rhauch commented on a change in pull request #277:
URL: https://github.com/apache/kafka-site/pull/277#discussion_r465425702
##########
File path: 26/upgrade.html
##########
@@ -19,6 +19,48 @@
<script id="upgrade-template" type="text/x-handlebars-template">
+<h4><a id="upgrade_2_6_0" href="#upgrade_2_6_0">Upgrading from 0.8.x, 0.9.x,
0.10.0.x, 0.10.1.x, 0.10.2.x, 0.11.0.x, 1.0.x, 1.1.x, 2.0.x or 2.1.x or 2.2.x,
2.3.x, 2.4.x, 2.5.x to 2.6.0</a></h4>
+
+<p><b>If you are upgrading from a version prior to 2.1.x, please see the note
below about the change to the schema used to store consumer offsets.
+ Once you have changed the inter.broker.protocol.version to the latest
version, it will not be possible to downgrade to a version prior to 2.1.</b></p>
+
+<p><b>For a rolling upgrade:</b></p>
+
+<ol>
+ <li> Update server.properties on all brokers and add the following
properties. CURRENT_KAFKA_VERSION refers to the version you
+ are upgrading from. CURRENT_MESSAGE_FORMAT_VERSION refers to the
message format version currently in use. If you have previously
+ overridden the message format version, you should keep its current
value. Alternatively, if you are upgrading from a version prior
+ to 0.11.0.x, then CURRENT_MESSAGE_FORMAT_VERSION should be set to
match CURRENT_KAFKA_VERSION.
+ <ul>
+ <li>inter.broker.protocol.version=CURRENT_KAFKA_VERSION (e.g.
0.10.0, 0.11.0, 1.0, 2.0, 2.2).</li>
+ <li>log.message.format.version=CURRENT_MESSAGE_FORMAT_VERSION
(See <a href="#upgrade_10_performance_impact">potential performance impact
+ following the upgrade</a> for the details on what this
configuration does.)</li>
+ </ul>
+ If you are upgrading from version 0.11.0.x or above, and you have not
overridden the message format, then you only need to override
+ the inter-broker protocol version.
+ <ul>
+ <li>inter.broker.protocol.version=CURRENT_KAFKA_VERSION (0.11.0,
1.0, 1.1, 2.0, 2.1, 2.2, 2.3).</li>
Review comment:
I linked to the `inter.broker.protocol.version` config docs rather than
mentioning all of the values. They don't really correspond to the Kafka
versions anymore. Hopefully that makes sense and is useful.
##########
File path: 26/upgrade.html
##########
@@ -41,6 +83,48 @@ <h5><a id="upgrade_260_notable"
href="#upgrade_260_notable">Notable changes in 2
</li>
</ul>
+<h4><a id="upgrade_2_5_0" href="#upgrade_2_5_0">Upgrading from 0.8.x, 0.9.x,
0.10.0.x, 0.10.1.x, 0.10.2.x, 0.11.0.x, 1.0.x, 1.1.x, 2.0.x or 2.1.x or 2.2.x,
2.3.x, 2.4.x to 2.5.0</a></h4>
Review comment:
Ack
##########
File path: 26/upgrade.html
##########
@@ -41,6 +83,48 @@ <h5><a id="upgrade_260_notable"
href="#upgrade_260_notable">Notable changes in 2
</li>
</ul>
+<h4><a id="upgrade_2_5_0" href="#upgrade_2_5_0">Upgrading from 0.8.x, 0.9.x,
0.10.0.x, 0.10.1.x, 0.10.2.x, 0.11.0.x, 1.0.x, 1.1.x, 2.0.x or 2.1.x or 2.2.x,
2.3.x, 2.4.x to 2.5.0</a></h4>
+
+<p><b>If you are upgrading from a version prior to 2.1.x, please see the note
below about the change to the schema used to store consumer offsets.
+ Once you have changed the inter.broker.protocol.version to the latest
version, it will not be possible to downgrade to a version prior to 2.1.</b></p>
+
+<p><b>For a rolling upgrade:</b></p>
+
+<ol>
+ <li> Update server.properties on all brokers and add the following
properties. CURRENT_KAFKA_VERSION refers to the version you
+ are upgrading from. CURRENT_MESSAGE_FORMAT_VERSION refers to the
message format version currently in use. If you have previously
+ overridden the message format version, you should keep its current
value. Alternatively, if you are upgrading from a version prior
+ to 0.11.0.x, then CURRENT_MESSAGE_FORMAT_VERSION should be set to
match CURRENT_KAFKA_VERSION.
+ <ul>
+ <li>inter.broker.protocol.version=CURRENT_KAFKA_VERSION (e.g.
0.10.0, 0.11.0, 1.0, 2.0, 2.2).</li>
+ <li>log.message.format.version=CURRENT_MESSAGE_FORMAT_VERSION
(See <a href="#upgrade_10_performance_impact">potential performance impact
+ following the upgrade</a> for the details on what this
configuration does.)</li>
+ </ul>
+ If you are upgrading from version 0.11.0.x or above, and you have not
overridden the message format, then you only need to override
+ the inter-broker protocol version.
+ <ul>
+ <li>inter.broker.protocol.version=CURRENT_KAFKA_VERSION (0.11.0,
1.0, 1.1, 2.0, 2.1, 2.2, 2.3).</li>
Review comment:
Ack. Same change as above.
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