Update the documentation links

The documentation about "ops-guide" has been moved.

Change-Id: I151d1f989cb032c3a3775e5bfffcec58a2cf0121

api-ref/source/os-hosts.inc

@@ -99,7 +99,7 @@ Enables, disables a host or put a host in maintenance or normal mode.
   console, and is therefore useless. There are other APIs that allow you to do
   the same thing which are supported across all compute drivers, which would be
   disabling a service and then migrating the instances off that host. See the
-  `Operations Guide <https://docs.openstack.org/ops-guide/ops-maintenance-compute.html>`_
+  `Operations Guide <https://wiki.openstack.org/wiki/OpsGuide/Compute_Node_Failures_and_Maintenance>`_
   for more information on maintenance.
 
 Normal response codes: 200

doc/source/admin/networking-nova.rst

@@ -129,9 +129,6 @@ single ``nova-network`` service provides a default gateway for VMs and hosts a
 single DHCP server (dnsmasq). In multi-host mode, each compute node runs its
 own ``nova-network`` service. In both cases, all traffic between VMs and the
 internet flows through ``nova-network``. Each mode has benefits and drawbacks.
-For more on this, see the Network Topology section in the `OpenStack Operations
-Guide
-<https://docs.openstack.org/ops-guide/arch-network-design.html#network-topology>`__.
 
 All networking options require network connectivity to be already set up
 between OpenStack physical nodes. OpenStack does not configure any physical

doc/source/install/overview.rst

@@ -59,7 +59,7 @@ follows:
 
 For more information on production architectures, see the `Architecture Design
 Guide <https://docs.openstack.org/arch-design/>`_, `OpenStack Operations Guide
-<https://docs.openstack.org/ops-guide/>`_, and `OpenStack Networking Guide
+<https://wiki.openstack.org/wiki/OpsGuide>`_, and `OpenStack Networking Guide
 <https://docs.openstack.org/ocata/networking-guide/>`_.
 
 .. _figure-hwreqs: