Shulou(Shulou.com)06/03 Report--

Part IV: the functions of establishing nfs shared storage, installing virtual machines and testing clusters

Establish a nfs storage source

Prepare a centos7/8 server and install the nfs service

Create a new virtual machine in the host VMware-workstation

Select Linux and centos7 67 bits for operating system type

The virtual machine name is set to centos-nfs, and the location selection is in the same directory as the previous esxi host for management

Cpu4 core memory 4096m network temporarily select the bridge network, the hard disk first create a 20g to install the system, and then add a large hard disk as a nfs shared disk (actually need to add 2 shared disks, do not add here, then add later)

Delete the sound card and printer after creation, and change the bridged network to custom, and connect to the storage network VMNet1.

Mount the installation iso of centos and install the centos system. The installation process will not be discussed here.

If you need to connect to the external network during the installation process, you can add another network card and choose the bridging mode.

After installing the system, configure the hostname, network, selinux, firewall, etc.

Hostname: centos-nfs

Ip:192.168.10.254/24,10.8.20.254/24 (required to connect to the public network)

Close selinux

Turn off the firewall

Update the system

Add a 500g hard disk to this centos server

After restarting the server, partition, format, mount it to the nfs directory under the root directory, and write it to fstb to achieve automatic mount.

Zoning

Fdisk / dev/sdb

N

P

Enter twice

W

Formatting

Mk2fs.ext4 / dev/sdb1

Mounting

Mkdir / nfs

Mount / dev/sdb1 / nfs

Power on and mount automatically

Vi / etc/fstab

Add the following to the end of the file:

/ dev/sdb1 / nfs ext4 defaults 0 0

After configuration, follow these steps to install the nfs service:

Step1: install NFS server-side software

Yum-y install nfs-utils rpcbind

Step2: configuring the NFS directory

Vi / etc/exports

Add the following:

/ nfs 192.168.10.0 Compact 24 (rw,sync,no_root_squash)

Export nfs directory

Exportfs-rav

Step3: start the service

Systemctl enable rpcbind

Systemctl start rpcbind

Systemctl enable nfs-server

Systemctl start nfs-server

Nfs service installation completed

Add nfs Stora

Right-click in vCenter's cluster Cluster1 and select "Storage" → "create a new datastore."

Open the wizard

→ Select nfs

→ version nfs 4.1

→ data store name: share-datastore-nfs

Folder: / nfs

Server: 192.168.10.254

→ does not use kerberos authentication

→ host accessibility Select all 3 hosts

→ completed

The completed data storage is shown below:

At the same time, this nfs storage can be seen in the data store of each host.

Indicates that the shared storage was established successfully.

Open the function of the cluster

Now you can create a new virtual machine to test the effect of the cluster.

Enable the DRS and HA functions of the cluster

Finally, there will be the following prompt that you need to add a shared storage for the esxi host for data detection

Create another shared directory on the centos server. For simplicity, we directly use the first disk (system disk) of centos as the share (normally we should add another hard disk and mount it to the / nfs1 directory below)

Mkdir / nfs1

Modify .etc / exports to add a line

/ nfs 192.168.10.0 Compact 24 (rw,sync,no_root_squash)

/ nfs1 192.168.10.0 Compact 24 (rw,sync,no_root_squash)

Restart the nfs service

Systemctl restart rpcbind

Systemctl restart nfs-server

Then add the second shared storage disk to vCenter, named share-datastore-nfs1

Then modify the settings of HA

So there will be no hints.

Test cluster

Create an iso directory on the shared storage share-datastore-nfs to store the iso image where the virtual machine operating system is installed, and upload the iso file to it

When uploading a file, the following prompt appears

Let's solve it.

The browser enters https://10.8.20.250, the address of vCenter, and downloads the trusted root certificate on the right

Will get win/linux/mac3 certificates.

Import the win version of the certificate into the browser

Open the browser Settings → Privacy Settings and Security → Management Certificate → import, find the certificate you just downloaded, and import the xxx.crt import under the win folder.

After the import is complete, restart the browser, and then open vcenter to upload the file.

Install a centos virtual machine to test the functionality of the cluster

Note that when installing virtual machines to choose storage, be sure to choose to install on the shared storage share-datastore-nfs.

The specific process of installing a virtual machine will not be described in detail.

Migration during virtual machine shutdown

You can migrate from one host to another, changing only computing resources.

The network card configuration of the virtual machine selects the VM Network,IP address set to the 10.8.20.0 network segment, which can connect to the external network.

Install CentOS8 from the network

Installation succeeded

You can then test the cluster for DRS automatic migration, manual migration, simulated host unresponse, and so on.

The full text is over.

Welcome to my technical blog: memories in autumn

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.