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autofs job fixes:

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use exec so that upstart knows when automount shuts down.
If a mount is used upstart will send SIGKILL.
Automount doesn't clean up. So unmount everything using a post script.

svn path=/nixos/trunk/; revision=19105
This commit is contained in:
Marc Weber 2009-12-25 06:39:43 +00:00
parent aaac043ae5
commit c0c4d575d2
1 changed files with 39 additions and 7 deletions
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46
modules/services/misc/autofs.nix
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@ -6,6 +6,10 @@ let
cfg = config.services.autofs;
mount = config.system.sbin.mount;
autoMaster = pkgs.writeText "auto.master" cfg.autoMaster;
in
{
@ -19,7 +23,8 @@ in
enable = mkOption {
default = false;
description = "
automatically mount and unmount filesystems
Mount filesystems on demand. Unmount them automatically.
You may also be interested in afuese.
";
};
@ -43,11 +48,15 @@ in
'';
description = "
file contents of /etc/auto.master. See man auto.master
see
man auto.master and man 5 autofs
See man 5 auto.master and man 5 autofs.
";
};
kernelModules = mkOption {
default = ["fuse"];
description="kernel modules to load";
};
timeout = mkOption {
default = 600;
description = "Set the global minimum timeout, in seconds, until directories are unmounted";
@ -55,9 +64,11 @@ in
debug = mkOption {
default = false;
description = "pass -d to automount and write log to /var/log/autofs";
description = "
pass -d and -7 to automount and write log to /var/log/autofs
";
};
};
};
@ -83,14 +94,35 @@ in
};
preStart =
pkgs.lib.concatMapStrings (module : "modprobe ${module} || true\n")
(["autofs4"] ++ cfg.kernelModules);
preStop =
''
modprobe autofs4 || true
set -e; while :; do pkill -TERM automount; sleep 1; done
'';
# automount doesn't clean up when receiving SIGKILL.
# umount -l should unmount the directories recursively when they are no longer used
# It does, but traces are left in /etc/mtab. So unmount recursively..
postStop =
''
PATH=${pkgs.gnused}/bin:${pkgs.coreutils}/bin
exec &> /tmp/logss
# double quote for sed:
escapeSpaces(){ sed 's/ /\\\\040/g'; }
unescapeSpaces(){ sed 's/\\040/ /g'; }
sed -n 's@^\s*\(\([^\\ ]\|\\ \)*\)\s.*@\1@p' ${autoMaster} | sed 's/[\\]//' | while read mountPoint; do
sed -n "s@[^ ]\+\s\+\($(echo "$mountPoint"| escapeSpaces)[^ ]*\).*@\1@p" /proc/mounts | sort -r | unescapeSpaces| while read smountP; do
${mount}/bin/umount -l "$smountP" || true
done
done
'';
script =
''
${if cfg.debug then "exec &> /var/log/autofs" else ""}
${pkgs.autofs5}/sbin/automount -f -t ${builtins.toString cfg.timeout} ${if cfg.debug then "-d" else ""} "${pkgs.writeText "auto.master" cfg.autoMaster}"
exec ${pkgs.autofs5}/sbin/automount ${if cfg.debug then "-d" else ""} -f -t ${builtins.toString cfg.timeout} "${autoMaster}" ${if cfg.debug then "-l7" else ""}
'';
};