hcia-cloud computing guide to setting up the lab environment

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HCIA-Cloud Computing Training Courses

HCIA-Cloud Computing

Guide to Setting Up the Lab Environment

Version: 4.0

Huawei Technologies Co., Ltd.

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HCIA-Cloud Computing Guide to Setting Up the Lab Environment Page1






Contents

1 Lab Environment Introduct ion .................................................................................................. 3

1.1 Lab Environment ............................................................................................................. 3

1.2 Devices in Lab Environments ............................................................................................. 3

1.3 Software and Tools .......................................................................................................... 3

2 Installing CentOS 7.3 ................................................................................................................. 3

2.1 Preparations................................................................................................................... 3

2.1.1 Downloading the CentOS 7.3 ISO Image from the Official Website ................................... 3

2.2Installing CentOS 7.3 ........................................................................................................ 4

2.2 Upgrading QEMU ............................................................................................................. 6

3 Init ial Configurat ions ................................................................................................................ 6

3.1 Enabling Nested Virtualization .......................................................................................... 6

3.2 Initial Network Configuration ........................................................................................... 7

3.3 Disabling SELinux ............................................................................................................ 9

3.4 Clearing iptables Rules ..................................................................................................... 9

3.5 Expanding the Root Partition ............................................................................................ 9

3.6 Other Configuration....................................................................................................... 11

4 Creat ing a CNA Node .............................................................................................................. 11

5 Adding Storage Configurat ions ............................................................................................... 12

5.1 Enabling the NFS Server ................................................................................................. 12

5.2 Configuring the iSCSI Target ........................................................................................... 13




1 Lab Environment Introduct ion

1.1 Lab Environment

This document describes how to build a HCIA-Cloud Computing v4.0 lab environment using CentOS 7.3 and nested virtualization. If the hardware configuration of the server is consistent with the recommended configuration, the lab environment should be able to support hands-on experience by five trainees at the same time.

Note:

The VMs used by the five trainees run on the same switch. Plan the IP addresses carefully to avoid IP address conflicts. During the lab, the trainees must use the planned IP addresses to perform the required operations.

1.2 Devices in Lab Environments

To meet the HCIA-Cloud Computing lab requirements, you are advised to use the following configurations in each lab environment:

The following table lists the devices required.

Device Model Quantity

Server RH1288V5 1

Switch S5700 1

1.3 Software and Tools

This lab allows you to install and experience FusionCompute R6.3.1. You will need to use the following tools:

FusionCompute 6.3

CentOS 7.3 image file

PuTTY

VNC-viewer

WinSCP

2 Installing CentOS 7.3

2.1 Preparations

2.1.1 Downloading the CentOS 7.3 ISO Image from the Official Website

Download address: http://archive.kernel.org/centos-vault/7.3.1611/isos/x86_64/




2.2Installing CentOS 7.3

Step 1 Log in to the server through the BMC. Mount the CentOS 7.3 ISO file to the server, and set the boot mode to booting from virtual DVD-ROM drive.

Mount the CentOS 7.3 image file as follows:

Step 2 Install CentOS 7.3.

Select Install CentOS Linux 7.




Set LANGUAGE SUPPORT and DATE & TIME, and then set SOFTWARE SELECTION and INSTALLATION DESTINATION.

During the installation, set the password of the root user.

----End




2.2 Upgrading QEMU

When nested virtualization is used, the default QEMU cannot identify some of the parameters. You must upgrade QEMU to 3.1.0. After CentOS 7.3 is connected to the Internet, run the following commands to install QEMU. The installation process takes about 1.5 hours. The commands are as follows:

Command 1: wget http://www.qemu.org/download/qemu-3.1.0.tar.bz2

Command 2: yum -y install gcc gcc-c++ automake libtool zlib-devel glib2-devel bzip2-devel

libuuid-devel spice-protocol spice-server-devel usbredir-devel libaio-devel

Command 3: tar xf qemu-3.1.0.tar.bz2

Command 4: cd qemu-3.1.0

Command 5: ./configure --enable-usb-redir --enable-libusb --enable-spice --enable-uuid

--enable-kvm --enable-bzip2 --prefix=/usr/local/qemu --enable-linux-aio --enable-system

Command 6: make && make install

Command 7: ln -s /usr/local/qemu/bin/qemu-system-x86_64 /usr/bin/qemu-kvm

Command 8: qemu-kvm –version

After command 8 is executed, if version 3.1.0 is displayed, the installation is complete.

3 Init ial Configurat ions

3.1 Enabling Nested Virtualization

Step 1 Run the vi command to open the /etc/modprobe.d/kvm-nested.conf file and add the following content:

Step 2 Run the following command to enable nested virtualization:

modprobe -r kvm_intel

modprobe -a kvm_intel

Step 3 Run the following command to check whether nested virtualization is enabled:

cat /sys/module/kvm_intel/parameters/nested

If the output is N, nested virtualization is disabled. If the output is Y, it is enabled.




----End

3.2 Initial Network Configuration

If after recovery, the system cannot automatically identify the NICs of the server, you need to manually configure network information. Two bridges, br0 and br1, are planned. br0 is used to carry management traffic, and br1 storage traffic. Run the ethtool command to check the network port information.

Step 1 Enter the /etc/sysconfig/network-scripts directory.

Step 2 Add the NIC configuration file. The following uses enp129s0f0 and enp130s0f0 as an example.

Copy the existing configuration file of enp2s0f1 and rename them into enp129s0f0 and enp130s0f0.

Step 3 Modify the configuration files as follows:

Step 4 Copy the configuration file of br0 to add br1. If the configuration file of br0 does not exist, run the vi ifcfg-br0 command to add it.

Step 5 Modify the configuration files of br0 and br1 as follows:




Step 6 Run the following command to restart the network service.

Step 7 Check the bridge configuration.

Step 8 Test the network connectivity.

----End




3.3 Disabling SELinux

Step 1 Run the vi command to modify the config file in /etc/selinux as follows:

Step 2 Restart the server for the change to take effect.

----End

3.4 Clearing iptables Rules

Step 1 To avoid the failure to log in to the VM using VNC, run the following command to clear all iptables rules:

iptables –F

iptables –P INPUT ACCEPT

iptables –P FORWARD ACCEPT

Because the iptables service is not installed, the change made to the iptables rules cannot be saved. The change will be lost after a server restart. You are advised to connect the server to the Internet and run the yum command to install iptables to have the configuration saved.

----End

3.5 Expanding the Root Partition

Step 1 Check the IDs of the existing disks.

In the following example, the entire sdc disk is added as the root partition.




Step 2 Create a physical volume (PV).

Step 3 Add the created PV to an existing volume group (VG).

Check the existing VGs.

Run the vgextend command to add the created PV to an existing VG.

Step 4 Expand the logical volume corresponding to the root partition.

Step 5 Make the configuration take effect.




Step 6 Check the size of the expanded root partition.

----End

3.6 Other Configuration

Step 1 Modify the permissions of /dev/kvm.

----End

4 Creat ing a CNA Node

Step 1 Upload the software package.

Use WinSCP to upload the CNA image file to the specified folder. The following uses /tmp/ISO as an example.

Log in to CentOS.

Enter /tmp/ISO to upload the software package.

Step 2 Create a disk file required by the CNA node.




Step 3 Create a CNA VM.

Run the following command to create a CNA VM:

virt-install --name CNA1 --memory 20480 --vcpu sockets=2,cores=2,threads=8 --cpu host-model,+vmx

--sysinfo host --disk path=/tmp/img/CNA1.qcow2 --disk path=/tmp/ISO/F1.iso,device=cdrom

--network bridge=bridge0,model=e1000 --network bridge=bridge0,model=e1000 --network

bridge=bridge1,model=e1000 --network bridge=bridge1,model=e1000 --vnclisten=192.168.152.116

--vncport=5900 --vnc --noautoconsole --boot cdrom

Step 4 Modify the CNA configuration to set the memory upper limit.

Run the virsh edit CNA1 command to add the following parameters to the configuration file:

<memtune><soft_limit unit='KiB'>1677736</soft_limit></memtune>

----End

5 Adding Storage Configurat ions

5.1 Enabling the NFS Server

Step 1 Create a shared directory for the NFS service.

Step 2 Run the following command to modify the configuration file:

vi /etc/exports




Add the following content to the configuration file:

Step 3 Run the following command to restart the NFS server:

Step 4 Start the NFS service to check whether the configuration has taken effect.

----End

5.2 Configuring the iSCSI Target

Step 1 Run the systemctl status target command to enable the service.

Step 2 Create an LV in the existing VG to use as the disk space.




Step 3 Create the iSCSI target.

Create a block storage.

Configure the iSCSI target naming convention.

Create a LUN.

Create an IP Address and port.

Create an ACL and allow iSCSI client connections.

Create 10 clients in the same way.




Modify the WWNs of all CNA hosts.

----End

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