• Docker compose or Kubernetes installation of Hermod. See Install Hermod.

Download the new Hermod docker image and file structure from Nexus support portal. 

1. Log in to Nexus Support portal.
2. Go to Nexus Personal > Nexus Personal Messaging server and click a Hermod version to download the *.zip file. 
3. Unpack the *.zip file.
4. Open the folder which was extracted, for example 3.x.y.RELEASE.

The docker image can be loaded locally to each machine, or to the docker registry, and used remotely from several machines.

1. To load the released docker image locally on the target host, see this example:

   This does not work for Kubernetes deployments where the image must be hosted in a docker registry.

   Example: Load docker image

   > docker load -i hermod-3.x.y.RELEASE.tar

2. If you have a docker registry, load the image there.

Update your docker compose configuration with the new Hermod version:

1. Edit the configuration file docker-compose.yml and update the hermod/image element with the correct version.
   
   Example file path: example/compose/hermod/docker-compose.yml

   Example: docker-compose.yml

   version: '2'
   
   services:
   
   ....
   
     hermod:
       image: nexusgocontainerregistry.azurecr.io/nexus-personal/hermod:3.1.1.RELEASE
      
   ....

To update the Hermod configuration:

1. Edit the configuration file config/application.yml (config/cod-hermod.yml might be a link) with any new/updated values for your environment. Required updates will be available in the release notes.

   Example file path: example/compose/hermod/config/application.yml

Each release of Hermod contains SQL files per vendor/release in Flyway compatible format. No database updates are required as long as these files have not changed between versions. Required updates will be found in the release notes.

1. If the SQL files have changed, update your database manually or use Flyway (https://flywaydb.org/).

1. Start Hermod with the following command:

   Example: Start hermod

   > docker-compose up -d hermod
   > docker-compose logs -f

Update your Kubernetes deployment file with the new Hermod version:

1. Edit the deployment file hermod-deployment.yml and update the container/image element with the correct version.
   
   Example file path: hermod-deployment.yml

   Example: hermod-deployment.yml

   version: '2'
   
   services:
   
   ....
   
         spec:
           containers:
           - args: 
             image: nexusgocontainerregistry.azurecr.io/nexus-personal/hermod:3.1.1.RELEASE
      
   ....

To update the Hermod configuration:

1. Edit the Kubernetes configuration file for Hermod, for example, hermod-configuration.yml with any new/updated values for your environment. Required updates will be available in the release notes.

   Example: Reapply Hermod configuration

   > kubectl apply -f hermod-configuration.yml

Each release of Hermod contains SQL files per vendor/release in Flyway compatible format. No database updates are required as long as these files have not changed between versions. Required updates will be found in the release notes.

1. If the SQL files have changed, update your database manually or use Flyway (https://flywaydb.org/).

1. Reapply the Hermod deployment file in Kubernetes with the following command:

   Example: Start hermod

   > kubectl apply -f hermod-deployment.yml

2. Kubernetes will make sure that the new container starts, redirect any on-going traffic and thereafter shutdown the previous version.

• The Docker image has been renamed. The 'host' part is changed to nexusgocontainerregistry.azurecr.io 

• If you are updating Hermod from a version earlier than 2.4.1 to version 2.4.1 or higher, and are using Microsoft SQL Server you must alter the aliases table to use nvarchar instead of varchar for alias_name. This is required in order to be able to support unicode characters in the userid. This only applies to Microsoft SQL Server.

  IMPORTANT - this requires alter table to be executed. See V2.4.1__aliases_column.sql for sqlserver found in the release.

New indexes have been added for better performance. 

• If you are upgrading Hermod from a version earlier than 2.5.1 to version 2.5.1 or higher, make sure you run V2.5.1__new_indexes.sql. 

A new database table has been added. 

• If you are upgrading Hermod from a version earlier than 3.1.1 to version 3.1.1 or higher, make sure you run V3.1.1__lifesign_table.sql.