diff -r 74c919af3c38 -r 61e92ae4e6c2 bin/check_amanda-client --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/bin/check_amanda-client Sat Jan 11 23:34:58 2014 +0100 @@ -0,0 +1,331 @@ +#! /usr/bin/perl +# source: https://ssl.schlittermann.de/hg/ius/nagios/nagios-plugin-amanda-client + +use 5.010; +use strict; +use warnings; +use Getopt::Long; +use POSIX; +use File::Spec::Functions; +use Data::Dumper; +use File::Find; +use Carp; +use Pod::Usage; + +our $VERSION = '0.1.0'; + +sub su; +sub find_tool; +sub check_perms; +sub config_names; +sub get_devices; + +sub amchecks; +sub amlists; + +sub main; + +my $NAME = 'AMANDA-CLIENT'; + +sub ok; +sub warning; +sub critical; +sub unknown; +sub verbose; +sub unique { my %h; @h{@_} = (); keys %h } + +$SIG{__DIE__} = sub { unknown @_ unless $^S }; + +exit main @ARGV; + +#---- + +sub main { + my @opt_ignore; + my $opt_verbose = 0; + + GetOptions( + 'i|ignore=s@' => \@opt_ignore, + 'h|help' => sub { pod2usage(-verbose => 1, -exit => 0) }, + 'm|man' => sub { pod2usage(-verbose => 2, -exit => 0) }, + 'v|verbose' => \$opt_verbose, + ) or pod2usage; + + if ($opt_verbose) { + *::verbose = sub { say '# ', @_ } + } + else { + *::verbose = sub { } + } + + # test needs to be run as root:* or as backup:backup + my $USER = 'backup'; + my $CFDIR = '/etc/amanda'; + + # change to backup if still root + su $USER if $> == 0; + + # amservice needs to be suid root, but executable + # by the backup user/group + verbose q{checking permissions for `amservice'}; + eval { check_perms find_tool('amservice'), 04750, 'root', $) } + or unknown $@; + + # find the backup sets we know about + # here we suppose that it's possible to find strings like + # 'conf "foo"' in files named 'amanda-client.conf' below /etc/amanda + + verbose qq{find config names from $CFDIR}; + my @confs = sort +unique eval { config_names $CFDIR } + or unknown $@; + + eval { amchecks @confs } or critical $@; + + my @dles = eval { amlists confs => \@confs, ignore => \@opt_ignore } or critical $@; + ok 'config: ' . join(', ', @confs), @dles; + + # never reached + return 0; +} + +# compare the file systems +# get a list of file system +sub get_devices { + open(my $fh, '/proc/filesystems'); + my @types = map { /^\s+(\S+)/ ? $1 : () } <$fh>; + my @df = (df => '-P', map { -t => $_ } @types); + map { [$_, (stat)[0]] } map { (split ' ', $_)[5] } grep { /^\// } `@df`; +} + +sub su { + my $user = shift; + my $group = (getgrnam $user)[0]; + my $uid = getpwnam $user; + my $gid = getgrnam $group; + + my @groups; + + setgrent; + my @rc; + while (my @g = getgrent) { + push @groups, $g[2] if $user ~~ [split ' ', $g[3]]; + } + endgrent; + $) = "@groups"; + + verbose "su to $uid:$gid"; + setgid $gid; + setuid $uid; +} + +sub find_tool { + my $name = shift; + my @rc = grep { -f -x } map { catfile $_, $name } split /:/, $ENV{PATH} + or die "Can't find `$name' in $ENV{PATH}\n"; + $rc[0]; +} + +sub check_perms { + my ($file, $mode, $owner, $group) = @_; + + $owner = getpwuid $owner if $owner ~~ /^\d+$/; + + $group = getgrgid +(split ' ', $group)[0] + if $group ~~ /^[\d\s]+$/; + + stat $file or croak "Can't stat `$file': $!\n"; + + eval { + my $f_owner = getpwuid +(stat _)[4] or die $!; + my $f_group = getgrgid +(stat _)[5] or die $!; + my $f_mode = (stat _)[2] & 07777 or die $!; + + my $msg = + sprintf "need: 0%04o root:$group, got: 0%04o $f_owner:$f_group\n", + $mode, $f_mode; + + die $msg unless $f_owner eq $owner; + die $msg unless $f_group eq $group; + die $msg unless $f_mode == $mode; + }; + die "wrong permissions for `$file', $@" if $@; + 1; +} + +sub config_names { + my $dir = shift; + my @configs = (); + find( + sub { + -f and /^amanda-client\.conf$/ or return; + open(my $fh, '<', $_) or die "Can't open $File::Find::name: $!\n"; + push @configs, map { /^conf\s+"(.+?)"/ ? $1 : () } <$fh>; + }, + $dir + ); + + die +"no configs found below $dir (amanda-client.conf needs need `conf \"foo\"' line)\n" + if not @configs; + return @configs; +} + +sub _amcheck { + + #config: daily + #CHECKING + # + #Amanda Backup Client Hosts Check + #-------------------------------- + #Client check: 1 host checked in 2.242 seconds. 0 problems found. + # + #(brought to you by Amanda 3.3.1) + #The check is finished + + my $conf = shift; + my $_ = qx(amdump_client --config '$conf' check 2>&1); + /^config:\s+$conf\n + CHECKING\n + .*\n + Client.check:.1.host.checked.in.\d+\.\d+.seconds\.\s+0.problems.found\.\n + .*\n + The.check.is.finished$ + /smx or die "unexpected output from check:\n$_"; +} + +sub amchecks { + my @errors = (); + foreach my $conf (@_) { + eval { _amcheck $conf } or push @errors, $@; + } + die @errors if @errors; + return 1; +} + +sub _amlist { + + # return a list of [ name, dev ] tupels. + # name: the name of the disk/device + # dev: the local device id (stat)[0] + # iff the inum of $name != 2, it's not the top directory + # and we set the device id to -1, since $name does not stand for a whole + # device + my $conf = shift; + chomp((undef, my @dles) = qx(amdump_client --config '$conf' list)); + return map { [$_, (stat $_)[1] == 2 ? (stat $_)[0] : -1] } @dles; +} + +sub amlists { + my %arg = @_; + my @confs = @{$arg{confs}} or croak 'missing list of confs'; + my @ignore = @{$arg{ignore}}; + + my @candidates = get_devices; + + my %missing; + + foreach my $conf (@confs) { + my @dles = _amlist $conf; + foreach my $candidate (@candidates) { + + # we're satisfied if either the name of the device is in + # the disklist, or the device id is found + $candidate->[0] ~~ [map { $_->[0] } @dles] and next; + $candidate->[1] ~~ [map { $_->[1] } @dles] and next; + push @{ $missing{$conf} }, $candidate->[0] + if not "$conf:$candidate->[0]" ~~ @ignore; + } + } + die map { "$_ missing: " . join(', ' => @{ $missing{$_} }) . "\n" } + keys %missing + if %missing; + return map { $_->[0] } @candidates; +} + +sub ok { say "$NAME OK\n", join "\n" => @_; exit 0 } +sub warning { print "$NAME WARNING\n", join "\n" => @_; exit 1 } +sub critical { print "$NAME CRITICAL\n", join "\n" => @_; exit 2 } +sub unknown { print "$NAME UNKNOWN\n", join "\n" => @_; exit 3 } + +__END__ + +=head1 NAME + + check_amanda-client - check the amanda backup from the client side + +=head1 SYNOPSIS + + check_amanda-client [-h|--help] [-m|--man] + check_amanda-client [options] + +=head1 DESCRIPTION + +This nagios check plugin checks the Amanda setup from the client side. + +=head1 OPTIONS + +=over + +=item B<-i>|B<--ignore> I + +The name of a filesystem to be ignored. Example: + + check_amanda-client --ignore weekly:/var/spool/squid --ignore daily:/boot + +=item B<-h>|B<--help> + +Show a short description and help text. + +=item B<-m>|B<--man> + +Show the man page of this tool. + +=item B<-v>|B<--verbose> + +Show what's going only. Many for debugging purpose. (default: off) + +=back + +=head1 PREPARATIONS + +In order to make the check working, some preparations needs to be done. + +=head1 Client + +For each backup set you want to check: Create an +F. + + config "foo" + index-server "amanda.example.com" # used by restore + tape-server "amanda.example.com" # used by restore + amdump-server "amanda.example.com" # used by amdump_client + +In addition, the F binary has to be suid root and executable +by the backup user. This requirement is checked automatically by the +plugin. + +=head1 Server + +The server need to know about the amdumpd service. In the F +you need to add "amdumpd" to the list of allowed services. And +additionally in F<.amandahosts> the "backup" user of the client needs +the permissions to run the "amdumpd" service. + + # inetd.conf + amanda stream tcp nowait backup /usr/lib/amanda/amandad amandad -auth=bsdtcp amindexd amidxtaped amdumpd + + # .amandahosts + client.example.com backup amdumpd + client.example.com root amindexd amidxtaped + +=head1 AUTHOR + +Heiko Schlittermann L + +=head1 SOURCE + +Source can be found at L + +=cut + +# vim:et ts=4 sw=4 aw ai: