Upgrading to 3.12 — Cyrus IMAP 3.12.3 documentation

# Upgrading to 3.12

Note

This guide assumes that you are familiar and comfortable with administration of a Cyrus installation, and system administration in general.

It assumes you are installing from source or tarball. If you want to install from package, use the upgrade instructions from the package provider.

## 1. Preparation

Things to consider before you begin:

### Versions to upgrade from

Before upgrading to 3.12, your deployment should be running 3.10.1 (or later)

If your existing deployment is older than this, you should first upgrade to 3.10.1, let it run for a while, resolve any issues that come up, and only then upgrade to 3.12.

### Installation from tarball

You will need to install from our packaged tarball. We provide a full list of libraries that Debian requires, but we aren't able to test all platforms: you may find you need to install additional or different libraries to support 3.12.

### JMAP/CalDAV changes

#### New JMAP Email/query filter conditions

3.12 adds the JMAP Email/query filter conditions `messageId`, `references`, and `inReplyTo`.

It is recommended to rebuild the Xapian index with squatter(8) to make use of these filter conditions. Otherwise, email queries having these filters fall back to reading the MIME headers from disk, resulting in slower search.

### PCRE2 support

Cyrus 3.12 will prefer PCRE2 over PCRE if both are installed. If you have both installed and wish to use PCRE rather than PCRE2, run configure with `--disable-pcre2`.

If you haven't specifically installed libpcre2-dev (or whatever your system's equivalent is), you might still have parts of pcre2 installed due to other packages on your system depending on it. This can confuse configure into thinking you have a usable PCRE2 when you don't. Either properly install libpcre2-dev so Cyrus can use it, or configure Cyrus with `--disable-pcre2` so that it ignores the partial installation.

Please note that on Debian-based systems, PCRE (the old one, no longer maintained) is called "pcre3". Yes, this is confusing.

### How are you planning on upgrading?

Ideally, you will do a sandboxed test installation of 3.12 using a snapshot of your existing data before you switch off your existing installation.

Other possibilities are upgrading by replication, or upgrading in place.

The rest of the instructions are written assuming a sandboxed 3.12 installation, but you should read and understand them regardless of how you intend to perform the upgrade.

#### Upgrade by replicating

If you're familiar with replication, and your current installation is 2.4 or newer, you can set up your existing installation to replicate data to a new 3.12 installation and failover to the new installation when you're ready. The replication protocol has been kept mostly backwards compatible.

If your old installation contains mailboxes or messages that are older than 2.4, they may not have GUID fields in their indexes (index version too old), or they may have their GUID field set to zero. 3.12 will not accept message replications without valid matching GUIDs, so you need to fix this on your old installation first.

You can check for affected mailboxes by examining the output from the mbexamine(8) tool:

- mailboxes that report a 'Minor Version:' less than 10 will need to have their index upgraded using reconstruct(8) with the -V <version> parameter to be at least 10.

- mailboxes containing messages that report 'GUID:0' will need to have their GUIDs recalculated using reconstruct(8) with the -G parameter.

If you have a large amount of data, these reconstructs will take a long time, so it's better to identify the mailboxes needing attention and target them specifically. But if you have a small amount of data, it might be less work to just reconstruct -G -V max everything.

If your old installation is on 3.0 or older and is using mailbox annotations, you will have problems replicating to newer versions due to missing MODSEQ (Issue #4967). There is an experimental patch in the comments on this issue that might help for a one-off replication run into an empty replica, but it will not help for updating a replica that already has data.

#### Upgrade in place

If you are upgrading in place, you will need to shut down Cyrus entirely while you install the new package. You should probably also block logins or filewall off internet access until you're completely finished so that you aren't surprised by users reconnecting before the upgraded server is ready for them.

### Do What As Who?

Since the various files, databases, directories, etc. used by Cyrus must be readable and writable as the `cyrus` user, please make sure to always perform Cyrus commands as the `cyrus` user, and not as `root`. In our documentation, we will always reference Cyrus commands in this form -- cyr_info(8) -- before using examples of them, so you'll know that those commands must be run as the `cyrus` user.

Doing so in most systems is as simple as using either the `su` or `sudo` commands, like so:

    su cyrus -c "/usr/local/bin/cyr_info conf-lint -C /etc/imapd.conf -M /etc/cyrus.conf"
    sudo -u cyrus /usr/local/bin/cyr_info conf-lint -C /etc/imapd.conf -M /etc/cyrus.conf

In this document, however, there are also several command examples which should or must be run as `root`. These are always standard *nix commands, such as `rsync` or `scp`.

We strongly recommend that you read this entire document before upgrading.

## 2. Install new 3.12 Cyrus

Download the release 3.12 package tarball.

Fetch the libraries for your platform. The full list (including all optional packages) for Debian is:

    sudo apt-get install -y autoconf automake autotools-dev bash-completion \
    bison build-essential comerr-dev debhelper flex g++ git gperf groff \
    heimdal-dev libbsd-resource-perl libclone-perl libconfig-inifiles-perl \
    libcunit1-dev libdatetime-perl libdigest-sha-perl libencode-imaputf7-perl \
    libfile-chdir-perl libglib2.0-dev libical-dev libio-socket-inet6-perl \
    libio-stringy-perl libjansson-dev libldap2-dev libmysqlclient-dev \
    libnet-server-perl libnews-nntpclient-perl libpam0g-dev libpcre2-dev \
    libsasl2-dev libsqlite3-dev libssl-dev libtest-unit-perl libtool \
    libunix-syslog-perl liburi-perl libxapian-dev libxml-generator-perl \
    libxml-xpath-perl libxml2-dev libwrap0-dev libzephyr-dev lsb-base \
    net-tools perl php-cli php-curl pkg-config po-debconf tcl-dev transfig \
    uuid-dev vim wamerican wget xutils-dev zlib1g-dev sasl2-bin rsyslog sudo \
    acl telnet

If you're on another platform and can provide the list of dependencies, please let us know via a GitHub issue or documentation pull request, or send mail to the developer list.

Follow the general install instructions.

Note

It's best to ensure your new Cyrus will not start up automatically if your server restarts in the middle of the upgrade.

How this is best achieved will depend upon your OS and distro, but may involve something like `systemctl disable cyrus-imapd` or `update-rc.d cyrus-imapd disable`

## 3. Shut down existing Cyrus

Shut down your existing Cyrus installation with its init script or whatever method you normally use.

This is necessary to guarantee a clean data snapshot.

## 4. Backup and Copy existing data

We recommend backing up all your data before continuing.

- Sieve scripts

- Config files

- Mail spool

- Cyrus Databases

Copy all of this to the new instance, using `rsync` or similar tools.

Note

Cyrus keeps its data and databases in various locations, some of which may be tailored by your configuration. Please consult File & Directory Locations for guidance on where data lives in your current installation.

For example, to copy from an existing Debian or Ubuntu installation using their standard locations, you might execute this series of commands on the new server (where "oldimap" is the name of the old server):

    rsync -aHv oldimap:/var/lib/cyrus/. /var/lib/cyrus/.
    rsync -aHv oldimap:/var/spool/cyrus/. /var/spool/cyrus/.

You don't need to copy the following databases as Cyrus 3.12 will recreate these for you automatically:

- duplicate delivery (deliver.db),

- TLS cache (tls_sessions.db),

- PTS cache (ptscache.db),

- STATUS cache (statuscache.db).

Note

You may wish to consider relocating these four databases to ephemeral storage, such as `/run/cyrus` (Debian/Ubuntu) or `/var/run/cyrus` or whatever suitable tmpfs is provided on your distro. It will place less IO load on your disks and run faster.

## 5. Copy config files and update

Again, check the locations on your specific installation. For example, on FreeBSD systems, the configuration files imapd.conf(5) and cyrus.conf(5) are in `/usr/local/etc`, rather than `/etc/`. Run this command on the old server:

    scp /etc/cyrus.conf /etc/imapd.conf newimap:/etc/

Using the cyr_info(8) command, check to see if your imapd.conf file contains any deprecated options. Run this command on the new server:

    cyr_info conf-lint -C <path to imapd.conf> -M <path to cyrus.conf>

You need to provide both imapd.conf and cyrus.conf so that conf-lint knows the names of all your services and can check service-specific overrides.

To check your entire system's configuration you can use the conf-all action. This command takes all the system defaults, along with anything you have provided overrides for in your config files:

    cyr_info conf-all -C <path to imapd.conf> -M <path to cyrus.conf>

## 6. Upgrade specific items

Nothing special required when upgrading from 3.10.

## 7. Start new 3.12 Cyrus and verify

    sudo ./master/master -d

Check `/var/log/syslog` for errors so you can quickly understand potential problems.

When you're satisfied version 3.12 is running and can see all its data correctly, start the new Cyrus up with your regular init script.

If something has gone wrong, contact us on the mailing list. You can revert to backups and keep processing mail using your old version until you're able to finish your 3.12 installation.

Note

If you've disabled your system startup scripts, as recommended in step 2, remember to re-enable them. Use something like `systemctl enable cyrus-imapd` or `update-rc.d cyrus-imapd enable`

## 8. Reconstruct databases and cache

The following steps can each take a long time, so we recommend running them one at a time (to reduce locking contention and high I/O load).

To upgrade all the mailboxes to the latest version. This will take hours, possibly days.

    reconstruct -V max

To check (and correct) quota usage:

    quota -f

If you've been using CalDAV/CardDAV/all of the DAV from earlier releases, then the user.dav databases need to be reconstructed due to format changes.:

    dav_reconstruct -a

If have the reverseacls feature enabled in imapd.conf(5), you may need to regenerate the data it uses (which is stored in mailboxes.db). This is automatically regenerated at startup by `ctl_cyrusdb -r` if the reverseacls setting has changed. So, to force a regeneration:

> 1. Shut down Cyrus

> 2. Change reverseacls to 0 in imapd.conf(5)

> 3. Run ctl_cyrusdb(8) with the -r switch (or just start Cyrus, assuming your cyrus.conf(5) contains a ctl_cyrusdb -r entry in the START section). The old RACL entries will be removed

> 4. (If you started Cyrus, shut it down again)

> 5. Change reverseacls back to 1

> 6. Start up Cyrus (or run ctl_cyrusdb -r). The RACL entries will be rebuilt

There are fixes and improvements to caching and search indexing in 3.12. You should consider running reconstruct(8) across all mailboxes to rebuild caches, and squatter(8) to rebuild search indexes. This will probably take a long time, so you may wish to only do it per-mailbox as inconsistencies are discovered.

## 9. Do you want any new features?

3.12 comes with many lovely new features. Consider which ones you want to enable. Check the 3.12 release notes for the full list.

## 10. Upgrade complete

Your upgrade is complete, congratulations!

## Special note for Murder configurations

If you upgrade murder frontends before you upgrade all the backends, they may advertise features to clients which the backends don't support, which will cause the commands to fail when they are proxied to the backend.

Generally accepted wisdom when upgrading a Murder configuration is to upgrade all your back end servers first. This can be done one at a time.

Upgrade your mupdate master and front ends last.

Please note that you will be unable to set ANNOTATION-STORAGE or MAILBOX quotas (formerly known as X-ANNOTATION-STORAGE and X-NUM_FOLDERS) in a mixed-version murder environment until your frontends are upgraded to 3.10 (or later). Upgraded frontends know how to negotiate with older backends, but older frontends do not know how to negotiate with newer backends.

If you wish to use XFER to transfer mailboxes from an existing backend to your new 3.12 backend, you should first upgrade your existing backends to 3.10, 3.8, 3.6.1, 3.4.5, 3.2.11, or 3.0.18. These releases contain a patch such that XFER will correctly recognise 3.8 and later destinations. Without this patch, XFER will not recognise 3.12, and will downgrade mailboxes to the oldest supported format (losing metadata) in transit.