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<h1 id="upgrade-guide-v0024">Upgrade guide v0.0.24</h1>
<blockquote>
<p>[!NOTE]<br />
APIs are currently in <code>v1alpha1</code>, which implies that non backward compatible changes might happen. See <a href="https://kubernetes.io/docs/reference/using-api/#api-versioning">Kubernetes API versioning</a> for more detail.</p>
</blockquote>
<p>This guide illustrates, step by step, how to migrate to <code>v0.0.24</code> from previous versions, as some breaking changes have been introduced. See:</p>
<p><code>MariaDB</code>
- https://github.com/mariadb-operator/mariadb-operator/pull/248
- https://github.com/mariadb-operator/mariadb-operator/pull/312</p>
<p><code>Backup</code>
- https://github.com/mariadb-operator/mariadb-operator/pull/314</p>
<p><code>Restore</code>
- https://github.com/mariadb-operator/mariadb-operator/pull/308</p>
<p>Follow these steps for upgrading:</p>
<ul>
<li>Uninstall you current <code>mariadb-operator</code> for preventing conflicts:</li>
</ul>
<pre><code class="language-bash">helm uninstall mariadb-operator
</code></pre>
<p>Alternatively, you may only downscale and delete the webhook configurations:</p>
<pre><code class="language-bash">kubectl scale deployment mariadb-operator --replicas=0
kubectl scale deployment mariadb-operator-webhook --replicas=0
kubectl delete validatingwebhookconfiguration mariadb-operator-webhook
kubectl delete mutatingwebhookconfiguration mariadb-operator-webhook
</code></pre>
<ul>
<li>In case you are manually applying manifests, get a copy of your <code>MariaDB</code>, <code>Backup</code> and <code>Restore</code> resources, as the CRD upgrade will wipe out fields that are no longer supported:</li>
</ul>
<pre><code class="language-bash">kubectl get mariadb mariadb -o yaml &gt; mariadb.yaml
kubectl get backup backup -o yaml &gt; backup.yaml
kubectl get restore restore -o yaml &gt; restore.yaml
</code></pre>
<ul>
<li>Upgrade CRDs to <code>v0.0.24</code>:<blockquote>
<p>[!IMPORTANT]<br />
Helm does not handle CRD upgrades. See <a href="https://helm.sh/docs/chart_best_practices/custom_resource_definitions/#some-caveats-and-explanations">helm docs</a>.</p>
</blockquote>
</li>
</ul>
<blockquote>
<p>[!WARNING]<br />
This step will delete fields that are no longer supported in your resources.</p>
</blockquote>
<pre><code class="language-bash">kubectl replace -f https://github.com/mariadb-operator/mariadb-operator/releases/download/helm-chart-0.24.0/crds.yaml
</code></pre>
<ul>
<li>Perform migrations in your <code>MariaDB</code> resouces:</li>
</ul>
<pre><code class="language-diff"> metrics:
+ enabled: true
exporter:
- image: prom/mysqld-exporter:v0.14.0
+ image: prom/mysqld-exporter:v0.15.1
</code></pre>
<ul>
<li>Perform migrations in your <code>Backup</code> resouces:</li>
</ul>
<pre><code class="language-diff">- maxRetentionDays: 30
+ maxRetention: 720h
</code></pre>
<ul>
<li>Perform migrations in your <code>Restore</code> resouces:</li>
</ul>
<pre><code class="language-diff">- fileName: backup.2023-12-19T09:00:00Z.sql
+ targetRecoveryTime: 2023-12-19T09:00:00Z
</code></pre>
<ul>
<li>Upgrade <code>mariadb-operator</code> to <code>v0.0.24</code>:</li>
</ul>
<pre><code class="language-bash">helm repo update mariadb-operator
helm upgrade --install mariadb-operator mariadb-operator/mariadb-operator --version 0.24.0
</code></pre>
<ul>
<li>If you previously decided to downscale the operator, make sure you upscale it back:</li>
</ul>
<pre><code class="language-bash">kubectl scale deployment mariadb-operator -n default --replicas=1
kubectl scale deployment mariadb-operator-webhook -n default --replicas=1
</code></pre>
<ul>
<li>If you have previously created <code>MariaDB</code> instances with metrics enabled and a single replica, we also need to perform the following changes in order to create a new <code>StatefulSet</code> with <code>spec.serviceName</code> pointing to the internal <code>Service</code>(see https://github.com/mariadb-operator/mariadb-operator/issues/319 for context):</li>
</ul>
<pre><code class="language-bash">kubectl delete statefulset mariadb --cascade=orphan
kubectl rollout restart statefulset mariadb
</code></pre>
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