [config](./config) template file. You may provide it when asked during `jlmkr create` or, if you have the template file stored on your NAS, you may provide it directly by running `jlmkr create --start --config /mnt/tank/path/to/docker/config mydockerjail`. If you want the `nvidia-container-toolkit` to be installed, ensure you set `gpu_passthrough_nvidia=1` when creating the jail.
Check out the [config](./config) template file. You may provide it when asked during `./jlmkr.py create` or, if you have the template file stored on your NAS, you may provide it directly by running `./jlmkr.py create --start --config /mnt/tank/path/to/docker/config mydockerjail`. If you want the `nvidia-container-toolkit` to be installed, ensure you set `gpu_passthrough_nvidia=1` when creating the jail.

6
templates/incus/README.md
View File

@ -6,17 +6,17 @@
## Setup
Check out the [config](./config) template file. You may provide it when asked during `jlmkr create` or, if you have the template file stored on your NAS, you may provide it directly by running `jlmkr create --start --config /mnt/tank/path/to/incus/config myincusjail`.
Check out the [config](./config) template file. You may provide it when asked during `./jlmkr.py create` or, if you have the template file stored on your NAS, you may provide it directly by running `./jlmkr.py create --start --config /mnt/tank/path/to/incus/config myincusjail`.
We manually finish the setup by running the following after creating and starting the jail:
```bash
jlmkr exec myincusjail bash -c 'incus admin init'
./jlmkr.py exec myincusjail bash -c 'incus admin init'
```
Follow [First steps with Incus](https://linuxcontainers.org/incus/docs/main/tutorial/first_steps/).
Then visit the Incus GUI inside the browser https://0.0.0.0:8443. To find out which IP address to use instead of 0.0.0.0, check the IP address for your jail with `jlmkr list`.
Then visit the Incus GUI inside the browser https://0.0.0.0:8443. To find out which IP address to use instead of 0.0.0.0, check the IP address for your jail with `./jlmkr.py list`.
## Known Issues

6
templates/lxd/README.md
View File

@ -6,17 +6,17 @@
## Setup
Check out the [config](./config) template file. You may provide it when asked during `jlmkr create` or, if you have the template file stored on your NAS, you may provide it directly by running `jlmkr create --start --config /mnt/tank/path/to/lxd/config mylxdjail`.
Check out the [config](./config) template file. You may provide it when asked during `./jlmkr.py create` or, if you have the template file stored on your NAS, you may provide it directly by running `./jlmkr.py create --start --config /mnt/tank/path/to/lxd/config mylxdjail`.
We manually finish the setup by running the command below after creating and starting the jail. Choose the `dir` storage backend during `lxd init` and answer `yes` to "Would you like the LXD server to be available over the network?"
```bash
jlmkr exec mylxdjail bash -c 'lxd init &&
./jlmkr.py exec mylxdjail bash -c 'lxd init &&
snap set lxd ui.enable=true &&
systemctl reload snap.lxd.daemon'
```
Then visit the `lxd` GUI inside the browser https://0.0.0.0:8443. To find out which IP address to use instead of 0.0.0.0, check the IP address for your jail with `jlmkr list`.
Then visit the `lxd` GUI inside the browser https://0.0.0.0:8443. To find out which IP address to use instead of 0.0.0.0, check the IP address for your jail with `./jlmkr.py list`.
## Known Issues

14
templates/podman/README.md
View File

@ -2,7 +2,7 @@
## Setup
Check out the [config](./config) template file. You may provide it when asked during `jlmkr create` or, if you have the template file stored on your NAS, you may provide it directly by running `jlmkr create --start --config /mnt/tank/path/to/podman/config mypodmanjail`.
Check out the [config](./config) template file. You may provide it when asked during `./jlmkr.py create` or, if you have the template file stored on your NAS, you may provide it directly by running `./jlmkr.py create --start --config /mnt/tank/path/to/podman/config mypodmanjail`.
## Rootless
@ -14,11 +14,11 @@ Check out the [config](./config) template file. You may provide it when asked du
Prerequisites: created a jail using the [config](./config) template file.
Run `jlmkr edit mypodmanjail` and add `--private-users=524288:65536 --private-users-ownership=chown` to `systemd_nspawn_user_args`. We start at UID 524288, as this is the [systemd range used for containers](https://github.com/systemd/systemd/blob/main/docs/UIDS-GIDS.md#summary).
Run `./jlmkr.py edit mypodmanjail` and add `--private-users=524288:65536 --private-users-ownership=chown` to `systemd_nspawn_user_args`. We start at UID 524288, as this is the [systemd range used for containers](https://github.com/systemd/systemd/blob/main/docs/UIDS-GIDS.md#summary).
The `--private-users-ownership=chown` option will ensure the rootfs ownership is corrected.
After the jail has started run `jlmkr stop mypodmanjail && jlmkr edit mypodmanjail`, remove `--private-users-ownership=chown` and increase the UID range to `131072` to double the number of UIDs available in the jail. We need more than 65536 UIDs available in the jail, since rootless podman also needs to be able to map UIDs. If I leave the `--private-users-ownership=chown` option I get the following error:
After the jail has started run `./jlmkr.py stop mypodmanjail && ./jlmkr.py edit mypodmanjail`, remove `--private-users-ownership=chown` and increase the UID range to `131072` to double the number of UIDs available in the jail. We need more than 65536 UIDs available in the jail, since rootless podman also needs to be able to map UIDs. If I leave the `--private-users-ownership=chown` option I get the following error:
> systemd-nspawn[678877]: Automatic UID/GID adjusting is only supported for UID/GID ranges starting at multiples of 2^16 with a range of 2^16
@ -31,7 +31,7 @@ systemd_nspawn_user_args=--network-macvlan=eno1
--private-users=524288:131072
```
Start the jail with `jlmkr start mypodmanjail` and open a shell session inside the jail (as the remapped root user) with `jlmkr shell mypodmanjail`.
Start the jail with `./jlmkr.py start mypodmanjail` and open a shell session inside the jail (as the remapped root user) with `./jlmkr.py shell mypodmanjail`.
Then inside the jail setup the new rootless user:
@ -61,7 +61,7 @@ exit
From the TrueNAS host, open a shell as the rootless user inside the jail.
```bash
jlmkr shell --uid 1000 mypodmanjail
./jlmkr.py shell --uid 1000 mypodmanjail
```
Run rootless podman as user 1000.
@ -97,7 +97,7 @@ Add `sysctl net.ipv4.ip_unprivileged_port_start=23` to the `pre_start_hook` insi
Install and enable cockpit:
```bash
jlmkr exec mypodmanjail bash -c "dnf -y install cockpit cockpit-podman && \
./jlmkr.py exec mypodmanjail bash -c "dnf -y install cockpit cockpit-podman && \
systemctl enable --now cockpit.socket && \
ip a &&
ip route | awk '/default/ { print \$9 }'"
@ -108,7 +108,7 @@ Check the IP address of the jail and access the Cockpit web interface at https:/
If you've setup the `rootless` user, you may login with the password you've created earlier. Otherwise you'd have to add an admin user first:
```bash
jlmkr exec podmantest bash -c 'adduser admin
./jlmkr.py exec podmantest bash -c 'adduser admin
passwd admin
usermod -aG wheel admin'
```