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From Martin Gainty <mgai...@hotmail.com>
Subject Re: Is it possible to use the server address as the host address?
Date Fri, 12 Jan 2018 16:05:07 GMT
MG>what abe has suggested is a vendor-specific solution with a hefty pricetag

MG>if you're closer to "low-budget solution" (AKA free) look at implementing BIND:

BIND Open Source DNS Server | Internet Systems Consortium<https://www.isc.org/downloads/bind/>
BIND is open source software that enables you to publish your Domain Name System (DNS) information
on the Internet, and to resolve DNS queries for your users.

MG>if your platform is Windows then read how to implement BIND for Windows


MG>if your willing to go with a Microsoft specific solution then Microsoft DNS Server is
your solution (again vendor specific)
DNS - technet.microsoft.com<https://technet.microsoft.com/en-us/library/cc730921(v=ws.11).aspx>
Domain Name System (DNS) is the name resolution protocol for TCP/IP networks, such as the
Internet. A DNS server hosts the information that enables client computers ...


From: Shafique Jamal <shafique.jamal@gmail.com>
Sent: Monday, January 8, 2018 7:37 PM
To: user@zookeeper.apache.org
Subject: Re: Is it possible to use the server address as the host address?

Thanks Abe. In case it is helpful for some: those using AWS EC2 VM
instances with an Elastic IP address (i.e. a static IP address) can ask
Amazon to resolve a reverse DNS lookup on the Elastic IP address to one DNS
address that they have set to resolve to that IP address. They can do so by
filling out a form available at this link:


Configurable Reverse DNS for Amazon EC2’s Elastic IP ...<https://aws.amazon.com/blogs/aws/reverse-dns-for-ec2s-elastic-ip-addresses/>
Get Started Start developing on Amazon Web Services using one of our pre-built sample apps.

The actual form is available here:


Amazon Web Services Sign-In<https://aws-portal.amazon.com/gp/aws/html-forms-controller/contactus/ec2-email-limit-rdns-request>
Amazon Web Services uses information from your Amazon.com account to identify you and allow
access to Amazon Web Services. Your use of this site is governed by our ...

Google Cloud has something similar - you can request a PTR record. With
Google Cloud you get the reverse DNS done quicker - AWS could take several
hours or a day to get it done. This link has more information:

Creating a PTR Record for a VM Instance | Compute Engine ...<https://cloud.google.com/compute/docs/instances/create-ptr-record>
This is a Beta release of PTR support for Google Compute Engine. This feature is not covered
by any SLA or deprecation policy and may be subject to ...

This can solve the issue of using SASL with ZooKeeper with server names.

On Mon, Jan 8, 2018 at 7:00 PM, Abraham Fine <afine@apache.org> wrote:

> Hello Shafique-
> I believe this discussion on the mailing list from a month ago goes over
> the same issue: https://mail-archives.apache.org/mod_mbox/zookeeper-user/
> 201711.mbox/%3cCABinuxd3bNjYW2p=6t4ztmGzk7U5yiDu7otZv05FKcyK1c
> 6aPg@mail.gmail.com%3e
> The issue has been fixed in 3.5 and there are some issues that need to be
> taken into account regarding backwards compatibility if we are to fix this
> on the 3.4 line.
> Thanks,
> Abe
> On Tue, Dec 26, 2017, at 05:19, Shafique Jamal wrote:
> > Hello,
> >
> > I have documented my issue here:
> > https://stackoverflow.com/a/47956320/2251463

Zookeeper/SASL Checksum failed<https://stackoverflow.com/a/47956320/2251463>
How do I fix the problem that generates this error: WARN [NIOServerCxn.Factory:]
- Client failed to SASL authenticate: javax.security.sasl.SaslException: ...

> >
> > When I use the ZooKeeper client to connect to a server, it takes the
> server
> > address from the "-server" command line argument, looks up the IP
> address,
> > and then tried to find the host name based on that IP address.
> >
> > If you're using an Amazon EC2 instance, then instead of getting something
> > like mysookeeperhost.mydomain.com for the host name, instead something
> like
> > ec2-35-169-37-216.compute-1.amazonaws.com will be returned.
> >
> > Is there an option to use the server address from the command line as the
> > host name?
> >
> > Thanks,

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