[bug#68073] [PATCH] Add config-file configuration option to dockerd

[Connor Clark via Guix-patches via <guix-patches@gnu.org>]

---

This is my first time submitting a patch here, so please let me know if I'm
missing something important, or my email is formatted incorrectly, or anything
else.

This patch adds an option to pass a json configuration file directly into
dockerd for options which aren't available in the docker-configuration record,
of which there are many. From what I've seen, some other packages use a
raw-configuration-string that gets appended into a file to accomplish similar
things, but I figured a file-like was better here because the rest of the
options are passed into the command invocation and not serialized into a file.

 gnu/services/docker.scm | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/gnu/services/docker.scm b/gnu/services/docker.scm
index 72ef7d74db..4d32b96847 100644
--- a/gnu/services/docker.scm
+++ b/gnu/services/docker.scm
@@ -61,6 +61,8 @@ (define-module (gnu services docker)
             oci-container-service-type
             oci-container-shepherd-service))
 
+(define-maybe file-like)
+
 (define-configuration docker-configuration
   (docker
    (file-like docker)
@@ -87,6 +89,9 @@ (define-configuration docker-configuration
   (environment-variables
    (list '())
    "Environment variables to set for dockerd")
+  (config-file
+   (maybe-file-like)
+   "JSON configuration file to pass to dockerd")
   (no-serialization))
 
 (define %docker-accounts
@@ -131,7 +136,8 @@ (define (docker-shepherd-service config)
          (enable-iptables? (docker-configuration-enable-iptables? config))
          (environment-variables (docker-configuration-environment-variables config))
          (proxy (docker-configuration-proxy config))
-         (debug? (docker-configuration-debug? config)))
+         (debug? (docker-configuration-debug? config))
+         (config-file (docker-configuration-config-file config)))
     (shepherd-service
            (documentation "Docker daemon.")
            (provision '(dockerd))
@@ -144,6 +150,10 @@ (define (docker-shepherd-service config)
            (start #~(make-forkexec-constructor
                      (list (string-append #$docker "/bin/dockerd")
                            "-p" "/var/run/docker.pid"
+                           #$@(if (not (eq? config-file %unset-value))
+                                  (list #~(string-append
+                                           "--config-file=" #$config-file))
+                                  '())
                            #$@(if debug?
                                   '("--debug" "--log-level=debug")
                                   '())

base-commit: 5bd80ccd69047b1777749e24d4adf2c951b5d14b
-- 
2.41.0