Upgrading Helm releases

In the previous section, we installed PostgreSQL, so now let's try and upgrade it. We need to know how to do this because it will have to be upgraded from time to time.

For the upgrade, we are going to use the latest available PostgreSQL chart version, that is, 9.3.2.

Let's get and run the upgrade with the following command:

$ helm upgrade –i postgresql center/bitnami/postgresql --version=9.3.2 -f password-values.yaml

The output of the preceding command is shown in the following screenshot:

Figure 9.11 – Listing Helm releases

We ran the preceding helm upgrade command to change the postgresql chart version to 9.3.2, but we see the PostgreSQL version is still the same as it was, that is, 11.9.0, so that means the chart itself received some changes, but the application version was kept the same.

Running helm ls shows REVISION 2, which means the second release for the PostgreSQL chart.

Let's...