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-rw-r--r--docs/pap/images/PolicyImplPDPSubGroup.svg2
-rw-r--r--docs/pap/pap.rst58
2 files changed, 60 insertions, 0 deletions
diff --git a/docs/pap/images/PolicyImplPDPSubGroup.svg b/docs/pap/images/PolicyImplPDPSubGroup.svg
new file mode 100644
index 00000000..8987ed22
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+++ b/docs/pap/images/PolicyImplPDPSubGroup.svg
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+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg xmlns="http://www.w3.org/2000/svg" style="background-color: rgb(255, 255, 255);" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="761px" height="406px" viewBox="-0.5 -0.5 761 406" content="&lt;mxfile modified=&quot;2019-05-29T13:20:08.554Z&quot; host=&quot;wiki.onap.org&quot; agent=&quot;Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:67.0) Gecko/20100101 Firefox/67.0&quot; version=&quot;10.6.3&quot; etag=&quot;Rm5bP2sccrUGuJUsMc-9&quot; type=&quot;atlas&quot;&gt;&lt;mxAtlasLibraries/&gt;&lt;diagram id=&quot;37cad116-6517-64d4-de82-baa76c18656a&quot; name=&quot;Page-1&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;"><defs/><g><rect x="160" y="95" width="120" height="310" fill="#ffffff" stroke="#b8b8b8" pointer-events="none"/><g transform="translate(190.5,102.5)"><switch><foreignObject style="overflow:visible;" pointer-events="all" width="59" height="12" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: inline-block; 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font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; vertical-align: top; width: 82px; white-space: nowrap; overflow-wrap: normal; text-align: center;"><div xmlns="http://www.w3.org/1999/xhtml" style="display:inline-block;text-align:inherit;text-decoration:inherit;">PDPSubGroup</div></div></foreignObject><text x="41" y="12" fill="#000000" text-anchor="middle" font-size="12px" font-family="Helvetica">PDPSubGroup</text></switch></g><rect x="200" y="260" width="60" height="30" fill="#fff2cc" stroke="#d6b656" pointer-events="none"/><g transform="translate(210.5,268.5)"><switch><foreignObject style="overflow:visible;" pointer-events="all" width="38" height="12" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; vertical-align: top; width: 39px; white-space: nowrap; overflow-wrap: normal; text-align: center;"><div xmlns="http://www.w3.org/1999/xhtml" style="display:inline-block;text-align:inherit;text-decoration:inherit;">PDP-D</div></div></foreignObject><text x="19" y="12" fill="#000000" text-anchor="middle" font-size="12px" font-family="Helvetica">PDP-D</text></switch></g><rect x="190" y="250" width="60" height="30" fill="#fff2cc" stroke="#d6b656" pointer-events="none"/><g transform="translate(200.5,258.5)"><switch><foreignObject style="overflow:visible;" pointer-events="all" width="38" height="12" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; vertical-align: top; width: 39px; white-space: nowrap; overflow-wrap: normal; text-align: center;"><div xmlns="http://www.w3.org/1999/xhtml" style="display:inline-block;text-align:inherit;text-decoration:inherit;">PDP-D</div></div></foreignObject><text x="19" y="12" fill="#000000" text-anchor="middle" font-size="12px" font-family="Helvetica">PDP-D</text></switch></g><rect x="180" y="240" width="60" height="30" fill="#fff2cc" stroke="#d6b656" pointer-events="none"/><g transform="translate(190.5,248.5)"><switch><foreignObject style="overflow:visible;" pointer-events="all" width="38" height="12" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; vertical-align: top; width: 39px; white-space: nowrap; overflow-wrap: normal; text-align: center;"><div xmlns="http://www.w3.org/1999/xhtml" style="display:inline-block;text-align:inherit;text-decoration:inherit;">PDP-D</div></div></foreignObject><text x="19" y="12" fill="#000000" text-anchor="middle" font-size="12px" font-family="Helvetica">PDP-D</text></switch></g><path d="M 310 95 L 426 95 L 440 109 L 440 145 L 310 145 L 310 95 Z" fill="#d5e8d4" stroke="#82b366" stroke-miterlimit="10" pointer-events="none"/><path d="M 426 95 L 426 109 L 440 109" fill="none" stroke="#82b366" stroke-miterlimit="10" pointer-events="none"/><g transform="translate(312.5,96.5)"><switch><foreignObject style="overflow:visible;" pointer-events="all" width="126" height="41" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; vertical-align: top; width: 126px; white-space: normal; overflow-wrap: normal;"><div xmlns="http://www.w3.org/1999/xhtml" style="display:inline-block;text-align:inherit;text-decoration:inherit;">All PDPs in a <i>PDPSubGroup</i> run the same <i>PolicyImpl</i></div></div></foreignObject><text x="63" y="27" fill="#000000" text-anchor="middle" font-size="12px" font-family="Helvetica">[Not supported by viewer]</text></switch></g><path d="M 270 145 L 310 120" fill="none" stroke="#97d077" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="none"/><path d="M 120 243 L 180 255" fill="none" stroke="#97d077" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="none"/><path d="M 320 195 L 426 195 L 440 209 L 440 245 L 320 245 L 320 195 Z" fill="#d5e8d4" stroke="#82b366" stroke-miterlimit="10" pointer-events="none"/><path d="M 426 195 L 426 209 L 440 209" fill="none" stroke="#82b366" stroke-miterlimit="10" pointer-events="none"/><g transform="translate(322.5,196.5)"><switch><foreignObject style="overflow:visible;" pointer-events="all" width="116" height="41" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; vertical-align: top; width: 116px; white-space: normal; overflow-wrap: normal;"><div xmlns="http://www.w3.org/1999/xhtml" style="display:inline-block;text-align:inherit;text-decoration:inherit;">The PDP running its<i> PolicyImpl</i> is the unit of scaling</div></div></foreignObject><text x="58" y="27" fill="#000000" text-anchor="middle" font-size="12px" font-family="Helvetica">[Not supported by viewer]</text></switch></g><path d="M 240 263 L 320 220" fill="none" stroke="#97d077" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="none"/><path d="M 0 97.5 L 122 97.5 L 130 105.5 L 130 152.5 L 0 152.5 L 0 97.5 Z" fill="#d5e8d4" stroke="#82b366" stroke-miterlimit="10" pointer-events="none"/><path d="M 122 97.5 L 122 105.5 L 130 105.5" fill="none" stroke="#82b366" stroke-miterlimit="10" pointer-events="none"/><g transform="translate(2.5,99.5)"><switch><foreignObject style="overflow:visible;" pointer-events="all" width="126" height="41" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; vertical-align: top; width: 126px; white-space: normal; overflow-wrap: normal;"><div xmlns="http://www.w3.org/1999/xhtml" style="display:inline-block;text-align:inherit;text-decoration:inherit;">A <i>PDPSubGroup</i> is a Kubernetes <b><i>Deployment</i></b></div></div></foreignObject><text x="63" y="27" fill="#000000" text-anchor="middle" font-size="12px" font-family="Helvetica">[Not supported by viewer]</text></switch></g><path d="M 170 145 L 130 125" fill="none" stroke="#97d077" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="none"/><path d="M 0 220 L 106 220 L 120 234 L 120 265 L 0 265 L 0 220 Z" fill="#d5e8d4" stroke="#82b366" stroke-miterlimit="10" pointer-events="none"/><path d="M 106 220 L 106 234 L 120 234" fill="none" stroke="#82b366" stroke-miterlimit="10" pointer-events="none"/><g transform="translate(2.5,221.5)"><switch><foreignObject style="overflow:visible;" pointer-events="all" width="116" height="27" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; vertical-align: top; width: 116px; white-space: normal; overflow-wrap: normal;"><div xmlns="http://www.w3.org/1999/xhtml" style="display:inline-block;text-align:inherit;text-decoration:inherit;">PDPs run as Kubernets <b><i>Pods</i></b><i><br /></i></div></div></foreignObject><text x="58" y="20" fill="#000000" text-anchor="middle" font-size="12px" font-family="Helvetica">[Not supported by viewer]</text></switch></g><path d="M 155 0 L 281 0 L 285 4 L 285 50 L 155 50 L 155 0 Z" fill="#d5e8d4" stroke="#82b366" stroke-miterlimit="10" pointer-events="none"/><path d="M 281 0 L 281 4 L 285 4" fill="none" stroke="#82b366" stroke-miterlimit="10" pointer-events="none"/><g transform="translate(157.5,1.5)"><switch><foreignObject style="overflow:visible;" pointer-events="all" width="126" height="41" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: inline-block; 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diff --git a/docs/pap/pap.rst b/docs/pap/pap.rst
index 964712e6..ff6aac51 100644
--- a/docs/pap/pap.rst
+++ b/docs/pap/pap.rst
@@ -21,6 +21,64 @@ PDP group to arbitrarily appear and disappear and for policy consistency across
maintained. The PAP is responsible for controlling the state across the PDPs in a PDP group. The PAP interacts with the
policy database and transfers policies to PDPs.
+The unit of execution and scaling in the Policy Framework is a *PolicyImpl* entity. A *PolicyImpl* entity runs on a PDP.
+As is explained above, a *PolicyImpl* entity is a *PolicyTypeImpl* implementation parameterized with a TOSCA *Policy*.
+
+.. image:: images/PolicyImplPDPSubGroup.svg
+
+In order to achieve horizontal scalability, we group the PDPs running instances of a given *PolicyImpl* entity logically
+together into a *PDPSubGroup*. The number of PDPs in a *PDPSubGroup* can then be scaled up and down using Kubernetes. In
+other words, all PDPs in a subgroup run the same *PolicyImpl*, that is the same policy template implementation (in
+XACML, Drools, or APEX) with the same parameters.
+
+The figure above shows the layout of *PDPGroup* and *PDPSubGroup* entities. The figure shows examples of PDP groups for
+Control Loop and Monitoring policies on the right.
+
+The health of PDPs is monitored by the PAP in order to alert operations teams managing policies. The PAP manages the life
+cycle of policies running on PDPs.
+
+The table below shows the deployment methods in which *PolicyImpl* entities can be deployed to PDP Subgroups.
+
+========== =========================================== ============================== ==================================
+**Method** **Description** **Advantages** **Disadvantages**
+========== =========================================== ============================== ==================================
+Cold The *PolicyImpl* (*PolicyTypeImpl* and No run time configuration Very restrictive, no run time
+ TOSCA *Policy*) are predeployed on the PDP. required and run time configuration of PDPs is possible.
+ PDP is fully configured and ready to administration is simple.
+ execute when started.
+
+ PDPs register with the PAP when they
+ start, providing the *pdpGroup* they
+ have been preconfigured with.
+
+Warm The *PolicyTypeImpl* entity is predeployed The configuration, parameters, Administration and management is
+ on the PDP. A TOSCA *Policy* may be loaded and PDP group of PDPs may be required. The configuration and
+ at startup. The PDP may be configured or changed at run time by loading life cycle of the TOSCA policies
+ reconfigured with a new or updated TOSCA or updating a TOSCA *Policy* can change at run time and must be
+ *Policy* at run time. into the PDP. administered and managed.
+
+ PDPs register with the PAP when they start, Support TOSCA *Policy* entity
+ providing the *pdpGroup* they have been life cycle managgement is
+ predeployed with if any. The PAP may update supported, allowing features
+ the TOSCA *Policy* on a PDP at any time such as *PolicyImpl* Safe Mode
+ after registration. and *PolicyImpl* retirement.
+
+Hot The *PolicyImpl* (*PolicyTypeImpl* and The policy logic, rules, Administration and management is
+ TOSCA *Policy*) are deployed at run time. configuration, parameters, and more complex. The *PolicyImpl*
+ The *PolicyImpl* (*PolicyTypeImpl* and PDP group of PDPs may be itself and its configuration and
+ TOSCA *Policy*) may be loaded at startup. changed at run time by loading life cycle as well as the life
+ The PDP may be configured or reconfigured or updating a TOSCA *Policy* cycle of the TOSCA policies can
+ with a new or updated *PolicyTypeImpl* and *PolicyTypeImpl* into the change at run time and must be
+ and/or TOSCA *Policy* at run time. PDP. administered and managed.
+
+ PDPs register with the PAP when they Lifecycle management of TOSCA
+ start, providing the *pdpGroup* they have *Policy* entities and
+ been preconfigured with if any. The PAP may *PolicyTypeImpl* entites is
+ update the TOSCA *Policy* and supported, allowing features
+ *PolicyTypeImpl* on a PDP at any time after such as *PolicyImpl* Safe Mode
+ registration and *PolicyImpl* retirement.
+========== =========================================== ============================== ==================================
+
1 APIs
======