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Upgrade to major, minor, and patch Kong Enterprise releases using the
kong migrations commands.
You can also use the commands to migrate all Kong Gateway entities
to Kong Enterprise. See Migrating from Kong Gateway to Kong Enterprise.
If you experience any issues when running migrations, contact
Kong Support for assistance.
Upgrade Path for Kong Enterprise Releases
Kong adheres to semantic versioning, which makes a
distinction between major, minor, and patch versions. The upgrade path
for major and minor versions differs depending on the previous version from which
you are migrating.
Version Prerequisites for Migrating to Kong Enterprise 2.1
If you are not on Kong Enterprise 1.5.x, you must first incrementally
upgrade to 1.5.x before upgrading to 2.1.x. Zero downtime is possible but not
guaranteed if you are upgrading incrementally between versions, from 0.36.x to 1.3.x to 1.5.x.
- If running a version of Kong Enterprise earlier than 1.3,
migrate to 1.3 first.
- If running a version of Kong Enterprise earlier than 1.5,
migrate to 1.5 first.
Upgrade Considerations and Breaking Changes
Before upgrading, review this list for any configuration or breaking changes that
affect your current installation.
- If you are adding a new plugin to your installation, you need to run
kong migrations up with the plugin name specified. For example,
- The Portal Application Registration plugin
was in beta status for both 1.5.x and 2.1.x beta versions. Using the plugin in
a 2.1.x production environment requires a fresh installation and configuration
of the plugin. The 2.1.x plugin requires authentication to be configured separately
on the same Service. See
authorization provider strategy.
- The Rate Limiting Advanced plugin does not
cluster strategy in hybrid mode. The
redis strategy must be used instead.
- Hybrid mode. If
you are currently running 1.5.x in classic (traditional)
mode and want to run in hybrid mode instead, follow the hybrid mode
after running the migration. Custom plugins
(either your own plugins or third-party plugins that are not shipped with Kong)
need to be installed on both the Control Plane and the Data Plane in Hybrid mode.
- Custom plugins and entities.
If you have custom plugins and entities, there are some breaking changes and
extra steps you need to take when migrating to 2.1.x.
- The Kong Developer Portal has undergone a number of breaking changes. If you
are currently using the Developer Portal, it will no longer work without
manually migrating files.
Migrating from 1.5.x (or 2.1.x-beta) to 2.1.x
Note: There is not an upgrade migration path from 1.5.x to 2.1.x-beta.
Kong Enterprise supports the zero downtime migration model. This means
that while the migration is in process, you have two Kong clusters with different
versions running that are sharing the same database. This is sometimes referred
to as the
blue-green migration model.
The migrations are designed so that there is no need to fully copy
the data. The new version of Kong Enterprise is able to use the data as it
is migrated, and the old
Kong cluster keeps working until it is finally time to decommission it. For this
reason, the full migration is split into two commands:
kong migrations up: performs only non-destructive operations
kong migrations finish: puts the database in the final expected state (DB-less
mode is not supported in Kong Enterprise)
- Download 2.1.x, and configure it to point to the same datastore as your old
1.5.x (or 2.1.x-beta) cluster.
kong migrations up.
After that finishes running, both the old (1.5) and new (2.1) clusters can
now run simultaneously on the same datastore. Start provisioning 2.1 nodes,
but do not use their Admin API yet.
Important: If you need to make Admin API requests,
these should be made to the old cluster’s nodes. This prevents
the new cluster from generating data that is not understood by the old
- Gradually divert traffic away from your old nodes, and redirect traffic to
your 2.1 cluster. Monitor your traffic to make sure everything
is going smoothly.
- When your traffic is fully migrated to the 2.1 cluster, decommission your
old 1.5 (or 2.1.x-beta) nodes.
- From your 2.1 cluster, run
kong migrations finish. From this point onward,
it is no longer possible to start nodes in the old 1.5 (or 2.1.x-beta) cluster
that still points to the same datastore. Run this command only when you are
confident that your migration was successful. From now on, you can safely make
Admin API requests to your 2.1 nodes.
Installing 2.1 on a fresh datastore
For installing on a fresh datastore, Kong Enterprise 2.1 has the
kong migrations bootstrap command. Run the following commands to
prepare a new 2.1 cluster from a fresh datastore. By default, the
kong CLI tool
loads the configuration from
/etc/kong/kong.conf, but you can optionally use
-c flag to indicate the path to your configuration file:
$ kong migrations bootstrap [-c /path/to/kong.conf]
$ kong start [-c /path/to/kong.conf]
There are no migrations in upgrades between current or
future patch releases of the same minor release of Kong Enterprise
(for example, 126.96.36.199 to 188.8.131.52; 184.108.40.206 to 220.127.116.11, and so forth). Therefore,
the upgrade process is simpler for patch releases.
Assuming that Kong Enterprise is already running on your system,
acquire the latest version from any of the available
and install it, overriding your previous installation.
If you are planning to make modifications to your configuration, this is an
opportune time to do so.
Run migrations to upgrade your database schema:
$ kong migrations up [-c configuration_file]
If the command is successful, and no migration ran (no output),
then you only have to
$ kong reload [-c configuration_file]
kong reload command leverages the Nginx
reload signal that
seamlessly starts new workers, which then take over from old workers before they
are terminated. Kong serves new requests using the new
configuration without dropping existing in-flight connections.