AWC: 2 hostnames on EC2 instance from custom AMI

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I am pre-baking an AMI from which to launch some instances;

The only networking configuration I make, is to add a custom dns as follows:

prepend domain-name-servers 10.3.4.1;

in the ami's /etc/dhcp/dhclient.conf;

Then, in an instance I launch from this ami:

root@ip-10-17-0-114:~# cat /etc/hostname

ip-10-17-0-15

root@ip-10-17-0-114:~# hostname

ip-10-17-0-114

Is this behavior normal?

asked Nov 20 at 7:24

pkaramol

1,86511438

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up vote
0
down vote

favorite

I am pre-baking an AMI from which to launch some instances;

The only networking configuration I make, is to add a custom dns as follows:

prepend domain-name-servers 10.3.4.1;

in the ami's /etc/dhcp/dhclient.conf;

Then, in an instance I launch from this ami:

root@ip-10-17-0-114:~# cat /etc/hostname

ip-10-17-0-15

root@ip-10-17-0-114:~# hostname

ip-10-17-0-114

Is this behavior normal?

asked Nov 20 at 7:24

pkaramol

1,86511438

add a comment |

up vote
0
down vote

favorite

I am pre-baking an AMI from which to launch some instances;

The only networking configuration I make, is to add a custom dns as follows:

prepend domain-name-servers 10.3.4.1;

in the ami's /etc/dhcp/dhclient.conf;

Then, in an instance I launch from this ami:

root@ip-10-17-0-114:~# cat /etc/hostname

ip-10-17-0-15

root@ip-10-17-0-114:~# hostname

ip-10-17-0-114

Is this behavior normal?

asked Nov 20 at 7:24

pkaramol

1,86511438

I am pre-baking an AMI from which to launch some instances;

The only networking configuration I make, is to add a custom dns as follows:

prepend domain-name-servers 10.3.4.1;

in the ami's /etc/dhcp/dhclient.conf;

Then, in an instance I launch from this ami:

root@ip-10-17-0-114:~# cat /etc/hostname

ip-10-17-0-15

root@ip-10-17-0-114:~# hostname

ip-10-17-0-114

Is this behavior normal?

amazon-web-services amazon-ec2 dns ami

asked Nov 20 at 7:24

pkaramol

1,86511438

asked Nov 20 at 7:24

pkaramol

1,86511438

asked Nov 20 at 7:24

pkaramol

1,86511438

asked Nov 20 at 7:24

pkaramol

1,86511438

asked Nov 20 at 7:24

pkaramol

1,86511438

add a comment |

2 Answers
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In your AMI, file /etc/sysconfig/network ensure hostname is set to the below:
HOSTNAME=localhost.localdomain and NETWORKING=yes

edited Nov 20 at 10:07

answered Nov 20 at 9:51

ben5556

1,602139

this file does not exist at least on debian jessie
– pkaramol
Nov 21 at 11:11

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0
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domain-name-server 10.3.4.1 is not the same as hostname. Would need some more info to actually help. If you area trying to point your EC2 instances DNS server setting to that IP address, you could do that in the DHCP options within a VPC.

what are you trying to achieve here?

answered Nov 20 at 23:29

Michael Quale

105

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2 Answers
2

active

oldest

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2 Answers
2

active

oldest

votes

up vote
1
down vote

In your AMI, file /etc/sysconfig/network ensure hostname is set to the below:
HOSTNAME=localhost.localdomain and NETWORKING=yes

edited Nov 20 at 10:07

answered Nov 20 at 9:51

ben5556

1,602139

this file does not exist at least on debian jessie
– pkaramol
Nov 21 at 11:11

add a comment |

up vote
1
down vote

In your AMI, file /etc/sysconfig/network ensure hostname is set to the below:
HOSTNAME=localhost.localdomain and NETWORKING=yes

edited Nov 20 at 10:07

answered Nov 20 at 9:51

ben5556

1,602139

this file does not exist at least on debian jessie
– pkaramol
Nov 21 at 11:11

add a comment |

up vote
1
down vote

In your AMI, file /etc/sysconfig/network ensure hostname is set to the below:
HOSTNAME=localhost.localdomain and NETWORKING=yes

edited Nov 20 at 10:07

answered Nov 20 at 9:51

ben5556

1,602139

In your AMI, file /etc/sysconfig/network ensure hostname is set to the below:
HOSTNAME=localhost.localdomain and NETWORKING=yes

edited Nov 20 at 10:07

answered Nov 20 at 9:51

ben5556

1,602139

edited Nov 20 at 10:07

answered Nov 20 at 9:51

ben5556

1,602139

answered Nov 20 at 9:51

ben5556

1,602139

answered Nov 20 at 9:51

ben5556

1,602139

this file does not exist at least on debian jessie
– pkaramol
Nov 21 at 11:11

add a comment |

this file does not exist at least on debian jessie
– pkaramol
Nov 21 at 11:11

this file does not exist at least on debian jessie
– pkaramol
Nov 21 at 11:11

add a comment |

up vote
0
down vote

what are you trying to achieve here?

answered Nov 20 at 23:29

Michael Quale

105

add a comment |

up vote
0
down vote

what are you trying to achieve here?

answered Nov 20 at 23:29

Michael Quale

105

add a comment |

up vote
0
down vote

what are you trying to achieve here?

answered Nov 20 at 23:29

Michael Quale

105

what are you trying to achieve here?

answered Nov 20 at 23:29

Michael Quale

105

answered Nov 20 at 23:29

Michael Quale

105

answered Nov 20 at 23:29

Michael Quale

105

answered Nov 20 at 23:29

Michael Quale

105

add a comment |

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