How to force AMI to use custom DNS server while using cloud-init












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I have an account on AWS where I do not have control over the DNS server that our VPC uses. I do, however, need to have a DNS server that my aws servers can rely on to resolve domain and hostnames. I have a server that is running IPA on RHEL, but I can't seem to get my servers to point to that DNS server.



I also have scripts that need to run on initial startup that will be somewhat unique every time I generate a grouping of servers, so I need cloud-init installed.



Is there a way to either configure DNS on the RHEL machines after they have come online, or setup cloud-init to utilize a custom nameserver?



I looked into writing custom cfg files for my ami, but the change seems to keep getting overridden.



What I would like is to be able to make use of cloud-init to allow my user scripts to run and for it to setup the default DNS, but also to add a secondary DNS that points to my internal DNS server.










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    I have an account on AWS where I do not have control over the DNS server that our VPC uses. I do, however, need to have a DNS server that my aws servers can rely on to resolve domain and hostnames. I have a server that is running IPA on RHEL, but I can't seem to get my servers to point to that DNS server.



    I also have scripts that need to run on initial startup that will be somewhat unique every time I generate a grouping of servers, so I need cloud-init installed.



    Is there a way to either configure DNS on the RHEL machines after they have come online, or setup cloud-init to utilize a custom nameserver?



    I looked into writing custom cfg files for my ami, but the change seems to keep getting overridden.



    What I would like is to be able to make use of cloud-init to allow my user scripts to run and for it to setup the default DNS, but also to add a secondary DNS that points to my internal DNS server.










    share|improve this question

























      0












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      0







      I have an account on AWS where I do not have control over the DNS server that our VPC uses. I do, however, need to have a DNS server that my aws servers can rely on to resolve domain and hostnames. I have a server that is running IPA on RHEL, but I can't seem to get my servers to point to that DNS server.



      I also have scripts that need to run on initial startup that will be somewhat unique every time I generate a grouping of servers, so I need cloud-init installed.



      Is there a way to either configure DNS on the RHEL machines after they have come online, or setup cloud-init to utilize a custom nameserver?



      I looked into writing custom cfg files for my ami, but the change seems to keep getting overridden.



      What I would like is to be able to make use of cloud-init to allow my user scripts to run and for it to setup the default DNS, but also to add a secondary DNS that points to my internal DNS server.










      share|improve this question













      I have an account on AWS where I do not have control over the DNS server that our VPC uses. I do, however, need to have a DNS server that my aws servers can rely on to resolve domain and hostnames. I have a server that is running IPA on RHEL, but I can't seem to get my servers to point to that DNS server.



      I also have scripts that need to run on initial startup that will be somewhat unique every time I generate a grouping of servers, so I need cloud-init installed.



      Is there a way to either configure DNS on the RHEL machines after they have come online, or setup cloud-init to utilize a custom nameserver?



      I looked into writing custom cfg files for my ami, but the change seems to keep getting overridden.



      What I would like is to be able to make use of cloud-init to allow my user scripts to run and for it to setup the default DNS, but also to add a secondary DNS that points to my internal DNS server.







      amazon-web-services dns cloud-init






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      share|improve this question











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      share|improve this question










      asked Nov 21 '18 at 17:20









      CraigR8806

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