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Diffstat (limited to 'debian/README.Maintainer')
| -rw-r--r-- | debian/README.Maintainer | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/debian/README.Maintainer b/debian/README.Maintainer new file mode 100644 index 00000000000..80b484d7a6c --- /dev/null +++ b/debian/README.Maintainer @@ -0,0 +1,99 @@ +########################################################################### +# Here are some information that are only of interest to the Debiani # +# maintainers of MySQL. # +########################################################################### + +# +# Remarks to dependencies +# +libwrap0-dev (>= 7.6-8.3) + According to bug report 114582 where where build problems on + IA-64/sid with at least two prior versions. +psmisc + /usr/bin/killall in the initscript + +zlib1g in libmysqlclient-dev: + "mysql_config --libs" adds "-lz" + +Build-Dep: + +debhelper (>=4.1.16): + See po-debconf(7). + +autoconf (>= 2.13-20), automake1.7 + Try to get rid of them. + +doxygen, tetex-bin, tetex-extra, gs + for ndb/docs/*tex + +mysql-server-5.0: Pre-Depends: mysql-common + This was necessary as mysql-server-5.0.preinst checks for unmodified + conffiles from mysql-server-4.1 and copies 5.0 ones over them to avoid + unnecessary dpkg questions. As mysql-server-5.0 is not unpacked at its + pre-inst stage, it had to copy those files from a package that is + definetly already unpacked which does not have to be the case with Depends. + +# +# Remarks to the start scripts +# + +## initscripts rely on mysqladmin from a different package +We have the problem that "/etc/init.d/mysql stop" relies on mysqladmin which +is in another package (mysql-client) and a passwordless access that's maybe +only available if the user configured his /root/.my.cnf. Can this be a problem? +* normal mode: not because the user is required to have it. Else: +* purge/remove: not, same as normal mode +* upgrade: not, same as normal mode +* first install: not, it depends on mysql-client which at least is unpacked + so mysqladmin is there (to ping). It is not yet configured + passwordles but if there's a server running then there's a + /root/.my.cnf. Anyways, we simply kill anything that's mysqld. + +## Passwordless access for the maintainer scripts +Another issue is that the scripts needs passwordless access. To ensure this +a debian-sys-maint user is configured which has process and shutdown privs. +The file with the randomly (that's important!) generated password must be +present as long as the databases remain installed because else a new install +would have no access. This file should be used like: + mysqladmin --defaults-file=/etc/mysql/debian.cnf restart +to avoid providing the password in plaintext on a commandline where it would +be visible to any user via the "ps" command. + +## When to start the daemon? +We aim to give the admin full control on when MySQL is running. +Issues to be faced here: +OLD: + 1. Debconf asks whether MySQL should be started on boot so update-rc.d is + only run if the answer has been yes. The admin is likely to forget + this decision but update-rc.d checks for an existing line in + /etc/runlevel.conf and leaves it intact. + 2. On initial install, if the answer is yes, the daemon has to be started. + 3. On upgrades it should only be started if it was already running, everything + else is confusing. Especiall relying on an debconf decision made month ago + is considered suboptimal. See bug #274264 + Implementation so far: + prerm (called on upgrade before stopping the server): + check for a running server and set flag if necessary + preinst (called on initial install and before unpacking when upgrading): + check for the debconf variable and set flag if necessary + postinst (called on initial install and after each upgrade after unpacking): + call update-rc.d if debconf says yes + call invoce-rc.d if the flag has been set + Problems remaining: + dpkg-reconfigure and setting mysql start on boot to yes did not start mysql + (ok "start on boot" literally does not mean "start now" so that might have been ok) +NEW: + 1. --- no debconf anymore for the sake of simplicity. We have runlevel.conf, + the admin should use it + 2. On initial install the server is started. + 3. On upgrades the server is started exactly if it was running before so the + runlevel configuration is irrelevant. It will be preserved by the mean of + update-rc.d's builtin check. + Implementation: + prerm (called on upgrade before stopping the server): + check for a running server and set flag if necessary + preinst (called on initial install and before unpacking when upgrading): + check for $1 beeing (initial) "install" and set flag + postinst (called on initial install and after each upgrade after unpacking): + call update-rc.d + call invoce-rc.d if the flag has been set |