Added hashmap module documentation
Change-Id: I360219500cdc7e2110650aa1531b138c95681bbe
This commit is contained in:
Stéphane Albert
parent
56cdfe9a9e
commit
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@ -31,6 +31,7 @@ extensions = [
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'sphinx.ext.graphviz',
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'sphinx.ext.intersphinx',
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'sphinx.ext.viewcode',
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'sphinx.ext.mathjax',
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'wsmeext.sphinxext',
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'sphinxcontrib.pecanwsme.rest',
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'sphinxcontrib.httpdomain',
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@ -42,8 +42,8 @@ API References
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webapi/v1
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Modules
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=======
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Modules API
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===========
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.. toctree::
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:maxdepth: 1
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@ -51,6 +51,15 @@ Modules
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webapi/rating/*
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Modules documentation
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=====================
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.. toctree::
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:maxdepth: 1
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:glob:
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rating/*
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Indices and tables
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==================
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54
doc/source/rating/graph/hashmap.dot
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54
doc/source/rating/graph/hashmap.dot
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@ -0,0 +1,54 @@
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digraph "Hashmap's data structure" {
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label="HashMap module data structure";
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compound=true;
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compute;
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network [label="network.floating_ip"];
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volume;
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subgraph cluster_0 {
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label="services";
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style=dashed;
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{rank=same; compute -> network -> volume [style=invis];}
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}
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compute -> flavor;
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subgraph cluster_1 {
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label="fields:\nAssociate to metadata";
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style=dashed;
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flavor;
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}
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// Mappings
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micro [label="value=m1.micro\ntype=flat\ncost=0.1"];
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tiny [label="value=m1.tiny\ntype=flat\ncost=0.2"];
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small [label="value=m1.small\ntype=flat\ncost=0.4"];
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floating [label="\ntype=flat\ncost=0.5"];
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// Thresholds
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1024 [label="level=1024\ntype=flat\ncost=0.1"];
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10240 [label="level=10240\ntype=flat\ncost=0.2"];
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subgraph cluster_2 {
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label="mappings";
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style=dashed;
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{rank=same; micro -> tiny -> small -> floating [style=invis];}
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}
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subgraph cluster_3 {
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label="thresholds";
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style=dashed;
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{rank=same; 1024 -> 10240 [style=invis];}
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}
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flavor -> micro;
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flavor -> tiny;
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flavor -> small;
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network -> floating;
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volume -> 1024;
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volume -> 10240;
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}
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240
doc/source/rating/hashmap.rst
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240
doc/source/rating/hashmap.rst
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@ -0,0 +1,240 @@
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=====================
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Hashmap rating module
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=====================
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CloudKitty is shipped with core rating modules.
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Hashmap composition
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===================
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You can see hashmap as a simple tree:
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.. graphviz:: graph/hashmap.dot
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HashMap is composed of different resources and groups.
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Group
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-----
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A group is a way to group calculations of mappings. For example you might want
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to apply a set of rules to charge instance_uptime and another set to block
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storage volume. You don't want the two to be linked so you'll create one group
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for each calculation.
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Service
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-------
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A service is a way to map the rule to the type of data collected (**compute,
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image, volume**).
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Field
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-----
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A field is referring to a metadata field of a resource. For example on an
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instance object (**compute**), you can use the flavor to define specific rules.
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Mapping
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-------
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A mapping is the final object, it's what triggers calculation, for example a
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specific value of flavor on an instance.
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It maps cost to a value of metadata in case of field mapping. And directly a
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cost in case of service mapping.
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Threshold
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---------
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A threshold entry is used to apply rating rules base on level. Its behaviour is
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similar to a mapping except that it applies the cost base on the level.
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HashMap formula
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===============
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Based on all the previous objects here's the calculation formula :
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:math:`\sum_{n=1}^N G_n(qty.(T_{rate}\prod(M_{rate})(T_{flat}+M_{flat})))`
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:G: Group
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:qty: Quantity of resource
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:t: threshold
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:m: threshold
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Example
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=======
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Compute uptime
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--------------
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Apply rating rule on the compute service to charge the instance based on it's
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flavor and uptime:
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Create a group *instance_uptime_flavor*:
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.. code:: raw
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$ cloudkitty hashmap-create-group -n instance_uptime_flavor
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$ cloudkitty hashmap-group-list
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+------------------------+--------------------------------------+
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| Name | Group id |
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+------------------------+--------------------------------------+
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| instance_uptime_flavor | 26d2d69a-4c42-47f1-9d44-2cdfad167f7d |
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+------------------------+--------------------------------------+
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Create the service matching rule:
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.. code:: raw
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$ cloudkitty hashmap-service-create -n compute
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+------------+--------------------------------------+
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| Property | Value |
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+------------+--------------------------------------+
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| name | compute |
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| service_id | 08ab2d27-fe95-400c-9602-e5ad5efdda8b |
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+------------+--------------------------------------+
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Create a field matching rule:
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.. code:: raw
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$ cloudkitty hashmap-field-create \
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-s 08ab2d27-fe95-400c-9602-e5ad5efdda8b -n flavor
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+------------+--------------------------------------+
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| Property | Value |
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+------------+--------------------------------------+
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| field_id | f37364af-6525-40fc-ae08-6d4087429862 |
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| name | flavor |
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| service_id | None |
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+------------+--------------------------------------+
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Create a mapping in the group *instance_uptime_flavor* that will map m1.tiny
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instance to a cost of 0.01:
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.. code:: raw
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$ cloudkitty hashmap-mapping-create \
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-f f37364af-6525-40fc-ae08-6d4087429862 \
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-v m1.tiny -t flat -c 0.01 -g 26d2d69a-4c42-47f1-9d44-2cdfad167f7d
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+------------+--------------------------------------+
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| Property | Value |
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+------------+--------------------------------------+
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| cost | 0.01 |
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| field_id | f37364af-6525-40fc-ae08-6d4087429862 |
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| group_id | 26d2d69a-4c42-47f1-9d44-2cdfad167f7d |
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| mapping_id | df592a91-a6a5-41fa-ba2e-2f763eaa36e5 |
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| service_id | None |
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| type | flat |
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| value | m1.tiny |
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+------------+--------------------------------------+
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In this example every machine with the flavor m1.tiny will be charge 0.01 per
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collection period.
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Volume per gb with discount
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---------------------------
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Now let's do some threshold based rating.
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Create a group *volume_thresholds*:
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.. code:: raw
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$ cloudkitty hashmap-create-group -n volume_thresholds
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$ cloudkitty hashmap-group-list
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+-------------------+--------------------------------------+
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| Name | Group id |
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+-------------------+--------------------------------------+
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| volume_thresholds | dd3dc30e-0e63-11e6-9f83-ab4208c1fe2d |
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+-------------------+--------------------------------------+
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Create the service matching rule:
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.. code:: raw
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$ cloudkitty hashmap-service-create -n volume
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+------------+--------------------------------------+
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| Property | Value |
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+------------+--------------------------------------+
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| name | volume |
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| service_id | 16a48060-0e64-11e6-8e4e-1b285514a36e |
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+------------+--------------------------------------+
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Now let's setup the price per gigabyte:
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.. code:: raw
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$ cloudkitty hashmap-mapping-create \
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-s 16a48060-0e64-11e6-8e4e-1b285514a36e \
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-t flat -c 0.001 -g dd3dc30e-0e63-11e6-9f83-ab4208c1fe2d
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+------------+--------------------------------------+
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| Property | Value |
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+------------+--------------------------------------+
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| cost | 0.001 |
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| field_id | None |
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| group_id | dd3dc30e-0e63-11e6-9f83-ab4208c1fe2d |
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| mapping_id | 41669786-240b-11e6-872c-af96ddb6619c |
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| service_id | 16a48060-0e64-11e6-8e4e-1b285514a36e |
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| type | flat |
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| value | None |
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+------------+--------------------------------------+
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We have the basic price per gigabyte be we now want to apply a discount on huge
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data volumes. Create the thresholds in the group *volume_thresholds* that will
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map different volume quantity to costs:
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Here we set a threshold when going past 50GB, and apply a 2% discount (0.98):
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.. code:: raw
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$ cloudkitty hashmap-threshold-create \
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-s 16a48060-0e64-11e6-8e4e-1b285514a36e \
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-l 50 -t rate -c 0.98 -g dd3dc30e-0e63-11e6-9f83-ab4208c1fe2d
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+------------+--------------------------------------+
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| Property | Value |
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+------------+--------------------------------------+
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| cost | 0.98 |
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| field_id | None |
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| group_id | dd3dc30e-0e63-11e6-9f83-ab4208c1fe2d |
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| level | 50 |
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| mapping_id | 8eb45bfc-0e64-11e6-ad0e-07a62425f284 |
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| service_id | 16a48060-0e64-11e6-8e4e-1b285514a36e |
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| type | rate |
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+------------+--------------------------------------+
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Here we set a threshold when going past 200GB, and apply a 5% discount (0.95):
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.. code:: raw
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$ cloudkitty hashmap-threshold-create \
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-s 16a48060-0e64-11e6-8e4e-1b285514a36e \
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-l 200 -t rate -c 0.95 -g dd3dc30e-0e63-11e6-9f83-ab4208c1fe2d
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+------------+--------------------------------------+
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| Property | Value |
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+------------+--------------------------------------+
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| cost | 0.95 |
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| field_id | None |
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| group_id | dd3dc30e-0e63-11e6-9f83-ab4208c1fe2d |
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| level | 200 |
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| mapping_id | baf180c8-0e64-11e6-abb3-cbae153a6d44 |
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| service_id | 16a48060-0e64-11e6-8e4e-1b285514a36e |
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| type | rate |
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+------------+--------------------------------------+
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In this example every volume is charged 0.01 per GB but if the size goes past
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50GB you'll get a 2% discount, if you even go further you'll get 5% discount
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(only one level apply at a time).
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:20GB: 0.02 per collection period.
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:50GB: 0.049 per collection period.
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:80GB: 0.0784 per collection period.
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:250GB: 0.2375 per collection period.
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