Ytukyg

Here is the cloud.cfg on my instance (I had tampered it manually when provisioning the ami from which I launched the instance)

root@ip-10-17-0-121:~# cat /etc/cloud/cloud.cfg | grep -i resol -C 3



# Network configuration for ami

manage_resolv_conf: true



resolv_conf:

  nameservers: ['10.11.4.1']

However this is never taken into account given that:

# cat /etc/resolv.conf 

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)

#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN

nameserver 10.17.0.2

search eu-west-1.compute.internal

I have tried with and without creating the following file

# cat /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg

network: {config: disabled}

I managed to make my instance obtain my custom dns-nameserver as follows

- name: pre_tasks --> Add my custom dns-nameserver

  lineinfile:

   path: /etc/dhcp/dhclient.conf

   regexp: '^#prepend domain-name-servers'

   line: 'prepend domain-name-servers 10.11.4.1;'

  become: yes

However now I am getting the following warning:

pkara@ip-10-17-0-35:~$ sudo -i

sudo: unable to resolve host ip-10-17-0-35

not accepting my answer until / unless I address this;

edit_1: adding this to my cloud-config.yml which I am setting as user data did not help much:

hostname: localhost

manage_etc_hosts: true

edit_2: adding this to my cloud-config.cfg helped me to address the above unable to resolve host problemn

bootcmd:

  - echo "127.0.0.1 $(hostname)" >> /etc/hosts