On Jun 30, 2014, at 2:24 PM, Vladimir Melnik <[email protected]> wrote:
> Dear colleagues,
>
> If you administrating CloudStack installations, you may find it useful.
> If you love Perl5, you may consider it interesting.
>
> I'm developing a library and some set of tools for managing
> CloudStack-based infrastructure from the command line. It's going to
> become a smart system for doing lots of administrative tasks, so it's
> only the beginning for now. :-)
>
> But what we have at the moment?
>
> As about tools, we can do such things from UNIX-shell...
>
> For example, let's assume you want to check state of the VM having
> a certain IP-address AND being a member of a certain domain:
>
> admin> mm_vm_info has_ipaddress=10.1.1.127 has_domain=A201306
>
> <?xml version="1.0" encoding="UTF-8"?>
> <listvirtualmachinesresponse>
> <virtualmachine>
> <id>99b885d4-70d7-4efc-8a4e-53417893fb19</id>
> <name>99b885d4-70d7-4efc-8a4e-53417893fb19</name>
> [...]
>
> Or, if you want to, you can get certain parameters of this output:
>
> admin> mm_vm_info has_ipaddress=10.1.1.127 has_domain=A201306 \
> -x //state -x //hostname -x //instancename
>
> <state>Running</state>
> <hostname>h2.c1.p1.z1.tucha13.net</hostname>
> <instancename>i-51-135-VM</instancename>
>
> You can reset the VM found by your desired criterias:
>
> admin> mm_vm_reset has_instancename=i-13-666-VM
>
> Want to listen to someone's network interface? No problem.
>
> admin> mm_vm_tcpdump has_ipaddress=10.1.1.253
> tcpdump: WARNING: vnet17: no IPv4 address assigned
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on vnet17, link-type EN10MB (Ethernet), capture size 65535 bytes
> 15:21:01.845886 IP 10.1.1.1.36686 > 10.1.1.253.imaps: Flags [S], seq
> 316746440, win 14600, options [mss 1460,sackOK,TS val 1959872931 ecr
> 0,nop,wscale 6], length 0
> 15:21:01.846023 IP 10.1.1.253.imaps > 10.1.1.1.36686: Flags [S.], seq
> 2234071684, ack 316746441, win 14480, options [mss 1460,sackOK,TS val
> 2579908884 ecr 1959872931,nop,wscale 6], length 0
>
Very nice :)
> ^^^ The script have found the hostname and the instance name, logged
> into the host, analyzed output of "virsh dumpxml ...", found the
> interface's name (vnet17) and launched tcpdump.
>
> And you can use all these things not only from the command-line, as you
> can use the object oriented library using all these things from your own
> Perl5 scripts.
>
> Let's assume you want to find and load all the information about some
> domain:
>
> my $domain = eval { MonkeyMan::CloudStack::Elements::Domain->new(
> mm => $mm,
> load_dom => {
> conditions => {
> path => 'ROOT/CUSTOMERS/ZALOOPA'
> }
> }
> )};
>
> if($@) { $log->warn("Can't
> MonkeyMan::CloudStack::Elements::Domain->new(): $@"); next; }
>
> Voila, now you have the corresponding object's reference in the $domain
> variable. You can do some easy tricks with that domain. It's pretty easy
> to get any parameter:
>
> my $domain_id = $domain->get_parameter('id');
>
> unless(defined($domain_id)) {
> $log->warn("Can't get the ID of the domain" .
> ($domain->has_error ? (": " . $domain->error_message) :
> undef)
> );
> next;
> }
>
> What if you want to get all volumes belongs to this domain? It's easy:
>
> my $volumz = $domain->find_related_to_me("volume");
> $log->logdie($domain->error_message) unless defined($volumz);
>
> No kidding, you have the reference to the list of XML::LibXML documents
> who have the <domainid> parameter corresponding to this domain. You can
> easily initialize them as objects to do other cool things with these
> volumes:
>
> foreach my $volume_dom (@{ $volumz }) {
>
> my $volume = eval {
> MonkeyMan::CloudStack::Elements::Volume->new(
> mm => $mm,
> load_dom => {
> dom => $volume_dom # the XML document
> }
> ); };
> if($@) { $log->warn("Can't
> MonkeyMan::CloudStack::Elements::Volume->new(): $@"); next; }
>
> Oh, well, too much words... :-)
>
> Would you like to use it? You're strongly welcome:
>
> https://github.com/melnik13/monkeyman/
>
> Would you like to develop it with me? Feel free to drop me a line.
>
you might want to forward this mail to the dev list.
> A great week to you all!
>
Awesome work, thanks for sharing
>
> --
> V.Melnik
