ionutbalutoiu/charm-mssql

A Juju charm that deploys a MSSQL container and operator on Kubernetes

Deployment Preparation

This charm deploys on top of Kubernetes. It uses a submodule called the operator framework. If you are deploying from the charm store, this step is not necessary. If you are cloning from source, you need to update the submodule:

git clone https://github.com/canonical/charm-mssql.git
git submodule init
git submodule update

For developers of this charm, to fetch the latest updates in the operator framework, you need to pull the submodule git repository:

git submodule foreach git pull origin master

MicroK8s Setup

sudo snap install juju --classic --channel 2.8/candidate #or higher, stable version. 2.8 minimum
sudo snap install microk8s --classic
microk8s.enable dns dashboard registry storage
juju bootstrap microk8s
juju add-model mssql
juju deploy ./mssql

MSSQL config options

MSSQL_PID value: "Developer": Sets the container to run SQL Server Developer edition. Developer edition is not licensed for production data. If the deployment is for production use, set the appropriate edition (Enterprise, Standard, or Express). For more information, see How to license SQL Server: https://www.microsoft.com/sql-server/sql-server-2017-pricing.

persistentVolumeClaim: This value requires an entry for claimName: that maps to the name used for the persistent volume claim. This tutorial uses mssql-data.

#TODO: Set up as secret instead of env var once this is pushed LP:1858515 SA_PASSWORD: Configures the container image to set the SA password, as defined in this section.

valueFrom:
  secretKeyRef:
    name: mssql
    key: SA_PASSWORD

When Kubernetes deploys the container, it refers to the secret named mssql to get the value for the password.

By using the LoadBalancer service type, the SQL Server instance is accessible remotely (via the internet) at port 1433.

If you are deploying locally on top of MicroK8s, the service is reachable over the port-forwarding configuration. For example, for a service exposed like this:

NAMESPACE NAME           TYPE          CLUSTER-IP     EXTERNAL-IP  PORT(S)
mssql     service/mssql  LoadBalancer  10.152.183.16  <pending>    1443:32542/TCP

And a host of IP 192.168.1.75, then the service would be reachable at 192.168.1.75:32542.

SQL Utility

To communicate with the database, the sql utility comes handy. Instructions to install it on ubuntu are available here https://docs.microsoft.com/en-us/sql/linux/sql-server-linux-setup-tools?view=sql-server-ver15#ubuntu .

An example of command to connect to the database would be: sqlcmd -S 192.168.1.75,32038 -U sa -P "MyC0m9l&xP@ssw0rd"