GNU bug report logs - #50133
Add lxd service

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Andrew Whatson <whatson <at> gmail.com>
To: guix-patches <at> gnu.org
Subject: [PATCH 0/6] Add lxd package and service.
Date: Fri, 20 Aug 2021 22:43:00 +1000

Andrew Whatson (6):
  gnu: libraft: Update to 0.11.2.
  gnu: libdqlite: Update to 1.9.0.
  gnu: lxc: Update to 4.0.10.
  gnu: lxcfs: Update to 4.0.9.
  gnu: Add lxd.
  services: Add lxd-service-type.

 gnu/packages/cluster.scm        |   12 +--
 gnu/packages/virtualization.scm |  121 ++++++++++++++++++++++++++++++--
 gnu/services/virtualization.scm |   66 +++++++++++++++++
 gnu/system/file-systems.scm     |   11 ++
 4 files changed, 201 insertions(+), 9 deletions(-)

Message #8 received at 50133 <at> debbugs.gnu.org (full text, mbox):

From: Andrew Whatson <whatson <at> gmail.com>
To: 50133 <at> debbugs.gnu.org
Cc: Andrew Whatson <whatson <at> gmail.com>
Subject: [PATCH 1/6] gnu: libraft: Update to 0.11.2.
Date: Fri, 20 Aug 2021 22:45:19 +1000

* gnu/packages/cluster.scm (libraft): Update to 0.11.2.
[inputs]: Add lz4.
---
 gnu/packages/cluster.scm | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/gnu/packages/cluster.scm b/gnu/packages/cluster.scm
index e643cc58f9..5464c6dd4d 100644
--- a/gnu/packages/cluster.scm
+++ b/gnu/packages/cluster.scm
@@ -28,6 +28,7 @@
   #:use-module (guix packages)
   #:use-module (gnu packages autotools)
   #:use-module (gnu packages check)
+  #:use-module (gnu packages compression)
   #:use-module (gnu packages flex)
   #:use-module (gnu packages gettext)
   #:use-module (gnu packages libevent)
@@ -188,7 +189,7 @@ independently or together to provide resilient infrastructures.")
 (define-public libraft
   (package
     (name "libraft")
-    (version "0.10.1")
+    (version "0.11.2")
     (home-page "https://github.com/canonical/raft")
     (source (origin
               (method git-fetch)
@@ -197,7 +198,7 @@ independently or together to provide resilient infrastructures.")
               (file-name (git-file-name name version))
               (sha256
                (base32
-                "18idj53vnl5fx1ja1zlp8kiwmdxgwjxsi88rdql0pbh0484b92a3"))))
+                "050dwy34jh8dihfwfm0r1by2i3sy9crapipp9idw32idm79y4izb"))))
     (arguments '(#:configure-flags '("--enable-uv")
                  #:phases
                  (modify-phases %standard-phases
@@ -207,7 +208,8 @@ independently or together to provide resilient infrastructures.")
                          ((".*test_uv_append.c.*") ""))
                        #t)))))
     (inputs
-     `(("libuv" ,libuv)))
+     `(("libuv" ,libuv)
+       ("lz4" ,lz4)))
     (native-inputs
      `(("autoconf" ,autoconf)
        ("automake" ,automake)
-- 
2.32.0

Message #11 received at 50133 <at> debbugs.gnu.org (full text, mbox):

From: Andrew Whatson <whatson <at> gmail.com>
To: 50133 <at> debbugs.gnu.org
Cc: Andrew Whatson <whatson <at> gmail.com>
Subject: [PATCH 2/6] gnu: libdqlite: Update to 1.9.0.
Date: Fri, 20 Aug 2021 22:45:20 +1000

* gnu/packages/cluster.scm (libdqlite): Update to 1.9.0.
---
 gnu/packages/cluster.scm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gnu/packages/cluster.scm b/gnu/packages/cluster.scm
index 5464c6dd4d..2de5f6fe36 100644
--- a/gnu/packages/cluster.scm
+++ b/gnu/packages/cluster.scm
@@ -228,7 +228,7 @@ snapshots).")
 (define-public libdqlite
   (package
     (name "libdqlite")
-    (version "1.7.0")
+    (version "1.9.0")
     (home-page "https://github.com/canonical/dqlite")
     (source (origin
               (method git-fetch)
@@ -237,7 +237,7 @@ snapshots).")
               (file-name (git-file-name name version))
               (sha256
                (base32
-                "15cg8yl3n7lcg0qyg0byciz8v6y200ghmzzkwpdzggy3m6c168wl"))))
+                "0zalsvr0vy7632nhm96a29lrfy18iqsmbxpyz2lvq80mrjlbrzsn"))))
     (arguments
      '(#:phases
        (modify-phases %standard-phases
-- 
2.32.0

Message #14 received at 50133 <at> debbugs.gnu.org (full text, mbox):

From: Andrew Whatson <whatson <at> gmail.com>
To: 50133 <at> debbugs.gnu.org
Cc: Andrew Whatson <whatson <at> gmail.com>
Subject: [PATCH 3/6] gnu: lxc: Update to 4.0.10.
Date: Fri, 20 Aug 2021 22:45:21 +1000

* gnu/packages/virtualization.scm (lxc): Update to 4.0.10.
---
 gnu/packages/virtualization.scm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gnu/packages/virtualization.scm b/gnu/packages/virtualization.scm
index 1bbcb46b99..0919ef7785 100644
--- a/gnu/packages/virtualization.scm
+++ b/gnu/packages/virtualization.scm
@@ -997,7 +997,7 @@ all common programming languages.  Vala bindings are also provided.")
 (define-public lxc
   (package
     (name "lxc")
-    (version "4.0.6")
+    (version "4.0.10")
     (source (origin
               (method url-fetch)
               (uri (string-append
@@ -1005,7 +1005,7 @@ all common programming languages.  Vala bindings are also provided.")
                     version ".tar.gz"))
               (sha256
                (base32
-                "0qz4l7mlhq7hx53q606qgvkyzyr01glsw290v8ppzvxn1fydlrci"))))
+                "1sgsic9dzj3wv2k5bx2vhcgappivhp1glkqfc2yrgr6jas052351"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("pkg-config" ,pkg-config)))
-- 
2.32.0

Message #17 received at 50133 <at> debbugs.gnu.org (full text, mbox):

From: Andrew Whatson <whatson <at> gmail.com>
To: 50133 <at> debbugs.gnu.org
Cc: Andrew Whatson <whatson <at> gmail.com>
Subject: [PATCH 4/6] gnu: lxcfs: Update to 4.0.9.
Date: Fri, 20 Aug 2021 22:45:22 +1000

* gnu/packages/virtualization.scm (lxcfs): Update to 4.0.9.
---
 gnu/packages/virtualization.scm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gnu/packages/virtualization.scm b/gnu/packages/virtualization.scm
index 0919ef7785..07ad1cb101 100644
--- a/gnu/packages/virtualization.scm
+++ b/gnu/packages/virtualization.scm
@@ -1044,7 +1044,7 @@ manage system or application containers.")
 (define-public lxcfs
   (package
     (name "lxcfs")
-    (version "4.0.8")
+    (version "4.0.9")
     (home-page "https://github.com/lxc/lxcfs")
     (source (origin
               (method git-fetch)
@@ -1053,7 +1053,7 @@ manage system or application containers.")
               (file-name (git-file-name name version))
               (sha256
                (base32
-                "1f74wy88si2ia035pcvciq5821kc8jcb75w1f8vhbp0cd29rqdpi"))))
+                "0zx58lair8hwi4bxm5h7i8n1j5fcdgw5cr6f4wk9qhks0sr5dip5"))))
     (arguments
      '(#:configure-flags '("--localstatedir=/var")))
     (native-inputs
-- 
2.32.0

Message #20 received at 50133 <at> debbugs.gnu.org (full text, mbox):

From: Andrew Whatson <whatson <at> gmail.com>
To: 50133 <at> debbugs.gnu.org
Cc: Andrew Whatson <whatson <at> gmail.com>
Subject: [PATCH 5/6] gnu: Add lxd.
Date: Fri, 20 Aug 2021 22:45:23 +1000

* gnu/packages/virtualization.scm (lxd): New variable.
---
 gnu/packages/virtualization.scm | 113 ++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)

diff --git a/gnu/packages/virtualization.scm b/gnu/packages/virtualization.scm
index 07ad1cb101..da130d1e9d 100644
--- a/gnu/packages/virtualization.scm
+++ b/gnu/packages/virtualization.scm
@@ -20,6 +20,7 @@
 ;;; Copyright © 2021 Leo Famulari <leo <at> famulari.name>
 ;;; Copyright © 2021 Pierre Langlois <pierre.langlois <at> gmx.com>
 ;;; Copyright © 2021 Dion Mendel <guix <at> dm9.info>
+;;; Copyright © 2021 Andrew Whatson <whatson <at> gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -49,6 +50,7 @@
   #:use-module (gnu packages bison)
   #:use-module (gnu packages build-tools)
   #:use-module (gnu packages check)
+  #:use-module (gnu packages cluster)
   #:use-module (gnu packages cmake)
   #:use-module (gnu packages compression)
   #:use-module (gnu packages cross-base)
@@ -102,6 +104,7 @@
   #:use-module (gnu packages python-xyz)
   #:use-module (gnu packages pulseaudio)
   #:use-module (gnu packages readline)
+  #:use-module (gnu packages rsync)
   #:use-module (gnu packages selinux)
   #:use-module (gnu packages sdl)
   #:use-module (gnu packages sphinx)
@@ -1070,6 +1073,116 @@ of making Linux containers feel more like a virtual machine.
 It started as a side project of LXC but can be used by any run-time.")
     (license license:lgpl2.1+)))
 
+(define-public lxd
+  (package
+    (name "lxd")
+    (version "4.17")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://github.com/lxc/lxd/releases/download/"
+                    "lxd-" version "/lxd-" version ".tar.gz"))
+              (sha256
+               (base32
+                "1kzmgyg5kw3zw9qa6jabld6rmb53b6yy69h7y9znsdlf74jllljl"))))
+    (build-system go-build-system)
+    (arguments
+     `(#:import-path "github.com/lxc/lxd"
+       #:tests? #f ;; tests fail due to missing /var, cgroups, etc.
+       #:modules ((guix build go-build-system)
+                  (guix build union)
+                  (guix build utils)
+                  (srfi srfi-1))
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'unpack-dist
+           (lambda* (#:key import-path #:allow-other-keys)
+             (with-directory-excursion (string-append "src/" import-path)
+               ;; remove the link back to the top level
+               (delete-file (string-append "_dist/src/" import-path))
+               ;; move all the deps into the src directory
+               (copy-recursively "_dist/src" "../../.."))
+             #t))
+         (replace 'build
+           (lambda* (#:key import-path #:allow-other-keys)
+             (with-directory-excursion (string-append "src/" import-path)
+               (invoke "make" "build" "CC=gcc" "TAG_SQLITE3=libsqlite3")
+               #t)))
+         (replace 'check
+           (lambda* (#:key tests? import-path #:allow-other-keys)
+             (when tests?
+               (with-directory-excursion (string-append "src/" import-path)
+                 (invoke "make" "check" "CC=gcc" "TAG_SQLITE3=libsqlite3")))
+             #t))
+         (replace 'install
+           (lambda* (#:key inputs outputs import-path #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out"))
+                    (bin-dir
+                     (string-append out "/bin/"))
+                    (doc-dir
+                     (string-append out "/share/doc/lxd-" ,version))
+                    (completions-dir
+                     (string-append out "/share/bash-completion/completions")))
+               (with-directory-excursion (string-append "src/" import-path)
+                 ;; wrap lxd with runtime dependencies
+                 (wrap-program (string-append bin-dir "lxd")
+                   `("PATH" ":" prefix
+                     ,(fold (lambda (input paths)
+                              (let* ((in (assoc-ref inputs input))
+                                     (bin (string-append in "/bin"))
+                                     (sbin (string-append in "/sbin")))
+                                (append (filter file-exists?
+                                                (list bin sbin)) paths)))
+                            '()
+                            '("bash" "acl" "rsync" "tar" "xz" "btrfs-progs"
+                              "gzip" "dnsmasq" "squashfs-tools" "iproute2"
+                              "criu" "iptables"))))
+                 ;; remove unwanted binaries
+                 (for-each (lambda (prog)
+                             (delete-file (string-append bin-dir prog)))
+                           '("deps" "macaroon-identity" "generate"))
+                 ;; install documentation
+                 (for-each (lambda (file)
+                             (install-file file doc-dir))
+                           (find-files "doc"))
+                 ;; install bash completion
+                 (rename-file "scripts/bash/lxd-client" "scripts/bash/lxd")
+                 (install-file "scripts/bash/lxd" completions-dir)))
+             #t)))))
+    (native-inputs
+     `(;; test dependencies:
+       ;; ("go-github-com-rogpeppe-godeps" ,go-github-com-rogpeppe-godeps)
+       ;; ("go-github-com-tsenart-deadcode" ,go-github-com-tsenart-deadcode)
+       ;; ("go-golang-org-x-lint" ,go-golang-org-x-lint)
+       ("pkg-config" ,pkg-config)))
+    (inputs
+     `(("acl" ,acl)
+       ("eudev" ,eudev)
+       ("libdqlite" ,libdqlite)
+       ("libraft" ,libraft)
+       ("libcap" ,libcap)
+       ("lxc" ,lxc)
+       ;; runtime dependencies:
+       ("bash" ,bash-minimal)
+       ("rsync" ,rsync)
+       ("tar" ,tar)
+       ("xz" ,xz)
+       ("btrfs-progs" ,btrfs-progs)
+       ("gzip" ,gzip)
+       ("dnsmasq" ,dnsmasq)
+       ("squashfs-tools" ,squashfs-tools)
+       ("iproute2" ,iproute)
+       ("criu" ,criu)
+       ("iptables" ,iptables)))
+    (synopsis "Daemon based on liblxc offering a REST API to manage containers")
+    (home-page "https://linuxcontainers.org/lxd/")
+    (description "LXD is a next generation system container manager.  It
+offers a user experience similar to virtual machines but using Linux
+containers instead.  It's image based with pre-made images available for a
+wide number of Linux distributions and is built around a very powerful, yet
+pretty simple, REST API.")
+    (license license:asl2.0)))
+
 (define-public libvirt
   (package
     (name "libvirt")
-- 
2.32.0

Message #23 received at 50133 <at> debbugs.gnu.org (full text, mbox):

From: Andrew Whatson <whatson <at> gmail.com>
To: 50133 <at> debbugs.gnu.org
Cc: Andrew Whatson <whatson <at> gmail.com>
Subject: [PATCH 6/6] services: Add lxd-service-type.
Date: Fri, 20 Aug 2021 22:45:24 +1000

* gnu/services/virtualization.scm (lxd-configuration): New type.
(%lxd-accounts, lxd-service-type): New variables.
(%lxd-activation, lxd-shepherd-service): New procedures.
* gnu/system/file-systems.scm (%elogind-file-systems): Add
"/sys/fs/cgroup/systemd" file-system.
---
 gnu/services/virtualization.scm | 66 +++++++++++++++++++++++++++++++++
 gnu/system/file-systems.scm     | 11 ++++++
 2 files changed, 77 insertions(+)

diff --git a/gnu/services/virtualization.scm b/gnu/services/virtualization.scm
index c8adcd06d0..34ddc94423 100644
--- a/gnu/services/virtualization.scm
+++ b/gnu/services/virtualization.scm
@@ -75,6 +75,9 @@
             virtlog-configuration
             virtlog-service-type
 
+            lxd-configuration
+            lxd-service-type
+
             %qemu-platforms
             lookup-qemu-platforms
             qemu-platform?
@@ -548,6 +551,69 @@ potential infinite waits blocking libvirt."))
    `((libvirt-configuration ,libvirt-configuration-fields))
    'libvirt-configuration))
 
+
+;;;
+;;; LXD linux container daemon.
+;;;
+
+(define-configuration lxd-configuration
+  (lxd
+   (package lxd)
+   "LXD package.")
+  (debug?
+   (boolean #f)
+   "Enable or disable debug messages.")
+  (verbose?
+   (boolean #f)
+   "Enable or disable information messages."))
+
+(define %lxd-accounts
+  (list (user-group (name "lxd") (system? #t))))
+
+(define (%lxd-activation config)
+  #~(begin
+      (use-modules (guix build utils))
+      (mkdir-p "/var/log/lxd")))
+
+(define (lxd-shepherd-service config)
+  (let* ((lxd (lxd-configuration-lxd config))
+         (debug? (lxd-configuration-debug? config))
+         (verbose? (lxd-configuration-verbose? config)))
+    (list
+     (shepherd-service
+      (documentation "LXD daemon.")
+      (provision '(lxd))
+      (requirement '(dbus-system
+                     elogind
+                     file-system-/sys/fs/cgroup/blkio
+                     file-system-/sys/fs/cgroup/cpu
+                     file-system-/sys/fs/cgroup/cpuset
+                     file-system-/sys/fs/cgroup/devices
+                     file-system-/sys/fs/cgroup/memory
+                     file-system-/sys/fs/cgroup/pids
+                     file-system-/sys/fs/cgroup/systemd
+                     networking
+                     udev))
+      (start #~(make-forkexec-constructor
+                (list (string-append #$lxd "/bin/lxd")
+                      "--group=lxd"
+                      "--logfile=/var/log/lxd/lxd.log"
+                      #$@(if debug? '("--debug") '())
+                      #$@(if verbose? '("--verbose") '()))))
+      (stop #~(make-kill-destructor))))))
+
+(define lxd-service-type
+  (service-type
+   (name 'lxd)
+   (extensions
+    (list (service-extension activation-service-type
+                             %lxd-activation)
+          (service-extension shepherd-root-service-type
+                             lxd-shepherd-service)
+          (service-extension account-service-type
+                             (const %lxd-accounts))))
+   (default-value (lxd-configuration))))
+
 
 ;;;
 ;;; Transparent QEMU emulation via binfmt_misc.
diff --git a/gnu/system/file-systems.scm b/gnu/system/file-systems.scm
index b9eda80958..7c3777298b 100644
--- a/gnu/system/file-systems.scm
+++ b/gnu/system/file-systems.scm
@@ -499,6 +499,17 @@ TARGET in the other system."
            (check? #f)
            (options "none,name=elogind")
            (create-mount-point? #t)
+           (dependencies (list (car %control-groups))))
+         ;; The systemd cgroup needs to exist to run systemd inside linux
+         ;; containers (eg. via LXD).  This is *not* required for elogind, but
+         ;; keeping it with the other systemd hacks seemed sensible, for now.
+         (file-system
+           (device "cgroup")
+           (mount-point "/sys/fs/cgroup/systemd")
+           (type "cgroup")
+           (check? #f)
+           (options "none,name=systemd")
+           (create-mount-point? #t)
            (dependencies (list (car %control-groups)))))
    %control-groups))
 
-- 
2.32.0

Message #26 received at 50133 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: Andrew Whatson <whatson <at> gmail.com>
Cc: 50133 <at> debbugs.gnu.org
Subject: Re: bug#50133: [PATCH 0/6] Add lxd package and service.
Date: Tue, 28 Sep 2021 15:42:04 +0200

Hi Andrew,

The whole series LGTM and I’ve already applied patch 1–5.

Some comments below about the service:

Andrew Whatson <whatson <at> gmail.com> skribis:

> * gnu/services/virtualization.scm (lxd-configuration): New type.
> (%lxd-accounts, lxd-service-type): New variables.
> (%lxd-activation, lxd-shepherd-service): New procedures.
> * gnu/system/file-systems.scm (%elogind-file-systems): Add
> "/sys/fs/cgroup/systemd" file-system.

[...]

> +(define lxd-service-type
> +  (service-type
> +   (name 'lxd)
> +   (extensions
> +    (list (service-extension activation-service-type
> +                             %lxd-activation)
> +          (service-extension shepherd-root-service-type
> +                             lxd-shepherd-service)
> +          (service-extension account-service-type
> +                             (const %lxd-accounts))))
> +   (default-value (lxd-configuration))))

Please add a ‘description’ field.

> index b9eda80958..7c3777298b 100644
> --- a/gnu/system/file-systems.scm
> +++ b/gnu/system/file-systems.scm
> @@ -499,6 +499,17 @@ TARGET in the other system."
>             (check? #f)
>             (options "none,name=elogind")
>             (create-mount-point? #t)
> +           (dependencies (list (car %control-groups))))
> +         ;; The systemd cgroup needs to exist to run systemd inside linux
> +         ;; containers (eg. via LXD).  This is *not* required for elogind, but
> +         ;; keeping it with the other systemd hacks seemed sensible, for now.
> +         (file-system
> +           (device "cgroup")
> +           (mount-point "/sys/fs/cgroup/systemd")
> +           (type "cgroup")
> +           (check? #f)
> +           (options "none,name=systemd")
> +           (create-mount-point? #t)
>             (dependencies (list (car %control-groups)))))
>     %control-groups))

Instead of adding it here, how about extending
‘file-system-service-type’ instead, similar to what
‘qemu-binfmt-service-type’ does?  That way, the extra requirement would
be limited to LXD.

Two other things, could you add:

  1. documentation in the manual under “Virtualization Services”, with a
     commented config example?

  2. (ideally) a system test to ensure that the basics of the service
     are working?

TIA!

Ludo’.

Message #29 received at 50133 <at> debbugs.gnu.org (full text, mbox):

From: Vagrant Cascadian <vagrant <at> debian.org>
To: Ludovic Courtès <ludo <at> gnu.org>, Andrew Whatson
 <whatson <at> gmail.com>
Cc: 50133 <at> debbugs.gnu.org, control <at> debbugs.gnu.org
Subject: Re: [bug#50133] [PATCH 0/6] Add lxd package and service.
Date: Fri, 01 Sep 2023 23:01:13 -0700

[Message part 1 (text/plain, inline)]

retitle 50133 Add lxd service
thanks

On 2021-09-28, Ludovic Courtès wrote:
> The whole series LGTM and I’ve already applied patch 1–5.

Retitling as the only outstanding issue is the lxd service.


> Some comments below about the service:
>
> Andrew Whatson <whatson <at> gmail.com> skribis:
>
>> * gnu/services/virtualization.scm (lxd-configuration): New type.
>> (%lxd-accounts, lxd-service-type): New variables.
>> (%lxd-activation, lxd-shepherd-service): New procedures.
>> * gnu/system/file-systems.scm (%elogind-file-systems): Add
>> "/sys/fs/cgroup/systemd" file-system.
>
> [...]
>
>> +(define lxd-service-type
>> +  (service-type
>> +   (name 'lxd)
>> +   (extensions
>> +    (list (service-extension activation-service-type
>> +                             %lxd-activation)
>> +          (service-extension shepherd-root-service-type
>> +                             lxd-shepherd-service)
>> +          (service-extension account-service-type
>> +                             (const %lxd-accounts))))
>> +   (default-value (lxd-configuration))))
>
> Please add a ‘description’ field.
>
>> index b9eda80958..7c3777298b 100644
>> --- a/gnu/system/file-systems.scm
>> +++ b/gnu/system/file-systems.scm
>> @@ -499,6 +499,17 @@ TARGET in the other system."
>>             (check? #f)
>>             (options "none,name=elogind")
>>             (create-mount-point? #t)
>> +           (dependencies (list (car %control-groups))))
>> +         ;; The systemd cgroup needs to exist to run systemd inside linux
>> +         ;; containers (eg. via LXD).  This is *not* required for elogind, but
>> +         ;; keeping it with the other systemd hacks seemed sensible, for now.
>> +         (file-system
>> +           (device "cgroup")
>> +           (mount-point "/sys/fs/cgroup/systemd")
>> +           (type "cgroup")
>> +           (check? #f)
>> +           (options "none,name=systemd")
>> +           (create-mount-point? #t)
>>             (dependencies (list (car %control-groups)))))
>>     %control-groups))
>
> Instead of adding it here, how about extending
> ‘file-system-service-type’ instead, similar to what
> ‘qemu-binfmt-service-type’ does?  That way, the extra requirement would
> be limited to LXD.
>
> Two other things, could you add:
>
>   1. documentation in the manual under “Virtualization Services”, with a
>      commented config example?
>
>   2. (ideally) a system test to ensure that the basics of the service
>      are working?


live well,
  vagrant

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