253 lines
9.4 KiB
Bash
253 lines
9.4 KiB
Bash
#!/bin/bash
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# -e :: exit on error (do this in functions as well)
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# -E :: inherit the ERR trap to functions, command substitutions and sub-shells
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# -u :: show (and exit) when using unset variables
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# -o pipefail :: exit on error in pipes
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set -eE -u -o pipefail
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VERSION_CODENAME='bookworm'
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# shellcheck source=../helpers/log.sh
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source /usr/local/bin/helpers/log.sh
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_log_level_is 'trace' && QUIET='-y' || QUIET='-qq'
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function _pre_installation_steps() {
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_log 'info' 'Starting package installation'
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_log 'debug' 'Running pre-installation steps'
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_log 'trace' 'Updating package signatures'
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apt-get "${QUIET}" update
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_log 'trace' 'Upgrading packages'
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apt-get "${QUIET}" upgrade
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_log 'trace' 'Installing packages that are needed early'
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# Add packages usually required by apt to:
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local EARLY_PACKAGES=(
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# Avoid logging unnecessary warnings:
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apt-utils
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# Required for adding third-party repos (/etc/apt/sources.list.d) as alternative package sources (eg: Dovecot CE and Rspamd):
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apt-transport-https ca-certificates curl gnupg
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# Avoid problems with SA / Amavis (https://github.com/docker-mailserver/docker-mailserver/pull/3403#pullrequestreview-1596689953):
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systemd-standalone-sysusers
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)
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apt-get "${QUIET}" install --no-install-recommends "${EARLY_PACKAGES[@]}" 2>/dev/null
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}
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function _install_utils() {
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_log 'debug' 'Installing utils sourced from Github'
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_log 'trace' 'Installing jaq'
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local JAQ_TAG='v2.1.0'
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curl -sSfL "https://github.com/01mf02/jaq/releases/download/${JAQ_TAG}/jaq-$(uname -m)-unknown-linux-gnu" -o /usr/bin/jaq
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chmod +x /usr/bin/jaq
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_log 'trace' 'Installing swaks'
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apt-get "${QUIET}" install --no-install-recommends perl-doc
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local SWAKS_VERSION='20240103.0'
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local SWAKS_RELEASE="swaks-${SWAKS_VERSION}"
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curl -sSfL "https://github.com/jetmore/swaks/releases/download/v${SWAKS_VERSION}/${SWAKS_RELEASE}.tar.gz" | tar -xz
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mv "${SWAKS_RELEASE}/swaks" /usr/local/bin
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rm -r "${SWAKS_RELEASE}"
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}
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function _install_postfix() {
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_log 'debug' 'Installing Postfix'
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_log 'warn' 'Applying workaround for Postfix bug (see https://github.com/docker-mailserver/docker-mailserver/issues/2023#issuecomment-855326403)'
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# Debians postfix package has a post-install script that expects a valid FQDN hostname to work:
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mv /bin/hostname /bin/hostname.bak
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echo "echo 'docker-mailserver.invalid'" >/bin/hostname
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chmod +x /bin/hostname
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apt-get "${QUIET}" install --no-install-recommends postfix
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mv /bin/hostname.bak /bin/hostname
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# Irrelevant - Debian's default `chroot` jail config for Postfix needed a separate syslog socket:
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rm /etc/rsyslog.d/postfix.conf
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}
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function _install_packages() {
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_log 'debug' 'Installing all packages now'
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local ANTI_VIRUS_SPAM_PACKAGES=(
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clamav clamav-daemon
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# spamassassin is used only with amavisd-new, while pyzor + razor are used by spamassasin
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amavisd-new spamassassin pyzor razor
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)
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# predominantly for Amavis support
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local CODECS_PACKAGES=(
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altermime arj bzip2
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cabextract cpio file
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gzip lhasa liblz4-tool
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lrzip lzop nomarch
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p7zip-full pax rpm2cpio
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unrar-free unzip xz-utils
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)
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local MISCELLANEOUS_PACKAGES=(
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binutils bsd-mailx
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dbconfig-no-thanks dumb-init iproute2
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libdate-manip-perl libldap-common libmail-spf-perl libnet-dns-perl
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locales logwatch netcat-openbsd
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nftables # primarily for Fail2Ban
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rsyslog supervisor
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uuid # used for file-locking
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whois
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)
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local POSTFIX_PACKAGES=(
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pflogsumm postgrey postfix-ldap postfix-mta-sts-resolver
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postfix-pcre postfix-policyd-spf-python postsrsd
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)
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local MAIL_PROGRAMS_PACKAGES=(
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opendkim opendkim-tools
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opendmarc libsasl2-modules sasl2-bin
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)
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# These packages support community contributed features.
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# If they cause too much maintenance burden in future, they are liable for removal.
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local COMMUNITY_PACKAGES=(
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fetchmail getmail6
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)
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# `bind9-dnsutils` provides the `dig` command
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# `iputils-ping` provides the `ping` command
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DEBUG_PACKAGES=(
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bind9-dnsutils iputils-ping less nano
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)
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apt-get "${QUIET}" install --no-install-recommends \
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"${ANTI_VIRUS_SPAM_PACKAGES[@]}" \
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"${CODECS_PACKAGES[@]}" \
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"${MISCELLANEOUS_PACKAGES[@]}" \
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"${POSTFIX_PACKAGES[@]}" \
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"${MAIL_PROGRAMS_PACKAGES[@]}" \
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"${DEBUG_PACKAGES[@]}" \
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"${COMMUNITY_PACKAGES[@]}"
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}
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function _install_dovecot() {
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local DOVECOT_PACKAGES=(
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dovecot-core dovecot-imapd
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dovecot-ldap dovecot-lmtpd dovecot-managesieved
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dovecot-pop3d dovecot-sieve
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)
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# Additional Dovecot packages for supporting the DMS community (docs-only guide contributions).
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DOVECOT_PACKAGES+=(dovecot-auth-lua)
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# (Opt-in via ENV) Change repo source for dovecot packages to a third-party repo maintained by Dovecot.
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# NOTE: AMD64 / x86_64 is the only supported arch from the Dovecot CE repo (thus noDMS built for ARM64 / aarch64)
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# Repo: https://repo.dovecot.org/ce-2.4-latest/debian/bookworm/dists/bookworm/main/
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# Docs: https://repo.dovecot.org/#debian
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if [[ ${DOVECOT_COMMUNITY_REPO} -eq 1 ]] && [[ "$(uname --machine)" == "x86_64" ]]; then
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# WARNING: Repo only provides Debian Bookworm package support for Dovecot CE 2.4+.
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# As Debian Bookworm only packages Dovecot 2.3.x, building DMS with this alternative package repo may not yet be compatible with DMS:
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# - 2.3.19: https://salsa.debian.org/debian/dovecot/-/tree/stable/bookworm
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# - 2.3.21: https://salsa.debian.org/debian/dovecot/-/tree/stable/bookworm-backports
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_log 'trace' 'Adding third-party package repository (Dovecot)'
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curl -fsSL https://repo.dovecot.org/DOVECOT-REPO-GPG-2.4 | gpg --dearmor > /usr/share/keyrings/upstream-dovecot.gpg
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echo \
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"deb [signed-by=/usr/share/keyrings/upstream-dovecot.gpg] https://repo.dovecot.org/ce-2.4-latest/debian/${VERSION_CODENAME} ${VERSION_CODENAME} main" \
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> /etc/apt/sources.list.d/upstream-dovecot.list
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# Refresh package index:
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apt-get "${QUIET}" update
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# This repo instead provides `dovecot-auth-lua` as a transitional package to `dovecot-lua`,
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# thus this extra package is required to retain lua support:
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DOVECOT_PACKAGES+=(dovecot-lua)
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fi
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_log 'debug' 'Installing Dovecot'
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apt-get "${QUIET}" install --no-install-recommends "${DOVECOT_PACKAGES[@]}"
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# Runtime dependency for fts_xapian (built via `compile.sh`):
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apt-get "${QUIET}" install --no-install-recommends libxapian30
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}
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function _install_rspamd() {
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# NOTE: DMS only supports the rspamd package via using the third-party repo maintained by Rspamd (AMD64 + ARM64):
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# Repo: https://rspamd.com/apt-stable/dists/bookworm/main/
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# Docs: https://rspamd.com/downloads.html#debian-and-ubuntu-linux
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# NOTE: Debian 12 provides Rspamd 3.4 (too old) and Rspamd discourages it's use
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_log 'trace' 'Adding third-party package repository (Rspamd)'
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curl -fsSL https://rspamd.com/apt-stable/gpg.key | gpg --dearmor > /usr/share/keyrings/upstream-rspamd.gpg
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echo \
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"deb [signed-by=/usr/share/keyrings/upstream-rspamd.gpg] https://rspamd.com/apt-stable/ ${VERSION_CODENAME} main" \
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> /etc/apt/sources.list.d/upstream-rspamd.list
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# Refresh package index:
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apt-get "${QUIET}" update
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_log 'debug' 'Installing Rspamd'
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apt-get "${QUIET}" install rspamd redis-server
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}
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function _install_fail2ban() {
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local FAIL2BAN_VERSION=1.1.0
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local FAIL2BAN_DEB_URL="https://github.com/fail2ban/fail2ban/releases/download/${FAIL2BAN_VERSION}/fail2ban_${FAIL2BAN_VERSION}-1.upstream1_all.deb"
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local FAIL2BAN_DEB_ASC_URL="${FAIL2BAN_DEB_URL}.asc"
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local FAIL2BAN_GPG_FINGERPRINT='8738 559E 26F6 71DF 9E2C 6D9E 683B F1BE BD0A 882C'
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local FAIL2BAN_GPG_PUBLIC_KEY_ID='0x683BF1BEBD0A882C'
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local FAIL2BAN_GPG_PUBLIC_KEY_SERVER='hkps://keyserver.ubuntu.com'
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_log 'debug' 'Installing Fail2ban'
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# Dependencies (https://github.com/docker-mailserver/docker-mailserver/pull/3403#discussion_r1306581431)
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apt-get "${QUIET}" install --no-install-recommends python3-pyinotify python3-dnspython python3-systemd
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gpg --keyserver "${FAIL2BAN_GPG_PUBLIC_KEY_SERVER}" --recv-keys "${FAIL2BAN_GPG_PUBLIC_KEY_ID}" 2>&1
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curl -fsSLo fail2ban.deb "${FAIL2BAN_DEB_URL}"
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curl -fsSLo fail2ban.deb.asc "${FAIL2BAN_DEB_ASC_URL}"
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FINGERPRINT=$(LANG=C gpg --verify fail2ban.deb.asc fail2ban.deb |& sed -n 's#Primary key fingerprint: \(.*\)#\1#p')
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if [[ -z ${FINGERPRINT} ]]; then
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echo 'ERROR: Invalid GPG signature!' >&2
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exit 1
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fi
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if [[ ${FINGERPRINT} != "${FAIL2BAN_GPG_FINGERPRINT}" ]]; then
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echo "ERROR: Wrong GPG fingerprint!" >&2
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exit 1
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fi
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dpkg -i fail2ban.deb 2>&1
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rm fail2ban.deb fail2ban.deb.asc
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_log 'debug' 'Patching Fail2ban to enable network bans'
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# Enable network bans
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# https://github.com/docker-mailserver/docker-mailserver/issues/2669
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# https://github.com/fail2ban/fail2ban/issues/3125
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sedfile -i -r 's/^_nft_add_set = .+/_nft_add_set = <nftables> add set <table_family> <table> <addr_set> \\{ type <addr_type>\\; flags interval\\; \\}/' /etc/fail2ban/action.d/nftables.conf
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}
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function _post_installation_steps() {
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_log 'debug' 'Running post-installation steps (cleanup)'
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_log 'debug' 'Deleting sensitive files (secrets)'
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rm /etc/postsrsd.secret
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_log 'debug' 'Deleting default logwatch cronjob'
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rm /etc/cron.daily/00logwatch
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_log 'trace' 'Removing leftovers from APT'
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apt-get "${QUIET}" clean
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rm -rf /var/lib/apt/lists/*
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}
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_pre_installation_steps
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_install_utils
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_install_postfix
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_install_packages
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_install_dovecot
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_install_rspamd
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_install_fail2ban
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_post_installation_steps
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