DevOps Classroom Series – 08/Mar/2020

Ansible User Configuration

  • In this series, lets create a user called as admin.
  • If your vm is in AWS or any other virtualization provider with only key based authentication, we need to enable password based authentication.
File Location: /etc/ssh/sshd_config
Content: Password Authentication no => yes
service sshd restart

  • Create a user devops
adduser devops
  • This user devops needs to have sudo permissions and it is for automation

and add the following line
  • Repeat the above steps for node1
  • Now login into the acs and create a key pair
  • To copy the generated public key to node the following command is used. (If machines belong to same network prefer private ip addresses)
ssh-copy-id devops@<nodeipaddress>

  • If the copy is succesful, then you can login from acs to node1 directly by ipaddress or hostname
ssh <nodeipdaddress>
  • Ensure you are in acs and create a file called as inventory with node’s ip address
touch inventory
echo '' >> inventory
  • Now lets test whether ansible can connect to node
ansible -i <path to inventory> -m ping all

# This should be success
  • Now lets add one more entry to inventory and test using ansible ping
echo 'localhost' >> inventory
ansible -i inventory -m ping all

# ping will be successful for node and failed for localhost
  • It has failed for localhost, because the user ‘devops’ is not configured to login. to fix this lets do the following
ssh-copy-id devops@localhost

ansible -i inventory -m ping all
# success for node and localhost
  • Exercise: Create a centos machine and configure it to acs.

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