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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.systemhealth;
systemhealth = with pkgs; stdenv.mkDerivation {
name = "systemhealth-1.0";
src = fetchurl {
url = "http://www.brianlane.com/static/downloads/systemhealth/systemhealth-1.0.tar.bz2";
sha256 = "1q69lz7hmpbdpbz36zb06nzfkj651413n9icx0njmyr3xzq1j9qy";
};
buildInputs = [ python ];
installPhase = ''
ensureDir $out/bin
# Make it work for kernels 3.x, not so different than 2.6
sed -i 's/2\.6/4.0/' system_health.py
cp system_health.py $out/bin
'';
};
rrdDir = "/var/lib/health/rrd";
htmlDir = "/var/lib/health/html";
configFile = rrdDir + "/.syshealthrc";
# The program will try to read $HOME/.syshealthrc, so we set the proper home.
command = "HOME=${rrdDir} ${systemhealth}/bin/system_health.py";
cronJob = ''
*/5 * * * * wwwrun ${command} --log
5 * * * * wwwrun ${command} --graph
'';
nameEqualName = s: "${s} = ${s}";
interfacesSection = concatStringsSep "\n" (map nameEqualName cfg.interfaces);
driveLine = d: "${d.path} = ${d.name}";
drivesSection = concatStringsSep "\n" (map driveLine cfg.drives);
in
{
options = {
services.systemhealth = {
enable = mkOption {
default = false;
description = ''
Enable the system health monitor and its generation of graphs.
'';
};
urlPrefix = mkOption {
default = "/health";
description = ''
The URL prefix under which the System Health web pages appear in httpd.
'';
};
interfaces = mkOption {
default = [ "lo" ];
example = [ "lo" "eth0" "eth1" ];
description = ''
Interfaces to monitor (minimum one).
'';
};
drives = mkOption {
default = [ ];
example = [ { name = "root"; path = "/"; } ];
description = ''
Drives to monitor.
'';
};
};
};
config = mkIf cfg.enable {
services.cron.systemCronJobs = [ cronJob ];
system.activationScripts.systemhealth = stringAfter [ "var" ]
''
mkdir -p ${rrdDir} ${htmlDir}
chown wwwrun:wwwrun ${rrdDir} ${htmlDir}
cat >${configFile} << EOF
[paths]
rrdtool = ${pkgs.rrdtool}/bin/rrdtool
loadavg_rrd = loadavg
ps = /run/current-system/sw/bin/ps
df = /run/current-system/sw/bin/df
meminfo_rrd = meminfo
uptime_rrd = uptime
rrd_path = ${rrdDir}
png_path = ${htmlDir}
[processes]
[interfaces]
${interfacesSection}
[drives]
${drivesSection}
[graphs]
width = 400
time = ['-3hours', '-32hours', '-8days', '-5weeks', '-13months']
height = 100
[external]
EOF
chown wwwrun:wwwrun ${configFile}
${pkgs.su}/bin/su -s "/bin/sh" -c "${command} --check" wwwrun
${pkgs.su}/bin/su -s "/bin/sh" -c "${command} --html" wwwrun
'';
services.httpd.extraSubservices = [
{ function = f: {
extraConfig = ''
Alias ${cfg.urlPrefix} ${htmlDir}
<Directory ${htmlDir}>
Order allow,deny
Allow from all
</Directory>
'';
};
}
];
};
}
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