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add soft restart option to liminix-rebuild

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instead of doing a full reboot, it runs activate / and uses
s6-rc-update to install the new service database
This commit is contained in:
Daniel Barlow 2024-03-28 23:45:10 +00:00
parent 04f5174425
commit 2fb4756a7f
9 changed files with 138 additions and 15 deletions
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25
pkgs/min-copy-closure/liminix-rebuild.sh
View file

@ -2,12 +2,18 @@
ssh_command=${SSH_COMMAND-ssh}
if [ "$1" = "--no-reboot" ] ; then
reboot="true"
reboot="reboot"
case "$1" in
"--no-reboot")
unset reboot
shift
else
reboot="reboot"
fi
;;
"--fast")
reboot="soft"
shift
;;
esac
target_host=$1
shift
@ -21,7 +27,16 @@ if toplevel=$(nix-build "$@" -A outputs.systemConfiguration --no-out-link); then
echo systemConfiguration $toplevel
min-copy-closure $target_host $toplevel
$ssh_command $target_host $toplevel/bin/install
case "$reboot" in
reboot)
$ssh_command $target_host "sync; source /etc/profile; reboot"
;;
soft)
$ssh_command $target_host $toplevel/bin/restart-services
;;
*)
;;
esac
else
echo Rebuild failed
fi

13
pkgs/s6-rc-database/default.nix
View file

@ -21,11 +21,22 @@ in stdenvNoCC.mkDerivation {
if test -d $i; then
for j in $i/* ; do
if test -f $j/type ; then
case $(cat $j/type) in
longrun|oneshot)
# s6-rc-update only wants oneshots in its
# restarts file
echo $(basename $j) " " $i >> $out/hashes
;;
*)
;;
esac
srcs="$srcs $i"
fi
done
fi
done
s6-rc-compile $out/compiled $srcs
s6-rc-db -c $out/compiled contents default
mv $out/hashes $out/compiled
'';
}
}

4
pkgs/systemconfig/default.nix
View file

@ -6,6 +6,7 @@
{
writeText
, writeFennelScript
, lib
, s6-init-bin
, closureInfo
@ -52,7 +53,7 @@ let
chown = if uid>0 || gid>0
then "\nCHOWN(${qpathname},${toString uid},${toString gid});\n"
else "";
in "${cmd} ${chown}";
in "unlink(${qpathname}); ${cmd} ${chown}";
in mapAttrsToList (makeFile prefix) attrset;
activateScript = attrset: writeText "makedevs.c" ''
#include "defs.h"
@ -80,6 +81,7 @@ in attrset:
cp $closure/store-paths $out/etc/nix-store-paths
$STRIP --remove-section=.note --remove-section=.comment --strip-all makedevs -o $out/bin/activate
ln -s ${s6-init-bin}/bin/init $out/bin/init
cp -p ${writeFennelScript "restart-services" [] ./restart-services.fnl} $out/bin/restart-services
cat > $out/bin/install <<EOF
#!/bin/sh -e
prefix=\''${1-/}

37
pkgs/systemconfig/restart-services.fnl Normal file
View file

@ -0,0 +1,37 @@
(fn hashes-from-file [name]
(with-open [f (assert (io.open name :r) name)]
(accumulate [h []
l #(f:read "*l")]
(let [(name hash) (string.match l "([^%s]+) +([^%s]+)")]
(if name
(doto h (tset name hash))
h)))))
(fn write-restarts [old new]
(let [old-hashes (hashes-from-file old)
new-hashes (hashes-from-file new)]
(with-open [f (io.open "/tmp/restarts" :w)]
(each [n h (pairs old-hashes)]
(when (not (= h (. new-hashes n)))
(f:write (.. n " restart\n")))))))
(fn exec [text command]
(io.write (.. text ": "))
(match (os.execute command)
res (print "[OK]")
(nil err) (error (.. "[FAILED " err "]"))))
(let [mypath (: (. arg 0) :match "(.*/)")
activate (.. mypath "activate /")
old-compiled "/run/s6-rc/compiled/"
new-compiled "/etc/s6-rc/compiled/"]
(exec "installing FHS files" activate)
(write-restarts (.. old-compiled "hashes") (.. new-compiled "hashes"))
(exec "updating service database"
(.. "s6-rc-update -f /tmp/restarts " new-compiled))
(exec "starting services" (.. "s6-rc -u -p change default"))
)

12
pkgs/systemconfig/test-hashes Normal file
View file

@ -0,0 +1,12 @@
loopback /nix/store/3k7yp08465k8z8a1514slansj0hbrvbq-loopback
default /nix/store/5247rr0mcr17x9lkaqjiywxmn4q3ibgd-default
lan.link.a.10.3.0.1 /nix/store/99ic5bryzbx12ip4v8sh9cdrv15c8qwl-lan.link.a.10.3.0.1
lo.link.a.-1 /nix/store/a2yvj42ghcg8iyvi51zcmzmpwwkrx30l-lo.link.a.-1
sshd /nix/store/afgznmavi6s9dxkv4vnn9xwd7qz5kk35-sshd
lo.link /nix/store/dz0nvlf16lqv9yndas0sk0xqh7jvx8gm-lo.link
lo.link.a.127.0.0.1 /nix/store/jl018kbgxcnyb70s0cfw19q1zqa0pval-lo.link.a.127.0.0.1
lan.link /nix/store/lxvmhb7ax46s2akj9lsivcq494kmx0hm-lan.link
lan.link.a.10.3.0.1.dnsmasq-log /nix/store/rk8265ikd9lj3fpibyrw0kal32h0ksqg-lan.link.a.10.3.0.1.dnsmasq-log
hostname /nix/store/xfy0ymvnd0zv6wcd26h405f85hfkd8wq-hostname
sshd-log /nix/store/xj58nxvkacsjg3rvwb4bxcqnhaav4d3s-sshd-log
lan.link.a.10.3.0.1.dnsmasq /nix/store/z4l7h9pr4an9aq921cs9wrlvf9b8xr48-lan.link.a.10.3.0.1.dnsmasq

12
pkgs/systemconfig/test-hashes2 Normal file
View file

@ -0,0 +1,12 @@
loopback /nix/store/3k7yp08465k8z8a1514slansj0hbrvbq-loopback
default /nix/store/5247rr0mcr17x9lkaqjiywxmn4q3ibgd-default
lan.link.a.10.3.0.1 /nix/store/99ic5bryzbx12ip4v8sh9cdrv15c8qwl-lan.link.a.10.3.0.1
lo.link.a.-1 /nix/store/a2yvj42ghcg8iyvi51zcmzmpwwkrx30l-lo.link.a.-1
sshd /nix/store/afgznmavi6s9dxkv4vnn9xwd7qz5kk35-sshd
lo.link /nax/store/dz0nvlf16lqv9yndas0sk0xqh7jvx8gm-lo.link
lo.link.a.127.0.0.1 /nix/store/jl018kbgxcnyb70s0cfw19q1zqa0pval-lo.link.a.127.0.0.1
lan.link /nix/store/lxvmhb7ax46s2akj9lsivcq494kmx0hm-lan.link
lan.link.a.10.3.0.1.dnsmasq-log /nix/store/rk8265ikd9lj3fpibyrw0kal32h0ksqg-lan.link.a.10.3.0.1.dnsmasq-log
hostname /nax/store/xfy0ymvnd0zv6wcd26h405f85hfkd8wq-hostname
sshd-log /nax/store/xj58nxvkacsjg3rvwb4bxcqnhaav4d3s-sshd-log

24
tests/min-copy-closure/test-liminix-rebuild.sh
View file

@ -10,6 +10,17 @@
set -e
while test -n "$1"; do
case $1 in
--fast)
FAST=true
;;
*)
;;
esac
shift
done
here=$(pwd)/tests/min-copy-closure
top=$(pwd)
@ -32,7 +43,7 @@ mkdir ./vm
cat ${rootfs} > rootfs
truncate -s 24M rootfs
truncate -s 32M rootfs
resize2fs rootfs
dd if=rootfs of=disk-image bs=512 seek=4 conv=sync
@ -51,9 +62,12 @@ echo "READY"
touch known_hosts
export SSH_COMMAND="ssh -o UserKnownHostsFile=${work}/known_hosts -o StrictHostKeyChecking=no -p 2022 -i ${here}/id"
(cd ${top} && liminix-rebuild root@localhost -I liminix-config=${here}/with-figlet.nix --arg device "import ./devices/qemu-armv7l")
if test -n "$FAST"; then
(cd ${top} && liminix-rebuild --fast root@localhost -I liminix-config=${here}/with-figlet.nix --argstr deviceName qemu-armv7l)
cd ${work} && expect $here/wait-for-soft-restart.expect
else
(cd ${top} && liminix-rebuild root@localhost -I liminix-config=${here}/with-figlet.nix --arg device "import ./devices/qemu-armv7l")
cd ${work} && expect $here/wait-for-reboot.expect
fi
ls -l vm
cd ${work} && expect $here/wait-for-reboot.expect
cd / ; rm -rf $work

13
tests/min-copy-closure/wait-for-soft-restart.expect Normal file
View file

@ -0,0 +1,13 @@
proc chat {instr outstr} {
expect {
$instr { send $outstr }
timeout { exit 1 }
}
}
spawn socat unix-connect:vm/console -
send "exit\r"
chat "BusyBox" "\r"
chat "#" "stty -echo; type -p figlet\r"
chat "figlet-armv7l-unknown-linux" "s6-rc -a list |grep w\\inkle\r"
chat "winkle" "poweroff\r"

7
tests/min-copy-closure/with-figlet.nix
View file

@ -4,4 +4,11 @@
defaultProfile.packages = with pkgs; [
figlet
];
services.ripvanwinkle = pkgs.liminix.services.longrun {
name = "winkle";
run = ''
echo SLEEPING > /dev/console
sleep 3600
'';
};
}