Cloud based applications often need databases to store their data. Cloud providers such as Azure, AWS, and Google Cloud Platform (GCP) all offer database Platform as a Service (PaaS) which allows you to create a database server without having to create the underlying infrastructure that goes along with it. These servers are fully managed by the cloud platform provider, allowing you to focus on delivering software instead of worrying about maintenance. This can easily be automated using a runbook.
In this example, we’ll create a MySQL database server on Google Cloud.
gcloud CLI and authorization Most of the commands used for interacting with Google in this next section make use of the Google Cloud CLI. To use the gcloud CLI you usually need to authorize it. For further information on gcloud authorization, please refer to the documentation.
Create the runbook
- To create a runbook, navigate to Project ➜ Operations ➜ Runbooks ➜ Add Runbook.
- Give the runbook a name and click SAVE.
- Click DEFINE YOUR RUNBOOK PROCESS, then click ADD STEP.
- Add a Run a script step to check to see if the server already exists:
$zone = $OctopusParameters["GCP.Zone"]
$projectName = $OctopusParameters["Project.GCP.ProjectName"]
$instanceName = $OctopusParameters["Project.GCP.MySQL.InstanceName"]
Write-Host "Getting list of MySQL instances with name: $instanceName"
Write-Host "##octopus[stderr-progress]"
$Names=(& gcloud sql instances list --project=$projectName --filter="name=$instanceName" --format="get(name)" --quiet) -join ", "
Test-LastExit "gcloud sql instances list"
$dbDoesntExist = $true
if( -not ([string]::IsNullOrEmpty($Names)))
{
Write-Highlight "Found MySQL instance: $Names"
$dbDoesntExist = $false
}
else {
Write-Highlight "Found no mysql instance matching $instanceName"
}
Set-OctopusVariable -name "DatabaseDoesntExist" -value $dbDoesntExist
- Add another Run a script with the run condition of
#{Octopus.Action[Check if MySQL instance exists].Output.DatabaseDoesntExist}is true:
$zone = $OctopusParameters["GCP.Zone"]
$projectName = $OctopusParameters["Project.GCP.ProjectName"]
$instanceName = $OctopusParameters["Project.GCP.MySQL.InstanceName"]
$machineTier = $OctopusParameters["Project.GCP.MySQL.MachineTier"]
$storageType = $OctopusParameters["Project.GCP.MySQL.StorageType"]
$storageAutoIncreaseLimit = $OctopusParameters["Project.GCP.MySQL.StorageIncreaseLimitInGB"]
$vpcNetworkName = $OctopusParameters["GCP.Network.VPC.Default"]
$rootPassword = $OctopusParameters["MySQL.Database.Admin.UserPassword"]
Write-Host "Running gcloud beta sql instances create"
Write-Host "##octopus[stderr-progress]"
& gcloud beta sql instances create $instanceName `
--tier=$machineTier `
--root-password=$rootPassword `
--zone=$zone --project=$projectName `
--no-backup `
--network=$vpcNetworkName `
--storage-type=$storageType `
--storage-auto-increase `
--storage-auto-increase-limit=$storageAutoIncreaseLimit `
--no-assign-ip `
--quiet
Test-LastExit "gcloud beta sql instances create"
Write-Host "Completed creating mysql instance"
- Add project variables for use with the scripts
If you have a keen eye, you may have noticed that the script above uses the gcloud beta option to create the MySQL database server. This is done to allow use of the --network flag where you can specify a specific network in which to place the database server. This can be useful if you want to specify a private ip address for your server.
In just a few steps, you’re able to create a MySQL database server on GCP.
Samples
We have a Pattern - Rolling Space on our Samples instance of Octopus. You can sign in as Guest to take a look at this example and more runbooks in the PetClinic Infrastructure project.
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Page updated on Sunday, January 1, 2023