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phorge-phorge/scripts/drydock/drydock_control.php

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Drydock Rough Cut Summary: Rough cut of Drydock. This is very basic and doesn't do much of use yet (it //does// allocate EC2 machines as host resources and expose interfaces to them), but I think the overall structure is more or less reasonable. == Interfaces Vision: Applications interact with Drydock resources through DrydockInterfaces, like **command**, **filesystem** and **httpd** interfaces. Each interface allows applications to perform some kind of operation on the resource, like executing commands, reading/writing files, or configuring a web server. Interfaces have a concrete, specific API: // Filesystem Interface $fs = $lease->getInterface('filesystem'); // Constants, some day? $fs->writeFile('index.html', 'hello world!'); // Command Interface $cmd = $lease->getInterface('command'); echo $cmd->execx('uptime'); // HTTPD Interface $httpd = $lease->getInterface('httpd'); $httpd->restart(); Interfaces are mostly just stock, although installs might add new interfaces if they expose different ways to interact with resources (for instance, a resource might want to expose a new 'MongoDB' interface or whatever). Currently: We have like part of a command interface. == Leases Vision: Leases keep track of which resources are in use, and what they're being used for. They allow us to know when we need to allocate more resources (too many sandcastles on the existing hosts, e.g.) and when we can release resources (because they are no longer being used). They also give applications something to hold while resources are being allocated. // EXAMPLE: How this should work some day. $allocator = new DrydockAllocator(); $allocator->setResourceType('sandcastle'); $allocator->setAttributes( array( 'diffID' => $diff->getID(), )); $lease = $allocator->allocate(); $diff->setSandcastleLeaseID($lease->getID()); // ... if ($lease->getStatus() == DrydockLeaseStatus::STATUS_ACTIVE) { $sandcastle_link = $lease->getInterface('httpd')->getURI('/'); } else { $sandcastle_link = 'Still building your sandcastle...'; } echo "Sandcastle for this diff: ".$sandcastle_link; // EXAMPLE: How this actually works now. $allocator = new DrydockAllocator(); $allocator->setResourceType('host'); // NOTE: Allocation is currently synchronous but will be task-driven soon. $lease = $allocator->allocate(); Leases are completely stock, installs will not define new lease types. Currently: Leases exist and work but are very very basic. == Resources Vision: Resources represent some actual thing we've put somewhere, whether it's a host, a block of storage, a webroot, or whatever else. Applications interact through resources by acquiring leases to them, and then getting interfaces through these leases. The lease acquisition process has a side effect of allocating new resources if a lease can't be acquired on existing resources (e.g., the application wants storage but all storage resources are full) and things are configured to autoscale. Resources may themselves acquire leases in order to allocate. For instance, a storage resource might first acquire a lease to a host resource. A 'test scaffold' resource might lease a storage resource and a mysql resource. Not all resources are auto-allocate: the entry-level version of Drydock is that you manually allocate a couple boxes and configure them through the web console. Then, e.g., 'storage' / 'webroot' resources allocate on top of them, but the host pool itself does not autoscale. Resources are completely stock, they are abstract shells representing any arbitrary thing. Currently: Resource exist ('host' only) but are very very basic. == Blueprints Vision: Blueprints contain instructions for building interfaces to, (possibly) allocating, updating, managing, and destroying a specific type of resource in a specific location. One way to think of them is that they are scripts for creating and deleting resources. For example, the LocalHost, RemoteHost and EC2Host blueprints can all manage 'host' resources. Eventually, we will support more types of resources (storage, webroot, sandcastle, test scaffold, phacility deployment) and more providers for resource types, some of which will be in the Phabricator mainline and some of which will be custom. Blueprints are very custom and specific to application types, so installs will define new blueprints if they are making significant use of Drydock. Currently: They exist but have few capabilities. The stock blueprints do nearly nothing useful. There is a technically functional blueprint for host allocation in EC2. == Allocator This is just the actual code to execute the lease acquisition process. Test Plan: Ran "drydock_control.php" script, it allocated a machine in EC2, acquired a lease on it, interfaced with it, and then released the lease. Ran it again, got a fresh lease on the existing resource. Reviewers: btrahan, jungejason Reviewed By: btrahan CC: aran Differential Revision: https://secure.phabricator.com/D1454
2012-01-11 20:18:40 +01:00
#!/usr/bin/env php
<?php
$root = dirname(dirname(dirname(__FILE__)));
require_once $root.'/scripts/__init_script__.php';
Undumb the Drydock resource allocator pipeline Summary: This was the major goal of D3859/D3855, and to a lesser degree D3854/D3852. As Drydock is allocating a resource, it may need to allocate other resources first. For example, if it's allocating a working copy, it may need to allocate a host first. Currently, we have the process basically queue up the allocation (insert a task into the queue) and sleep() until it finishes. This is problematic for a bunch of reasons, but the major one is that if allocation takes more resources (host, port, machine, DNS) than you have daemons, they could all end up sleeping and waiting for some other daemon to do their work. This is really stupid. Even if you only take up some of them, you're spending slots sleeping when you could be doing useful work. To partially get around this and make the CLI experience less dumb, there's this goofy `synchronous` flag that gets passed around everywhere and pushes the workflow through a pile of special cases. Basically the `synchronous` flag causes us to do everything in-process. But this is dumb too because we'd rather do things in parallel if we can, and we have to have a lot of special case code to make it work at all. Get rid of all of this. Instead of sleep()ing, try to work on the tasks that need to be worked on. If another daemon grabbed them already that's fine, but in the worst case we just gracefully degrade and do everything in process. So we get the best of both worlds: if we have parallelizable tasks and free daemons, things will execute in parallel. If we have nonparallelizable tasks or no free daemons, things will execute in process. Test Plan: Ran `drydock_control.php --trace` and saw it perform cascading allocations without sleeping or special casing. Reviewers: btrahan Reviewed By: btrahan CC: aran Maniphest Tasks: T2015 Differential Revision: https://secure.phabricator.com/D3861
2012-11-01 19:30:42 +01:00
$args = new PhutilArgumentParser($argv);
$args->setTagline(pht('manage drydock software resources'));
$args->setSynopsis(<<<EOSYNOPSIS
**drydock** __commmand__ [__options__]
Manage Drydock stuff. NEW AND EXPERIMENTAL.
EOSYNOPSIS
);
$args->parseStandardArguments();
Drydock Rough Cut Summary: Rough cut of Drydock. This is very basic and doesn't do much of use yet (it //does// allocate EC2 machines as host resources and expose interfaces to them), but I think the overall structure is more or less reasonable. == Interfaces Vision: Applications interact with Drydock resources through DrydockInterfaces, like **command**, **filesystem** and **httpd** interfaces. Each interface allows applications to perform some kind of operation on the resource, like executing commands, reading/writing files, or configuring a web server. Interfaces have a concrete, specific API: // Filesystem Interface $fs = $lease->getInterface('filesystem'); // Constants, some day? $fs->writeFile('index.html', 'hello world!'); // Command Interface $cmd = $lease->getInterface('command'); echo $cmd->execx('uptime'); // HTTPD Interface $httpd = $lease->getInterface('httpd'); $httpd->restart(); Interfaces are mostly just stock, although installs might add new interfaces if they expose different ways to interact with resources (for instance, a resource might want to expose a new 'MongoDB' interface or whatever). Currently: We have like part of a command interface. == Leases Vision: Leases keep track of which resources are in use, and what they're being used for. They allow us to know when we need to allocate more resources (too many sandcastles on the existing hosts, e.g.) and when we can release resources (because they are no longer being used). They also give applications something to hold while resources are being allocated. // EXAMPLE: How this should work some day. $allocator = new DrydockAllocator(); $allocator->setResourceType('sandcastle'); $allocator->setAttributes( array( 'diffID' => $diff->getID(), )); $lease = $allocator->allocate(); $diff->setSandcastleLeaseID($lease->getID()); // ... if ($lease->getStatus() == DrydockLeaseStatus::STATUS_ACTIVE) { $sandcastle_link = $lease->getInterface('httpd')->getURI('/'); } else { $sandcastle_link = 'Still building your sandcastle...'; } echo "Sandcastle for this diff: ".$sandcastle_link; // EXAMPLE: How this actually works now. $allocator = new DrydockAllocator(); $allocator->setResourceType('host'); // NOTE: Allocation is currently synchronous but will be task-driven soon. $lease = $allocator->allocate(); Leases are completely stock, installs will not define new lease types. Currently: Leases exist and work but are very very basic. == Resources Vision: Resources represent some actual thing we've put somewhere, whether it's a host, a block of storage, a webroot, or whatever else. Applications interact through resources by acquiring leases to them, and then getting interfaces through these leases. The lease acquisition process has a side effect of allocating new resources if a lease can't be acquired on existing resources (e.g., the application wants storage but all storage resources are full) and things are configured to autoscale. Resources may themselves acquire leases in order to allocate. For instance, a storage resource might first acquire a lease to a host resource. A 'test scaffold' resource might lease a storage resource and a mysql resource. Not all resources are auto-allocate: the entry-level version of Drydock is that you manually allocate a couple boxes and configure them through the web console. Then, e.g., 'storage' / 'webroot' resources allocate on top of them, but the host pool itself does not autoscale. Resources are completely stock, they are abstract shells representing any arbitrary thing. Currently: Resource exist ('host' only) but are very very basic. == Blueprints Vision: Blueprints contain instructions for building interfaces to, (possibly) allocating, updating, managing, and destroying a specific type of resource in a specific location. One way to think of them is that they are scripts for creating and deleting resources. For example, the LocalHost, RemoteHost and EC2Host blueprints can all manage 'host' resources. Eventually, we will support more types of resources (storage, webroot, sandcastle, test scaffold, phacility deployment) and more providers for resource types, some of which will be in the Phabricator mainline and some of which will be custom. Blueprints are very custom and specific to application types, so installs will define new blueprints if they are making significant use of Drydock. Currently: They exist but have few capabilities. The stock blueprints do nearly nothing useful. There is a technically functional blueprint for host allocation in EC2. == Allocator This is just the actual code to execute the lease acquisition process. Test Plan: Ran "drydock_control.php" script, it allocated a machine in EC2, acquired a lease on it, interfaced with it, and then released the lease. Ran it again, got a fresh lease on the existing resource. Reviewers: btrahan, jungejason Reviewed By: btrahan CC: aran Differential Revision: https://secure.phabricator.com/D1454
2012-01-11 20:18:40 +01:00
$workflows = id(new PhutilClassMapQuery())
->setAncestorClass('DrydockManagementWorkflow')
->execute();
$workflows[] = new PhutilHelpArgumentWorkflow();
$args->parseWorkflows($workflows);