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2. Click on it and to the right under Attributes, there’ll be another tiny disc icon. |
3. Click on that, and it’ll ask you to Choose Optical Virtual Disk File. |
4. Locate on your hard drive the Minimal ISO you downloaded from CentOS, |
and choose it. |
5. The Storage Tree should now show the CentOS ISO. |
• Network: Adaptor 1 |
Attached to: Bridged Adapter |
Start up the machine you’ve just created, and it should take you through a basic |
installation of CentOS. Here are a few items you’ll want to specify (for anything else, |
the defaults should do): |
• Date and time: Adjust to your time zone if you wish. |
• Network and host name: Ethernet—toggle from off to on (it should immediately |
grab an IP address from your network; if not, set one manually). Press the Done |
button. |
• Installation destination: It may require you to confirm the target, but you |
shouldn’t need to change anything. Press the Done button. |
• That’s it. Begin Installation. |
While the installation is taking place, set the root password, and also create a user |
named astmin. Make the astmin user an administrator. |
28 |
| |
Chapter 3: Installing Asterisk |
The installation will take a few minutes. Grab a coffee! |
Once the install is done, the installer will ask you to Reboot. The reboot should only |
take 15 seconds or so. |
Congratulations, your system is ready. Log in as root. |
Linux (OpenStack) Host |
You’ll obviously need an account with a hosted Linux provider if you’re going to use |
this method (we’ve found OpenStack-based offerings to be the cheapest, relative to |
the quality/performance/simplicity offered). We’ve been using DigitalOcean for many |
years, but have also found Linode and VULTR to be strong providers in this space.6 |
Once you’ve got that sorted, you can log in and create a new system something like |
the following: |
• CentOS 7 (lastest version, 64-bit) |
• 4 GB 2vCPUs (we don’t really need the 4 GB RAM, but it is good to have the |
2xCPUs; you can probably get away with 2 GB 1vCPU, if you’re really cost- |
conscious) |
• Data center closest to you |
Once that’s up and running, log in as the default user (as of this writing, it’s centos). |
Note that DigitalOcean instances do not have a firewall by default. |
Instead, they provide a firewall as a part of their environment. The |
system you build will therefore not have any native firewall in |
place, and will be subject to external attacks shortly after you com‐ |
plete configuration (you’ll see this on the Asterisk console). Differ‐ |
ent providers will have different firewall policies. You are |
responsible for making sure your firewalling is working correctly. |
We’ll be discussing security and anti-fraud in more detail later on |
in this book. |
Dependencies |
The system you’ve just built isn’t really much more than a basic bootstrapped system. |
In order to prepare it for an Asterisk installation, there are a few things we’ll need to |
install first. |
6 Amazon’s new Lightsail service also promises to simplify the creation of hosted Linux machines. |
Dependencies |
| |
29 |
The following commands can be typed from the command line, or added to a simple |
shell script and run that way. |
sudo yum -y update && |
sudo yum -y install epel-release && |
sudo yum -y install python-pip && |
sudo yum -y install vim wget dnf&& |
sudo pip install alembic ansible && |
sudo pip install --upgrade pip && |
sudo mkdir /etc/ansible && |
sudo chown astmin:astmin /etc/ansible && |
sudo echo "[starfish]" >> /etc/ansible/hosts && |
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