guix system config for tmpfs-mounted /

3 files changed, 175 insertions, 0 deletions

diff --git a/.dir-locals.el b/.dir-locals.el
new file mode 100644
index 0000000..158d4ec
--- /dev/null
+++ b/.dir-locals.el
@@ -0,0 +1,4 @@
+;;; Directory Local Variables            -*- no-byte-compile: t -*-
+;;; For more information see (info "(emacs) Directory Variables")
+
+((nil . ((compile-command . "guix system build ./config.scm"))))
diff --git a/configuration.scm b/configuration.scm
new file mode 100644
index 0000000..10c2023
--- /dev/null
+++ b/configuration.scm
@@ -0,0 +1,144 @@
+(use-modules (gnu))
+(use-service-modules virtualization cups desktop networking ssh xorg)
+
+(define rootfs
+  (file-system
+   (mount-point "/")
+   (needed-for-boot? #t)
+   (device "tmpfs")
+   (type "tmpfs")
+   (check? #f)))
+
+(define gnufs
+  (file-system
+   (mount-point "/gnu")
+   (needed-for-boot? #t)
+   (create-mount-point? #t)
+   (type "btrfs")
+   (device (file-system-label "root"))
+   (options "subvol=/gnu,compress=zstd,discard=async")))
+
+(define persistfs
+  (file-system
+   (mount-point "/persist")
+   (needed-for-boot? #t)
+   (create-mount-point? #t)
+   (type "btrfs")
+   (device (file-system-label "root"))
+   (options "subvol=/persist,compress=zstd,discard=async")))
+
+(define etcfs
+  (file-system
+   (mount-point "/etc")
+   (needed-for-boot? #t)
+   (create-mount-point? #t)
+   (type "btrfs")
+   (device (file-system-label "root"))
+   (options "subvol=/persist/etc,compress=zstd,discard=async")))
+
+(define varfs
+  (file-system
+   (mount-point "/var")
+   (needed-for-boot? #t)
+   (create-mount-point? #t)
+   (type "btrfs")
+   (device (file-system-label "root"))
+   (options "subvol=/persist/var,compress=zstd,discard=async")))
+
+(define bootfs
+  (file-system
+   (mount-point "/boot")
+   (create-mount-point? #t)
+   (type "btrfs")
+   (device (file-system-label "root"))
+   (options "subvol=/persist/boot,compress=zstd,discard=async")))
+
+(define homefs
+  (file-system
+   (mount-point "/home")
+   (create-mount-point? #t)
+   (type "btrfs")
+   (device (file-system-label "root"))
+   (options "subvol=/persist/home,compress=zstd,discard=async")))
+
+(define my-file-systems
+  (list
+
+   rootfs
+   gnufs
+   persistfs
+
+   etcfs
+   varfs
+
+   bootfs
+   homefs
+
+   (file-system
+    (mount-point "/boot/efi")
+    (create-mount-point? #t)
+    (dependencies (list bootfs))
+    (device (file-system-label "ESP"))
+    (type "vfat"))
+
+   (file-system
+    (mount-point "/root")
+    (create-mount-point? #t)
+    (dependencies (list homefs))
+    (type "none")
+    (device "/home/root")
+    (flags '(bind-mount)))
+
+   (file-system
+    (mount-point "/tmp")
+    (create-mount-point? "1777")
+    (device "tmpfs")
+    (type "tmpfs")
+    (flags '(no-suid no-dev))
+    (check? #f))
+
+   (file-system
+    (mount-point "/var/guix/temproots")
+    (create-mount-point? #t)
+    (device "tmpfs")
+    (type "tmpfs")
+    (flags '(no-suid no-dev))
+    (check? #f))))
+
+(operating-system
+ (locale "en_US.utf8")
+ (timezone "America/New_York")
+ (keyboard-layout (keyboard-layout "us" "altgr-intl"))
+ (host-name "guixinit")
+
+ (users
+  (cons*
+   (user-account
+    (name "bjc")
+    (comment "bjc")
+    (group "users")
+    (home-directory "/home/bjc")
+    (supplementary-groups '("wheel" "netdev" "audio" "video")))
+   %base-user-accounts))
+
+ (services
+  (append
+   (list
+    (service openssh-service-type)
+    (service gnome-desktop-service-type)
+    (set-xorg-configuration
+     (xorg-configuration (keyboard-layout keyboard-layout))))
+   %desktop-services))
+
+ (bootloader
+  (bootloader-configuration
+   (bootloader grub-efi-bootloader)
+   (targets (list "/boot/efi"))
+   (keyboard-layout keyboard-layout)))
+
+ (swap-devices '())
+
+ (file-systems
+  (append
+   my-file-systems
+   %base-file-systems)))
diff --git a/readme.org b/readme.org
new file mode 100644
index 0000000..5596abc
--- /dev/null
+++ b/readme.org
@@ -0,0 +1,27 @@
+* partition disk
+gpt, 3 partitions:
+  - 1 :: esp 2GB
+  - 2 :: swap 8GB
+  - 3 :: linux-fs rest
+
+* create filesystems
+: mkfs.vfat -L ESP -F 32 /dev/vda1
+
+: mkfs.btrfs -L root /dev/vda3
+: btrfs subvol create /dev/vda3 /gnu
+: btrfs subvol create /dev/vda3 /persist
+: btrfs subvol create /dev/vda3 /persist/etc
+: btrfs subvol create /dev/vda3 /persist/var
+: btrfs subvol create /dev/vda3 /persist/home
+: btrfs subvol create /dev/vda3 /persist/boot
+
+* mount filesystems
+: mkdir /mnt
+: mount -t tmpfs tmpfs /mnt
+: mount -m -t btrfs -o subvol=/gnu LABEL=root /mnt/gnu
+: mount -m -t btrfs -o subvol=/persist LABEL=root /mnt/persist
+: mount -m -t btrfs -o subvol=/persist/etc LABEL=root /mnt/etc
+: mount -m -t btrfs -o subvol=/persist/var LABEL=root /mnt/var
+: mount -m -t btrfs -o subvol=/persist/home LABEL=root /mnt/home
+: mount -m -t btrfs -o subvol=/persist/boot LABEL=root /mnt/boot
+: mount -m -t vfat LABEL=ESP /mnt/boot/efi