03-04-2015
Roadmap to upgrade from RHEL 5.8 to 6.6
Hello,
We are thinking about upgrading our RHEL platform from 5.8 to 6.6 but we've been advised we need to build new servers from scratch. For us this approach is not feasible as it requires new hardware and our servers are 1-year old.
I was wondering if somebody has done or planned for a similar upgrade and if they are willing to share their roadmap upgrade.
Thanks and good day
Fabio Gil
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relup(5) Files relup(5)
NAME
relup - Release upgrade file
DESCRIPTION
The release upgrade file describes how a release is upgraded in a running system.
This file is automatically generated by systools:make_relup/3,4 , using a release resource file ( .rel ), application resource files ( .app
) and application upgrade files ( .appup ) as input.
FILE SYNTAX
In a target system, the release upgrade file should be located in the OTP_ROOT/erts-EVsn/Vsn directory.
The relup file contains one single Erlang term, which defines the instructions used to upgrade the release. The file has the following syn-
tax:
{Vsn,
[{UpFromVsn, Descr, Instructions}, ...],
[{DownToVsn, Descr, Instructions}, ...]}.
* Vsn = string() is the current version of the release.
* UpFromVsn = string() is an earlier version of the release to upgrade from.
* Descr = term() is a user defined parameter passed from the systools:make_relup/3,4 function. It will be used in the return value of
release_handler:install_release/1,2 .
* Instructions is a list of low-level release upgrade instructions, see appup(5) .
It consists of the release upgrade instructions from the respective application upgrade files (high-level instructions are translated
to low-level instructions), in the same order as in the start script.
* DownToVsn = string() is an earlier version of the release to downgrade to.
When upgrading from UpFromVsn with release_handler:install_release/1,2 , there does not have to be an exact match of versions, but
UpFromVsn can be a sub-string of the current release version.
SEE ALSO
app(5), appup(5), rel(5), release_handler(3erl), systools(3erl)
Ericsson AB sasl 2.1.9.3 relup(5)