Merge pull request #203 from MCamp859/kata-docs-update

Updated kata and kata_migration tutorials.

source/clear-linux/tutorials/kata.rst

@@ -3,16 +3,16 @@
 Install Kata Containers\*
 #########################
 
-This tutorial describes how to install, configure and run Kata Containers\* on
-|CLOSIA|. Kata Containers is an open source project dedicated to the
-development of a lightweight implementation of Virtual Machines (VMs)
-offering the speed of containers and the security of VMs. 
+This tutorial describes how to install, configure, and run `Kata Containers`_
+on |CLOSIA|. Kata Containers is an open source project developing a
+lightweight implementation of :abbr:`VMs (Virtual Machines)` that offer the
+speed of containers and the security of VMs.
 
 Prerequisites
 *************
 
 This tutorial assumes you have installed |CL| on your host system.
-For detailed instructions on installing |CL| on a bare metal system, visit
+For detailed instructions on installing |CL| on a bare metal system, follow
 the :ref:`bare metal installation tutorial<bare-metal-install>`.
 
 If you have Clear Containers installed on your |CL| system, then follow the
@@ -28,24 +28,23 @@ Install Kata Containers
 ***********************
 
 Kata Containers is included in the :file:`containers-virt` bundle. To install the
-framework, enter:
+framework, enter the following command:
 
 .. code-block:: bash
 
    sudo swupd bundle-add containers-virt
 
-Configure Docker\* to use Kata Containers by default
+Configure Docker\* to use Kata Containers by default.
 
 .. code-block:: bash
 
    sudo mkdir -p /etc/systemd/system/docker.service.d/
-   cat <<EOF | sudo tee /etc/systemd/system/docker.service.d/kata-containers.conf
+   cat <<EOF | sudo tee /etc/systemd/system/docker.service.d/51-runtime.conf
    [Service]
-   ExecStart=
-   ExecStart=/usr/bin/dockerd -D --add-runtime kata-runtime=/usr/bin/kata-runtime --default-runtime=kata-runtime
+   Environment="DOCKER_DEFAULT_RUNTIME=--default-runtime kata-runtime"
    EOF
-   
-Restart the Docker and Kata Containers systemd services
+
+Restart the Docker and Kata Containers systemd services.
 
 .. code-block:: bash
 
@@ -61,9 +60,8 @@ Run Kata Containers
 
 .. note::
 
-   In cases where it is necessary to use a proxy server and your proxy
-   environment variables are already set, run the following commands as
-   a shell script to configure Docker:
+   If you use a proxy server and your proxy environment variables are already
+   set, run the following commands as a shell script to configure Docker:
 
    .. code-block:: bash
 
@@ -81,24 +79,28 @@ Run Kata Containers
 
 **Congratulations!**
 
-You have successfully installed and set up Kata Containers on |CLOSIA|.
+You've successfully installed and set up Kata Containers on |CLOSIA|.
 
-More information about Docker in |CLOSIA|
-*****************************************
+More information about Docker
+*****************************
 
-Docker on |CLOSIA| provides a docker.service service file to start the Docker
-daemon. The daemon will use runc or kata-runtime depending on 
-the environment:
+Docker on |CLOSIA| provides a :file:`docker.service` file to start the Docker
+daemon. The daemon will use runc or kata-runtime depending on the
+environment:
 
-If you are running |CL| on bare metal or on a VM with Nested
-Virtualization activated, Docker will use kata-runtime as the
-default runtime. If you are running |CL| on a VM without Nested
-Virtualization, Docker will use runc as the default runtime. It is not
-necessary to manually configure the runtime for Docker, since Docker itself
-will automatically use the one supported by the system.
+*  If you are running |CL| on bare metal or on a VM with Nested
+   Virtualization activated, Docker uses kata-runtime as the
+   default runtime.
+*  If you are running |CL| on a VM without Nested Virtualization,
+   Docker uses runc as the default runtime.
 
-To check which runtime your system is using, run:
+You do not need to manually configure the runtime for Docker, because
+it automatically uses the runtime supported by the system.
+
+Check which runtime your system is using with the command:
 
 .. code-block:: bash
 
    sudo docker info | grep runtime
+
+.. _Kata Containers: https://katacontainers.io/

source/clear-linux/tutorials/kata_migration.rst

@@ -37,14 +37,6 @@ Make any required changes before continuing this process.
 
   You do not need to manually remove any Clear Containers packages.
 
-Disable Clear Containers manager configuration
-**********************************************
-
-Remove the Clear Containers configuration file: 
-
-.. code-block:: bash
-
-    sudo rm /etc/systemd/system/docker.service.d/clear-containers.conf
 
 Enable Kata Containers as default
 *********************************
@@ -54,10 +46,9 @@ Enable Kata Containers as default
    .. code-block:: bash
 
       sudo mkdir -p /etc/systemd/system/docker.service.d/
-      cat <<EOF | sudo tee /etc/systemd/system/docker.service.d/kata-containers.conf
+      cat <<EOF | sudo tee /etc/systemd/system/docker.service.d/51-runtime.conf
       [Service]
-      ExecStart=
-      ExecStart=/usr/bin/dockerd -D --add-runtime kata-runtime=/usr/bin/kata-runtime --default-runtime=kata-runtime
+      Environment="DOCKER_DEFAULT_RUNTIME=--default-runtime kata-runtime"
       EOF
 
 #. Restart the Docker systemd services.