Package: dovecot-core Version: 1:2.2.18-2+b1 Severity: normal Dear Maintainer,
dovecot-core currently ships and enables (via dh_systemd_enable) two units: dovecot.socket and dovecot.service. However, enabling dovecot.socket by default is a bit problematic in this case, for the following reasons: - dovecot.socket makes assumptions about the listening sockets; it assumes an IMAP-only setup with dovecot listening on TCP ports 143 and 993, which may or may not be the case. Note that this is done even if dovecot-imapd is not installed in the system. - invoke-rc.d, as used in the maintainer scripts, does not handle socket units at all. This may cause unpredictable behavior during package upgrades on busy servers, since dovecot.service is stopped in prerm, but may be (re-)started anytime before the new packages have been (fully) unpacked if it is triggered by the socket unit. - dh_systemd_start also does not start the socket unit by default, while the socket unit will be started on the next boot, differentiating boot-time and installation-time behavior. - dovecot.service is enabled and started anyway during boot, so using socket activation for dovecot in this case seems to be redundant. IMHO, it is okay for dovecot.socket to be shipped with the package, but it should not be enabled by default. Instead it should be left inactive and up to the admin to decide whether to explicitly enable it or not. Regards, Apollon -- Package-specific info: -- System Information: Debian Release: stretch/sid APT prefers testing APT policy: (500, 'testing'), (500, 'stable'), (90, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386, mips Kernel: Linux 4.3.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=el_GR.UTF-8, LC_CTYPE=el_GR.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages dovecot-core depends on: ii adduser 3.113+nmu3 ii init-system-helpers 1.24 ii libbz2-1.0 1.0.6-8 ii libc6 2.21-8 ii libexttextcat-2.0-0 3.4.4-1 ii liblzma5 5.1.1alpha+20120614-2.1 ii libpam-runtime 1.1.8-3.2 ii libpam0g 1.1.8-3.2 ii libssl1.0.2 1.0.2f-2 ii libstemmer0d 0+svn585-1 ii libwrap0 7.6.q-25 ii openssl 1.0.2f-2 ii ucf 3.0033 ii zlib1g 1:1.2.8.dfsg-2+b1 dovecot-core recommends no packages. Versions of packages dovecot-core suggests: pn dovecot-gssapi <none> pn dovecot-imapd <none> pn dovecot-ldap <none> pn dovecot-lmtpd <none> pn dovecot-lucene <none> pn dovecot-managesieved <none> pn dovecot-mysql <none> pn dovecot-pgsql <none> pn dovecot-pop3d <none> pn dovecot-sieve <none> pn dovecot-solr <none> pn dovecot-sqlite <none> pn ntp <none> Versions of packages dovecot-core is related to: ii dovecot-core [dovecot-common] 1:2.2.18-2+b1 pn dovecot-dbg <none> pn dovecot-dev <none> pn dovecot-gssapi <none> pn dovecot-imapd <none> pn dovecot-ldap <none> pn dovecot-lmtpd <none> pn dovecot-managesieved <none> pn dovecot-mysql <none> pn dovecot-pgsql <none> pn dovecot-pop3d <none> pn dovecot-sieve <none> pn dovecot-sqlite <none> -- debconf-show failed
