![]() It is from this HDIB that you will normally extract and work with the header, color table and pixel data. When programming with the API, this common block of memory is assigned using GlobalAlloc, which returns a handle to the DIB data usually referred to as type HDIB. In practice, you will often deal with the palette, header, and image data as though they were three separate blocks of memory. In order to be truly called a DIB, this data must all be stored in the same block of memory. This memory block is structured in accordance with Windows API specifications for DIBs, and the actual DIB consists of a header, a color palette, and pixel data. DIB files stored on disk, the term is nearly always used to refer to a DIB in a memory block. See the License for the specific language governing permissions and limitations under the License.An introduction to DIBs (Device Independent Bitmaps)Īn introduction to DIBs (Device Independent Bitmaps) DesignĭIB, or Device Independent Bitmap, is the used to describe a bitmap in a format that does not store its contents in terms which relate to a specific device's output capabilities (color depth and pixels-per-inch). 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. Licensed under the Apache License, Version 2.0 (the "License") you may not use this file except in compliance with the License. application state changes should be done from outside via APIsĬopyright 2012,2013 Hewlett-Packard Development Company, L.P.For instance, creating a rabbit account for a nova compute node is something that Heat should arrange, though the act of creating is probably done by a script on the rabbit server - triggered by Heat - and applying the config is done on the compute node by the local node script - again triggered by Heat. inter-node configuration should be done by working through Heat.local node configuration should be done via ORC driven by Heat and/or configuration management system metadata.Note that service accounts are different - they are a form of inter-node configuration. per user config should be done from the outside via APIs, even for users like 'admin' that we know we'll have.Our current heuristic for deciding where to do any particular configuration step: We have five places we can do configuration in TripleO: ' : settings that apply to the whole cluster not on a per-user / per-tenant basis credentials on rabbitmq for a given nova compute node nf or ovs-vsctl add-br br-ex : settings that apply individually to machines ssh key registration with nova: we repeat this sort of config every time we add a user. ![]() In a running OpenStack there are several categories of config. OpenStack images are intended to be deployed and maintained using Nova + Heat.Īs such they should strive to be stateless, maintained entirely via automation. Įxport ELEMENTS_PATH=tripleo-image-elements/elementsĭiskimage-builder/bin/disk-image-create -u base vm bootstrap local-config stackuser heat-cfntools -a i386 -o bootstrapĪlways include heat-cfntools in images that you intend to boot via heat : if that is not done, then the user ssh keys are not reliably pulled down from the metadata server due to interactions with cloud-init. InstructionsĬheckout this source tree and also the diskimage builder, export an ELEMENTS_PATH to add elements from this tree, and build any disk images you need: virtualenv. They are built as part of the TripleO ( ) umbrella project. ![]() ![]() These elements are used to build disk images for deploying OpenStack via Heat. Image building rules for OpenStack images ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |