Lab 1.1 - Prep CentOS¶

Note

This installation will utilize centOS v7.5.
SSH keys were configured to allow the jumphost to login without a passwd as well as between the master & nodes to facilitate the Ansible playbooks.

Important

The following commands need to be run on all three nodes unless otherwise specified.

From the jumpbox open mRemoteNG and start a session to each of the following servers. The sessions are pre-configured to connect with the default user “centos”.
- ose-master1
- ose-node1
- ose-node2
For your convenience we’ve already added the host IP & names to /etc/hosts. Verify the file
```
cat /etc/hosts
```
The file should look like this:

If entries are not there add them to the bottom of the file be editing “/etc/hosts” with ‘vim’
```
sudo vim /etc/hosts

#cut and paste the following lines to /etc/hosts

10.3.10.21    ose-master1
10.3.10.22    ose-node1
10.3.10.23    ose-node2
```

Ensure the OS is up to date

sudo yum update -y

#This can take a few seconds to several minutes depending on demand to download the latest updates for the OS.

Install the docker packages

sudo yum install -y docker
sudo systemctl start docker && sudo systemctl enable docker

Verify docker is up and running
```
sudo docker run --rm hello-world
```
If everything is working properly you should see the following message

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