doc: Add Cilium container networking control flow

This patch adds a control flow diagram that explains the cilium container networking IP address Management with IPAM and with default Kubernetes Cluster Node Pool CIDR. Signed-off-by: Swaminathan Vasudevan <svasudevan@suse.com>
cilium · Feb 29, 2020 · b758cee · b758cee
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diff --git a/Documentation/concepts/ipam/cilium_container_networking_control_flow.png b/Documentation/concepts/ipam/cilium_container_networking_control_flow.png
diff --git a/Documentation/concepts/ipam/index.rst b/Documentation/concepts/ipam/index.rst
@@ -10,8 +10,23 @@
 Address Management
 ******************
 
+Before we look into the details of Address Management in Cilium, let us
+look at overview of the cilium container networking control flow.
+
+Cilium Container Networking Control Flow
+----------------------------------------
+
+The control flow picture below gives an overview about how the containers
+obtain its IP Address from the IPAM for different modes of Address Management
+that Cilium Supports.
+
+.. image:: cilium_container_networking_control_flow.png
+    :align: center
+
 Cilium supports multiple different address management modes:
 
+Address Management Modes
+------------------------
 .. toctree::
    :maxdepth: 1
    :glob: