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textLength="44.63379">complete</tspan></text><line x1="560.1" y1="282.5" x2="490.55906" y2="282.5" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><line x1="634.1002" y1="341.09296" x2="490.55906" y2="340.15748" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(494.3819 327.50826)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x="1.7004395" y="10" textLength="99.655273">[rpc.cast] to request </tspan><tspan font-family="Helvetica" font-size="11" font-weight="500" x="17.896973" y="23" textLength="64.206055">new instance</tspan></text><path d="M 612.1575 28.346457 L 673.35434 28.346457 C 674.4589 28.346457 675.35434 29.241887 675.35434 30.346457 L 675.35434 66.49314 C 675.35434 67.597708 674.4589 68.49314 673.35434 68.49314 L 612.1575 68.49314 C 611.0529 68.49314 610.1575 67.597708 610.1575 66.49314 L 610.1575 30.346457 C 610.1575 29.241887 611.0529 28.346457 612.1575 28.346457 Z" fill="#39f"/><path d="M 612.1575 28.346457 L 673.35434 28.346457 C 674.4589 28.346457 675.35434 29.241887 675.35434 30.346457 L 675.35434 66.49314 C 675.35434 67.597708 674.4589 68.49314 673.35434 68.49314 L 612.1575 68.49314 C 611.0529 68.49314 610.1575 67.597708 610.1575 66.49314 L 610.1575 30.346457 C 610.1575 29.241887 611.0529 28.346457 612.1575 28.346457 Z" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5"/><text transform="translate(615.1575 41.419797)" fill="black"><tspan font-family="Helvetica" font-size="12" font-weight="bold" x="17.93339" y="11" textLength="19.330078">MQ</tspan></text><line x1="642.75265" y1="69.24314" x2="642.5" y2="1680.9449" stroke="#131313" stroke-linecap="round" stroke-linejoin="round" stroke-width="1" stroke-dasharray="4,4"/><line x1="652.4" y1="374.5" x2="730.374" y2="374.5" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><line x1="581.9" y1="408.5" x2="729.49213" y2="408.5" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><line x1="581.99843" y1="437.75" x2="729.59056" y2="437.75" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><line x1="582.16772" y1="459.5" x2="729.75985" y2="459.5" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><line x1="653.9" y1="486" x2="729.99213" y2="486" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="651.9341" y="501.84252" width="166" height="23" fill="white"/><text transform="translate(656.9341 506.84252)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".038574219" y="10" textLength="155.92285">Subscribe new instance request</tspan></text><line x1="652.53386" y1="520.34252" x2="829.72047" y2="520.34252" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="660.92014" y="523.84252" width="148" height="36" fill="white"/><text transform="translate(665.92014 528.84252)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x="5.1108398" y="10" textLength="127.77832">rpc.call to Nova-conductor</tspan><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".21240234" y="23" textLength="137.575195">to fetch instance information</tspan></text><line x1="653.03386" y1="541.84252" x2="830.22047" y2="541.84252" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="698.67092" y="554.58908" width="166" height="23" fill="white"/><text transform="translate(703.67092 559.58908)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".038574219" y="10" textLength="155.92285">Subscribe new instance request</tspan></text><line x1="652.0338" y1="572.63324" x2="926.5" y2="573.59843" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="692.0571" y="575.5" width="108" height="23" fill="white"/><text transform="translate(697.0571 580.5)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".38623047" y="10" textLength="97.22754">Read instance state</tspan></text><line x1="582.16772" y1="594" x2="926.5" y2="594" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="711.61357" y="596.75388" width="141" height="23" fill="white"/><text transform="translate(716.61357 601.75388)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".37817383" y="10" textLength="130.24365">Publish new instance state</tspan></text><line x1="652.9512" y1="615.25388" x2="926.5" y2="615.25388" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="652.4341" y="622.43503" width="166" height="23" fill="white"/><text transform="translate(657.4341 627.43503)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".038574219" y="10" textLength="155.92285">Subscribe new instance request</tspan></text><line x1="653.03386" y1="640.93503" x2="830.22047" y2="640.93503" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="1020.2205" y="663.80316" width="15.944886" height="83.125985" fill="#b1b1b1"/><rect x="1020.2205" y="663.80316" width="15.944886" height="83.125985" stroke="#313131" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="875.43316" y="647.4034" width="122" height="36" fill="white"/><text transform="translate(880.43316 652.4034)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".06274414" y="10" textLength="111.87451">[REST] get image URL</tspan><tspan font-family="Helvetica" font-size="11" font-weight="500" x="3.7285156" y="23" textLength="104.54297">from glance image ID</tspan></text><line x1="1010.3206" y1="665.54767" x2="829.41536" y2="666.4187" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><line x1="839.31533" y1="746.2152" x2="1020.2205" y2="745.74114" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(888.7441 732.1299)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".453125" y="10" textLength="91.09375">Return image URL</tspan></text><rect x="1324.3789" y="778.79757" width="15.944886" height="64.96067" fill="#b1b1b1"/><rect x="1324.3789" y="778.79757" width="15.944886" height="64.96067" stroke="#313131" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><line x1="1313.9396" y1="779.3569" x2="736.2431" y2="777.9944" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(940.75884 764.25593)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".42749023" y="10" textLength="3.0561523"> </tspan><tspan font-family="Helvetica" font-size="11" font-weight="500" x="2.88208" y="10" textLength="86.834473">Allocate and confi</tspan><tspan font-family="Helvetica" font-size="11" font-weight="500" x="89.716553" y="10" textLength="141.85596">gure the network for instance</tspan></text><rect x="987.6077" y="824.04725" width="94" height="23" fill="white"/><text transform="translate(992.6077 829.04725)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".42504883" y="10" textLength="83.1499"> Get network info</tspan></text><line x1="840.12047" y1="842.54725" x2="1322.5994" y2="842.54725" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="983.4508" y="853.7008" width="90" height="23" fill="white"/><text transform="translate(988.4508 858.7008)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".25390625" y="10" textLength="79.492188">Read request IP</tspan></text><line x1="653.9" y1="872.2008" x2="1424.33955" y2="872.2008" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="1451.3444" y="866.29135" width="63" height="23" fill="white"/><text transform="translate(1456.3444 871.29135)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".20849609" y="10" textLength="52.583008">Allocate IP</tspan></text><line x1="1519.2663" y1="887.79135" x2="1434.749" y2="887.79135" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="1464.39065" y="889.79135" width="39" height="23" fill="white"/><text transform="translate(1469.39065 894.79135)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".43847656" y="10" textLength="28.123047">Reply</tspan></text><line x1="1450.1844" y1="911.29135" x2="1529.1663" y2="911.29135" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="1083.53696" y="965.126" width="158" height="23" fill="white"/><text transform="translate(1088.53696 970.126)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".3112793" y="10" textLength="107.625977">Read request L2 confi</tspan><tspan font-family="Helvetica" font-size="11" font-weight="500" x="107.937256" y="10" textLength="39.751465">guration</tspan></text><line x1="653.03386" y1="983.626" x2="1619.2109" y2="983.626" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="1082.56314" y="1006.97245" width="120" height="23" fill="white"/><text transform="translate(1087.56314 1011.97245)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".27124023" y="10" textLength="69.706055">Reply L2 confi</tspan><tspan font-family="Helvetica" font-size="11" font-weight="500" x="69.977295" y="10" textLength="39.751465">guration</tspan></text><line x1="651.62047" y1="1025.47245" x2="1619.2109" y2="1025.47245" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="1636.2367" y="982.47245" width="91" height="23" fill="white"/><text transform="translate(1641.2367 987.47245)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".138916016" y="10" textLength="25.679199">Confi</tspan><tspan font-family="Helvetica" font-size="11" font-weight="500" x="25.818115" y="10" textLength="55.04297">guration L2</tspan></text><line x1="1714.1" y1="1003.97245" x2="1627.1043" y2="1003.97245" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="968.87606" y="1026.8268" width="148" height="23" fill="white"/><text transform="translate(973.87606 1031.8268)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".21240234" y="10" textLength="137.575195">Save instance network state</tspan></text><line x1="575.9" y1="1045.8268" x2="1324.30016" y2="1045.8268" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="988.211" y="1070.04335" width="134" height="23" fill="white"/><text transform="translate(993.211 1075.04335)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".2512207" y="10" textLength="123.49756">Pass network information</tspan></text><line x1="841.70705" y1="1088.54335" x2="1324.186" y2="1088.54335" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="1090.48636" y="1093.0118" width="133" height="23" fill="white"/><text transform="translate(1095.48636 1098.0118)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".3635254" y="10" textLength="122.27295"> [REST] Get volume data</tspan></text><line x1="1810.6" y1="1112.5118" x2="829.13385" y2="1112.5118" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="176.62598" y="1134.11025" width="15.944886" height="36" fill="#b1b1b1"/><rect x="176.62598" y="1134.11025" width="15.944886" height="36" stroke="#313131" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="205.80389" y="1112.748" width="188" height="23" fill="white"/><text transform="translate(210.80389 1117.748)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".43603516" y="10" textLength="7.336914">V</tspan><tspan font-family="Helvetica" font-size="11" font-weight="500" x="6.961914" y="10" textLength="170.60205">alidate auth-token and permissions</tspan></text><line x1="202.47086" y1="1134.748" x2="1820.5" y2="1134.748" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><path d="M 1810.6 1169.5625 L 658.00653 1169.5625 L 192.57086 1169.5625" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(210.37401 1153.61025)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x="1.8178711" y="10" textLength="235.42041">Update authorization headers with roles and acl </tspan></text><line x1="742.557" y1="1194.0335" x2="1816.6973" y2="1194.0335" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="842.11436" y="1200.2874" width="53" height="23" fill="white"/><text transform="translate(847.11436 1205.2874)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".106933594" y="10" textLength="42.786133">Start VM</tspan></text><line x1="1714.1" y1="1218.7874" x2="830.22047" y2="1218.7874" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="839.637" y="1227.33195" width="67" height="23" fill="white"/><text transform="translate(844.637 1232.33195)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".06274414" y="10" textLength="56.874512">Port update</tspan></text><line x1="1714.1" y1="1245.83195" x2="829.13385" y2="1245.83195" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><line x1="651.94724" y1="1275.5" x2="829.13385" y2="1275.5" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(681.2434 1262.5)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x="1.9958496" y="10" textLength="143.06445">rpc.call to Nova-conductor to </tspan><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".15356445" y="23" textLength="143.69287">fetch the instance information</tspan></text><rect x="761.6027" y="1295.8662" width="166" height="23" fill="white"/><text transform="translate(766.6027 1300.8662)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".038574219" y="10" textLength="155.92285">Subscribe new instance request</tspan></text><line x1="651.62047" y1="1317.8662" x2="929.4941" y2="1317.8662" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="786.2811" y="1320.1542" width="141" height="23" fill="white"/><text transform="translate(791.2811 1325.1542)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".37817383" y="10" textLength="130.24365">Publish new instance state</tspan></text><line x1="651.94724" y1="1342.1542" x2="929.4941" y2="1342.1542" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="831.623" y="1348.7992" width="131" height="23" fill="white"/><text transform="translate(836.623 1353.7992)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".27929688" y="10" textLength="120.441406">Pass volume information</tspan></text><line x1="1714.1" y1="1367.2992" x2="829.13385" y2="1367.2992" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="1123.1457" y="1397.2284" width="15.944886" height="36" fill="#b1b1b1"/><rect x="1123.1457" y="1397.2284" width="15.944886" height="36" stroke="#313131" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="1147.0902" y="1378.4803" width="88" height="23" fill="white"/><text transform="translate(1152.0902 1383.4803)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".18041992" y="10" textLength="77.63916">Get cluster map</tspan></text><line x1="1148.99056" y1="1397.4803" x2="1820.5" y2="1397.4803" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="1148.91004" y="1411.4803" width="68" height="23" fill="white"/><text transform="translate(1153.91004 1416.4803)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".26464844" y="10" textLength="57.470703">Return map</tspan></text><line x1="1810.6" y1="1431.4803" x2="1139.09056" y2="1431.4803" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><rect x="1149.35914" y="1444.0945" width="80" height="23" fill="white"/><text transform="translate(1154.35914 1449.0945)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".45581055" y="10" textLength="69.08838">Mount volume</tspan></text><line x1="1145.9743" y1="1464.0945" x2="1724.5497" y2="1464.0945" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(1920.5632 1549.5309)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" x=".031982422" y="10" textLength="81.936035">Return metadata</tspan></text><rect x="2005.454" y="1490.34965" width="16.058075" height="84.920733" fill="#b1b1b1"/><rect x="2005.454" y="1490.34965" width="16.058075" 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transform="translate(658.68012 776.72246)" fill="black"><tspan font-family="Helvetica" font-size="11" font-weight="500" fill="black" x="0" y="17" textLength="7.336914">V</tspan><tspan font-family="Helvetica" font-size="11" font-weight="500" fill="black" x="6.525879" y="17" textLength="105.799805">alidate the auth-token</tspan></text></g></g></svg>
diff --git a/doc/ops-guide/source/ops-customize-provision-instance.rst b/doc/ops-guide/source/ops-customize-provision-instance.rst
new file mode 100644
index 0000000000..d25350178f
--- /dev/null
+++ b/doc/ops-guide/source/ops-customize-provision-instance.rst
@@ -0,0 +1,12 @@
+=====================
+Provision an instance
+=====================
+
+To help understand how OpenStack works, this section describes the
+end-to-end process and interaction of components when provisioning an instance
+on OpenStack.
+
+**Provision an instance**
+
+.. figure:: figures/provision-an-instance.png
+   :width: 100%
diff --git a/doc/ops-guide/source/ops-customize.rst b/doc/ops-guide/source/ops-customize.rst
index 195b784b46..989bc5f7ec 100644
--- a/doc/ops-guide/source/ops-customize.rst
+++ b/doc/ops-guide/source/ops-customize.rst
@@ -5,6 +5,7 @@ Customization
 .. toctree::
    :maxdepth: 1
 
+   ops-customize-provision-instance.rst
    ops-customize-development.rst
    ops-customize-objectstorage.rst
    ops-customize-compute.rst