Universal Agent Manager - CentOS 8 Deployment

Pre-requisites for installation on CentOS 8

Ensure the host can connect to public URLs on the Internet.
Ensure that the user that will run Ansible command can run sudo command without prompt.
Run the following line in an SSH session where you did not previously run any sudo command:
```
sudo ls
```
If the previous command still asks for a password, you can use the next command to avoid it:
```
sudo /bin/bash -c "echo \"$(whoami) ALL=(ALL:ALL) NOPASSWD: ALL\" >> /etc/sudoers "
```
Ensure you can access the host through SSH using its main service IP address. It should be also possible to open an SSH connection from the same host using that IP address.
Ensure python3 is installed.
Check if python3 is installed with following command:
```
python3 --version
```
If the previous command return errors, you can install python3 with next command:
```
sudo yum install python3
```
Download the Devo UAM software, copy it to your home folder and extract it using:
```
cd $HOME
tar -zxvf devo-ua-deployer.tgz
```
Download the Devo domain certs:
- Connect to your Devo domain web interface.
- Access to Administration -> Credentials in the left pane.
- Select X.509 certificates in the upper menu.
- Select your certificate, download them and rename them as:
  - Click on CHAIN CA in the upper right corner ->chain.crt.
  - Click on certificate on the certificate row -> domain.crt.
  - Click on private key on the certificate row -> domain.key.
- Copy the files to $HOME/devo-ua-deployer/domain-certs.

Installation on CentOS 8

Check that user configured can run sudo command without prompt.
Run the following line in an SSH session where you did not previously run any sudo command:
```
sudo ls
```
If the previous command still asks for a password, you can use the next command to avoid it:
```
sudo /bin/bash -c "echo \"$(whoami) ALL=(ALL:ALL) NOPASSWD: ALL\" >> /etc/sudoers "
```
Check python3 is installed with following command:
```
python3 --version
```
If the previous command returns errors, you can install python3 with next command:
```
sudo yum install python3
```

Install Ansible from ansible-29 repository:

sudo yum install centos-release-ansible-29
sudo yum install ansible

Change the working directory to the path where the installation package was extracted:
```
cd $HOME/devo-ua-deployer
```

Install the Ansible playbooks' dependencies:

ansible-galaxy install -r playbooks/roles/requirements.yaml

Edit the inventories/py3-1host-example.yaml file.
Set the following properties under all.hosts.devo-ua-manager yaml section:
- ansible_host: Devo Universal Agent Manager IP. Agents and web interface will use this IP.
- ansible_user: User that will run Devo UAM. The same user as the one that has been configured previously in sudoers.
- ansible_password: Password.
And the following properties under all.vars yaml section:
- duam_relay_entrypoint : tcp://FQDN_CENTRAL_RELAY:443. Where FQDN_CENTRAL_RELAY is the FQDN of your central Devo relay. To know what is the entrypoint corresponding to the used domain, follow the next steps (to send the data via a Devo Relay instead of sending it directly to Devo see the appendix below):
  - Access to Devo Web Interface with your credentials.
  - Go to Administration -> Relays in the left pane.
  - Copy the field Address of the central relay.
Create docker/user/config.json file with valid empty JSON body:
```
echo '{}' > docker/user/config.json
```

Run Ansible playbook:

ansible-playbook -i inventories/py3-1host-example.yaml playbooks/devo-universal-agent.yaml

Now you can connect to server app using https://DUAM_IP:8080, where DUAM_IP is the Devo Universal Agent Manager IP (default passwords are saved in duam_admin_passwd property in inventory file).

The endpoints (please refer to Universal Agent Deployment) should be automatically detected and listed as an active host. If the website was already opened before adding the host, a page refresh is required. This is an example screenshot:

UA Manager services:

To check the status port 8080:
```
systemctl status devo-ua-manager
```
To check the status port 8081:
```
systemctl status nginx
```

Send data to a relay instead of Devo

When configuring the parameter duam_relay_entrypoint in the inventory file, input the IP and port of the desired relay (in the below example, the relay is located in 192.168.43.147 and uses the port 13000).

Add the parameters with blank value as in the snippet below:

all: 
vars: 
... 
duam_relay_entrypoint: tcp://192.168.43.147:13000 
duam_devo_key: "" 
duam_devo_cert: "" 
duam_devo_chain: "" 
...

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