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[swift]: <short description of problem>

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Description

Installs packages and configuration for OpenStack Swift

Requirements

Client:

• CentOS >= 6.3
• Ubuntu >= 12.04

Chef:

• 0.10.8

Other variants of Ubuntu and Fedora may work, something crazy like Solaris probably will not. YMMV, objects in mirror, etc.

Attributes

• node[:swift][:authmode] - "swauth" or "keystone" (default "swauth")

• node[:swift][:swift_hash] - swift_hash_path_suffix in /etc/swift/swift.conf

• node[:swift][:audit_hour] - Hour to run swift_auditor on storage nodes (default 5)

• node[:swift][:disk_enum_expr] - Eval-able expression that lists candidate disk nodes for disk probing. The result shoule be a hash with keys being the device name (without the leading "/dev/") and a hash block of any extra info associated with the device. For example: { "sdc" => { "model": "Hitachi 7K3000" }}. Largely, though, if you are going to make a list of valid devices, you probably know all the valid devices, and don't need to pass any metadata about them, so { "sdc" => {}} is probably enough. Example expression: Hash[('a'..'f').collect{|x| [ "sd{x}", {} ]}]

• node[:swift][:disk_test_filter] - an array of expressions that must all be true in order a block deviced to be considered for formatting and inclusion in the cluster. Each rule gets evaluated with "candidate" set to the device name (without the leading "/dev/") and info set to the node hash value. Default rules:

  • "candidate =~ /sd[^a]/ or candidate =~ /hd[^a]/ or candidate =~ /vd[^a]/"

  • "File.exists?('/dev/ + candidate)"

  • "not system('/sbin/sfdisk -V /dev/' + candidate + '>/dev/null 2>&2')"

  • "info['removable'] = 0" ])

• node[:swift][:expected_disks] - an array of device names that the operator expecs to be identified by the previous two values. This acts as a second-check on discovered disks. If this array doesn't match the found disks, then chef processing will be stopped. Example: ("b".."f").collect{|x| "sd#{x}"}. Default: none.

There are other attributes that must be set depending on authmode. For "swauth", the following attributes are used:

• node[:swift][:authkey] - swauth "swauthkey" if using swauth

For "keystone", the following attributes are used:

• [:keystone][:admin_port]

• [:keystone][:admin_token]

• [:keystone][:admin_user]

In addition, there are some attributes used by osops-utils to find interfaces on particular devices.

• node[:osops_networks][:swift] - CIDR of the storage network (what address to bind storage nodes to, what ip address to use in rings, etc)

• node[:osops_networks][:public] - CIDR of the network that that the proxy listens to, or the load balancer for proxies listens on

Deps

• dsh
• keystone
• openssl
• osops-utils
• sysctl

Roles

• swift-account-server - storage node for account data
• swift-container-server - storage node for container data
• swift-object-server - storage node for object server
• swift-proxy-server - proxy for swift storge nodes
• swift-management-server - basically serves two functions:
  • proxy node with account management enabled
  • ring repository and ring building workstation THERE CAN ONLY BE ONE HOST WITH THE MANAGMENET SERVER ROLE!
• swift-all-in-one - role shortcut for all object classes and proxy on one machine.

In small environments, it is likely that all storage machines will have all-in-one roles, with a load balancer ahead of it

In larger environments, where it is cost effective to split the proxy and storage layer, storage nodes will carry swift-{account,container,object}-server roles, and there will be dedicated hosts with the swift-proxy-server role.

In really really huge environments, it's possible that the storage node will be split into swift-{container,accout}-server nodes and swift-object-server nodes.

Examples

Example environment:

{
"override_attributes": {
    "swift": {
	"swift_hash": "107c0568ea84",
	"authmode": "swauth",
	"authkey": "3f281b71-ce89-4b27-a2ad-ad873d3f2760"
    },
    "osops_networks": {
	"swift": "192.168.122.0/24"
    }
},
"cookbook_versions": {
},
"description": "",
"default_attributes": {
},
"name": "swift",
"chef_type": "environment",
"json_class": "Chef::Environment"
}

This sets up defaults for a swauth-based cluster with the storage network on 192.168.122.0/24.

Run list for proxy server:

"run_list": [
    "role[swift-proxy-server]"
]

Run list for combined object, container, and account server:

"run_list": [
    "role[swift-object-server]",
    "role[swift-container-server]",
    "role[swift-account-server]"
]

In addition, there must be a node with the the swift-managment-server role to act as the ring repository. a

License and Author

Author:: Ron Pedde (ron.pedde@rackspace.com)
Author:: Will Kelly (will.kelly@rackspace.com)
Author:: Andy McCrae (andrew.mccrae@rackspace.co.uk)

Copyright:: 2012, Rackspace US, Inc.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.