View source for Unison:Software Rollback Tutorial

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==Software Rollback Instructions==
In some situations a Unison version upgrade can cause an unsuccessful upgrade, requiring starting from a previous version to fix. If this occurs, you can follow the steps below to rollback to a previous version of Unison you initially installed in your system.

===Steps to Rollback Unison Version:===
<ol>
<li>Navigate (<code>cd</code>) to the '''rollback''' directory (<code>/work/.rollback</code>).</li>
<pre>cd /usr/local/melissa/work/.rollback</pre>

<li>Copy the files from the version you want to rollback to into the '''''current''''' file locations.</li>
<pre>cp .config.1.2.18 /usr/local/melissa/work
cp docker-compose.yml.1.2.18 /usr/local/melissa/work/unisonMultiTemplate/docker-compose.yml
cp docker-compose.base.yml.1.2.18 /usr/local/melissa/work/unisonMultiTemplate/docker-compose.base.yml</pre>

<li>Navigate to the '''work''' directory (<code>/work</code>).</li>
<pre>cd /usr/local/melissa/work</pre>

<li>Load the environmental variables necessary to deploy the stack.</li>
<pre>for v in $(cat .config); do export $v ;done</pre>

<li>Navigate to the stack deployment '''config''' directory.</li>
<pre>cd /usr/local/melissa/work/unisonMultiTemplate</pre>

<li>Make sure the old stack is torn down.</li>
<pre>docker stack rm unison
docker container ls</pre>
<p style="margin:-10px 0 20px 0;">''(This should show nothing listed.)''</p>

<li>Log in to the server you are rolling back.</li>
<pre>docker login -u unison -p 9YJxcRTM1yRgz0xJagTw ucr.melissadata.net</pre>

<li>Deploy the stack.</li>
<pre>docker stack deploy -c docker-compose.yml --with-registry-auth unison</pre>

<li>Ensure the stack has come up</li>
<pre>docker service ls</pre>
<p style="margin:-10px 0 20px 0;">''(All should show 1/1 or 3/3, etc.)''</p>
</ol>


[[Category:Unison by Melissa]]