How to install percona-server 5.7 on debian 9?

Question

Debian

Installed vestaCP. I'm trying to install percona according to the instructions https://forum.vestacp.com/viewtopic.php?f=14&t=146...

apt-get install percona-server-server-5.7 percona-server-client-5.7 -y
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 percona-server-client-5.7 : Depends: libreadline6 (>= 6.0) but it is not installable
                             Depends: libssl1.0.0 (>= 1.0.2~beta3) but it is not installable
 percona-server-server-5.7 : Depends: libssl1.0.0 (>= 1.0.2~beta3) but it is not installable
E: Unable to correct problems, you have held broken packages.

Next I try

apt-get install libreadline6
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libreadline6 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'libreadline6' has no installation candidate

If so:

dpkg --list|grep libreadline
ii  libreadline5:amd64                5.2+dfsg-3+b1                  amd64        GNU readline and history libraries, run-time libraries
ii  libreadline7:amd64                7.0-3                          amd64        GNU readline and history libraries, run-time libraries

That

apt-get install libreadline7
Reading package lists... Done
Building dependency tree
Reading state information... Done
libreadline7 is already the newest version (7.0-3).
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.

What to do, how to be?

Answer 1

In general, it is necessary to read the official documentation .