docs: Updated "VPP with Containers" use-case section

Type: improvement

Modified "VPP with Containers" doc section to run on Ubuntu 22.04 LTS.

Change-Id: Ic09b88cf0e3b492711222a1bb24552de964a7d03
Signed-off-by: hsandid <halsandi@cisco.com>

docs/usecases/containers/Routing.rst

@@ -63,11 +63,9 @@ Run some commands to verify the changes:
     32: veth_link1    inet 172.16.1.2/24 scope global veth_link1\       valid_lft forever preferred_lft forever
     32: veth_link1    inet6 fe80::2c9d:83ff:fe33:37e/64 scope link \       valid_lft forever preferred_lft forever
 
-    root@cone:/# route
+    root@cone:/# ip route
-    Kernel IP routing table
+    default via 172.16.1.1 dev veth_link1
-    Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
+    172.16.1.0/24 dev veth_link1 proto kernel scope link src 172.16.1.2
-    default         172.16.1.1      0.0.0.0         UG    0      0        0 veth_link1
-    172.16.1.0      *               255.255.255.0   U     0      0        0 veth_link1
 
 
 We see that the IP has been assigned, as well as our default gateway.

docs/usecases/containers/containerCreation.rst

@@ -19,7 +19,7 @@ Then install packages for containers such as lxc:
 
   # apt-get install bridge-utils lxc
 
-As quoted from the `lxc.conf manpage <https://linuxcontainers.org/it/lxc/manpages/man5/lxc.conf.5.html>`_,  "container configuration is held in the config stored in the container's directory.
+As quoted from the `lxc.conf manpage <https://linuxcontainers.org/lxc/manpages/man5/lxc.conf.5.html>`_,  "container configuration is held in the config stored in the container's directory.
 A basic configuration is generated at container creation time with the default's recommended for the chosen template as well as extra default keys coming from the default.conf file."
 
 "That *default.conf* file is either located at /etc/lxc/default.conf or for unprivileged containers at ~/.config/lxc/default.conf."
@@ -31,10 +31,10 @@ Look at the contents of *default.conf*, which should initially look like this:
 .. code-block:: console
 
     # cat /etc/lxc/default.conf
-    lxc.network.type = veth
+    lxc.net.0.type = veth
-    lxc.network.link = lxcbr0
+    lxc.net.0.link = lxcbr0
-    lxc.network.flags = up
+    lxc.net.0.flags = up
-    lxc.network.hwaddr = 00:16:3e:xx:xx:xx
+    lxc.net.0.hwaddr = 00:16:3e:xx:xx:xx
 
 As you can see, by default there is one veth interface.
 
@@ -44,36 +44,36 @@ You can do this by piping *echo* output into *tee*, where each line is separated
 
 .. code-block:: console
 
-    # echo -e "lxc.network.name = veth0\nlxc.network.type = veth\nlxc.network.name = veth_link1"  | sudo tee -a /etc/lxc/default.conf
+    # echo -e "lxc.net.0.name = veth0\nlxc.net.1.type = veth\nlxc.net.1.name = veth_link1"  | sudo tee -a /etc/lxc/default.conf
 
 Inspect the contents again to verify the file was indeed modified:
 
 .. code-block:: console
 
     # cat /etc/lxc/default.conf
-    lxc.network.type = veth
+    lxc.net.0.type = veth
-    lxc.network.link = lxcbr0
+    lxc.net.0.link = lxcbr0
-    lxc.network.flags = up
+    lxc.net.0.flags = up
-    lxc.network.hwaddr = 00:16:3e:xx:xx:xx
+    lxc.net.0.hwaddr = 00:16:3e:xx:xx:xx
-    lxc.network.name = veth0
+    lxc.net.0.name = veth0
-    lxc.network.type = veth
+    lxc.net.1.type = veth
-    lxc.network.name = veth_link1
+    lxc.net.1.name = veth_link
 
 
 After this, we're ready to create the containers.
 
-Creates an Ubuntu Xenial container named "cone".
+Creates an Ubuntu Focal container named "cone".
 
 .. code-block:: console
 
-      # lxc-create -t download -n cone -- --dist ubuntu --release xenial --arch amd64 --keyserver hkp://p80.pool.sks-keyservers.net:80
+      # lxc-create -t download -n cone -- --dist ubuntu --release focal --arch amd64
 
 
 If successful, you'll get an output similar to this:
 
 .. code-block:: console
 
-    You just created an Ubuntu xenial amd64 (20180625_07:42) container.
+    You just created an Ubuntu focal amd64 (20231027_07:42) container.
 
     To enable SSH, run: apt install openssh-server
     No default root or user password are set by LXC.
@@ -83,8 +83,7 @@ Make another container "ctwo".
 
 .. code-block:: console
 
-     # lxc-create -t download -n ctwo -- --dist ubuntu --release xenial --arch amd64 --keyserver hkp://p80.pool.sks-keyservers.net:80
+     # lxc-create -t download -n ctwo -- --dist ubuntu --release focal --arch amd64
-
 
 List your containers to verify they exist:
 
@@ -106,9 +105,9 @@ And verify its running:
 .. code-block:: console
 
     # lxc-ls --fancy
-    NAME STATE   AUTOSTART GROUPS IPV4 IPV6
+    NAME STATE   AUTOSTART GROUPS IPV4 IPV6 UNPRIVILEGED
-    cone RUNNING 0         -      -    -
+    cone RUNNING 0         -      -    -    false
-    ctwo STOPPED 0         -      -    -
+    ctwo STOPPED 0         -      -    -    false
 
 
 .. note::

docs/usecases/containers/containerSetup.rst

@@ -18,10 +18,9 @@ Run the linux DHCP setup and install VPP:
 
 .. code-block:: console
 
-    root@cone:/# resolvconf -d eth0
     root@cone:/# dhclient
-    root@cone:/# apt-get install -y wget
+    root@cone:/# apt-get install -y curl
-    root@cone:/# echo "deb [trusted=yes] https://nexus.fd.io/content/repositories/fd.io.ubuntu.xenial.main/ ./" | sudo tee -a /etc/apt/sources.list.d/99fd.io.list
+    root@cone:/# curl -s https://packagecloud.io/install/repositories/fdio/release/script.deb.sh | sudo bash
     root@cone:/# apt-get update
     root@cone:/# apt-get install -y --force-yes vpp
     root@cone:/# sh -c 'echo  \"\\ndpdk {\\n   no-pci\\n}\" >> /etc/vpp/startup.conf'

docs/usecases/containers/index.rst

@@ -5,6 +5,7 @@ VPP with Containers
 
 This section will cover connecting two Linux containers with VPP. A container is essentially a more efficient and faster VM, due to the fact that a container does not simulate a separate kernel and hardware. You can read more about `Linux containers here <https://linuxcontainers.org/>`_.
 
+This section has been tested with Ubuntu 22.04 LTS.
 
 .. toctree::