> Multiple versions of the same package (deb/rpm) can not be installed at the
same time.
I dn't think, we'll required to install multiple versions same time. Even this
can be handled.
Could you elaborate the reason why we need the *-select if so?
IMO, as components rpm's are build with bigtop, having it in bigtop will be
perfect choice. As we need to change the spec's.
It does not make sense.
While Hadoop rpm/deb are built with Bigtop, Hadoop is independent project.
The following description implies that the *-select is updated along with Ambari
and Ambari is the perfect place to host it.
| These scripts are a basic necessity in the Ambari framework for the
| installation of various Bigdata packages. The only major changes they would
| receive is when we onboard new services and components to Ambari, else they
| usually do not receive updates. In the past, we used to get hdp-select rpm
| downloaded and installed from HDP repositories.
On 2022/07/04 19:35, Battula, Brahma Reddy wrote:
Multiple versions of the same package (deb/rpm) can not be installed at the
same time.
I dn't think, we'll required to install multiple versions same time. Even this
can be handled.
Anyway Bigtop will be used to create the RPM's not for deploying the cluster
with ambari now.
I feel hdp-select/bdp-select should belongs to Ambari
since it is assuming the convention specific to HDP/BDP/Ambari.
> We can easily add packaging for the code under Ambari
> (as ambari-bdp-select for example) based on the existing stuff under
> bigtop-packages/*/ambari.
IMO, as components rpm's are build with bigtop, having it in bigtop will be
perfect choice. As we need to change the spec's.
On 03/07/22, 9:56 AM, "Masatake Iwasaki" <[email protected]> wrote:
> For example, assuming that the following stack is installed:
>
> /usr/hdp/SOME_VERSION/hadoop/...
> /spark/...
> /zookeeper/...
Multiple versions of the same package (deb/rpm) can not be installed at
the same time.
IIRC, HDP uses convention in which the product version is part of package
name
for addressing this. like::
$ rpm -qi hadoop_2_6_1_0_129
Name : hadoop_2_6_1_0_129
Version : 2.7.3.2.6.1.0
...
> So if we accept bdp-select, we also have to develop a new feature to
> change install directories of the packages,
> keeping the current default for avoiding user-facing incompatibility.
> Otherwise bdp-select itself is useless.
I don't like to bring the awkward package name convention to Bigtop
at least by default.
I feel hdp-select/bdp-select should belongs to Ambari
since it is assuming the convention specific to HDP/BDP/Ambari.
We can easily add packaging for the code under Ambari
(as ambari-bdp-select for example) based on the existing stuff under
bigtop-packages/*/ambari.
Masatake Iwasaki
On 2022/07/03 7:17, Kengo Seki wrote:
> Thank you for proposing this, Viraj and Brahma.
> This proposal may feel sudden to someone, so let me explain some context,
> mainly to the Bigtop community.
>
> Ambari went to Attic once due to inactivity,
> but some of its users and developers are reviving it now.
> From the Bigtop community, Roman and Evans undertook the role of
> initial PMC members,
> and Jun, Yuqi, Ganesh, Masatake, and I are also going to support it.
>
> The default stack of Ambari was HDP, but it has gone behind paywall,
> so we have to add an alternative stack in the next release of Ambari.
> Viraj and Brahma are planning to leverage Bigtop packages for that
purpose,
> and that stack is tentatively named BDP (BigData Platform).
>
> We would also like to take over a feature called hdp-select,
> which enables users to switch the current stack easily with symlink.
> For example, assuming that the following stack is installed:
>
> /usr/hdp/SOME_VERSION/hadoop/...
> /spark/...
> /zookeeper/...
>
> /etc/hadoop, /var/lib/hadoop, /usr/lib/hadoop are symlinks of
> /usr/hdp/SOME_VERSION/hadoop/etc, /usr/hdp/SOME_VERSION/hadoop/var/lib,
> /usr/hdp/SOME_VERSION/hadoop/usr/lib respectively.
>
> Then the new stack is installed under /usr/hdp/NEW_VERSION,
> users can run hdp-select to switch the symlinks to the new directories
> for upgrading the stack.
> (Is my understanding correct? Correct me if I'm wrong, Viraj and Brahma)
>
> hdp-select was provided as a RPM/DEB package just like other packages
> HDP provided,
> so it is user-friendly to provide bdp-select (the BDP version of
> hdp-select) as well.
> This is the background of Viraj's proposal.
>
> But there is a problem here to leverage Bigtop packages in this manner.
> Bigtop respects Linux's Filesystem Hierarchy Standard,
> so it doesn't install files into a single place (/usr/hdp/VERSION in
> the example above),
> but directly into /etc, /usr, /var and so on.
> So if we accept bdp-select, we also have to develop a new feature to
> change install directories of the packages,
> keeping the current default for avoiding user-facing incompatibility.
> Otherwise bdp-select itself is useless.
> But it will be a tough work, because installation paths are hard-coded
> in the RPM specs and DEB packaging scripts now.
>
> Based on the above, how about creating a new branch for adding hdp-select
> and developing the feature to switch installation paths?
> After finishing the work on that branch and ensuring that it works
expectedly,
> we can merge it into master, I think.
>
> Kengo Seki <[email protected]>
>
> On Thu, Jun 30, 2022 at 4:21 PM Battula, Brahma Reddy
> <[email protected]> wrote:
>>
>> Thanks @Viraj Jasani to start discussing on this.
>>
>> IMO, For upcoming ambari release(2.7.7) , we should have select other
than HDP so that people can start using the ambari without HDP.
>>
>> I am +1(non-binding) on this approach to have selects in bigtop code.
May be for long term , we can think for tarballs or mpacks which can go in mabari
trunk.
>>
>>
>> On 29/06/22, 10:22 AM, "Viraj Jasani" <[email protected]> wrote:
>>
>> Hi Ambari/Bigtop dev,
>>
>> As per the new roadmap of Apache Ambari, we would like to propose
moving
>> certain scripts (previously known as hdp-select and conf-select)
to Bigtop
>> so that their rpm installation could be managed independently.
>> These scripts are a basic necessity in the Ambari framework for the
>> installation of various Bigdata packages. The only major changes
they would
>> receive is when we onboard new services and components to Ambari,
else they
>> usually do not receive updates. In the past, we used to get
hdp-select rpm
>> downloaded and installed from HDP repositories.
>>
>> We have still not officially finalized the new replacement name for
>> hdp-select, it would likely be bdp-select (bdp: BigData Platform).
However,
>> the purpose of bdp-select and conf-select remains the same.
>>
