Common OpenStack Deployments: Real World Examples for Systems Administrators and Engineers by Elizabeth K. Joseph & Matt Fischer

Author:Elizabeth K. Joseph & Matt Fischer [Joseph, Elizabeth K.]
Language: eng
Format: azw3
Publisher: Pearson Education
Published: 2016-09-15T04:00:00+00:00

Before we launch our Ubuntu instance, we’ll want to do some preliminary work to make sure the instance is accessible and usable when we bring it up. Once again in the left hand menu under Compute, select Access & Security where we will want to edit two sections.

The first section to edit will be Security Groups which will have a default group that we want to edit. Security Groups are used to filter network traffic, and by default there are only a few rules and while they allow outgoing traffic, they block incoming. This means that with the current default rules, you won’t be able to ping or SSH into your instances, which we will want. We’ll also add a rule to allow TCP traffic over port 80 for when we set up a web server in a later step. We’ll start with allowing ICMP ping to the systems, as illustrated in Figure 6.5. Rather than allowing all ICMP traffic, which is an option in the Rule dropdown, we can create a custom ICMP rule to only allow ping. To do this, use the following values:

Rule: Custom ICMP Rule

Direction: Ingress

Type: 8

Code: 0

Remote: CIDR

CIDR: 0.0.0.0/0

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