/// <summary>
/// Ensure that a Deployment resource exists for the specified database server.
/// </summary>
/// <returns>
/// The Deployment resource, as a <see cref="DeploymentV1Beta1"/>.
/// </returns>
public async Task <DeploymentV1Beta1> EnsureDeploymentPresent()
{
RequireCurrentState();
DeploymentV1Beta1 existingDeployment = await FindDeployment();
if (existingDeployment != null)
{
Log.LogInformation("Found existing deployment {DeploymentName} for server {ServerId}.",
existingDeployment.Metadata.Name,
State.Id
);
return(existingDeployment);
}
Log.LogInformation("Creating deployment for server {ServerId}...",
State.Id
);
DeploymentV1Beta1 createdDeployment = await KubeClient.DeploymentsV1Beta1().Create(
KubeResources.Deployment(State,
kubeNamespace: KubeOptions.KubeNamespace
)
);
Log.LogInformation("Successfully created deployment {DeploymentName} for server {ServerId}.",
createdDeployment.Metadata.Name,
State.Id
);
return(createdDeployment);
}
/// <summary>
/// Find the server's associated Deployment (if it exists).
/// </summary>
/// <returns>
/// The Deployment, or <c>null</c> if it was not found.
/// </returns>
public async Task <DeploymentV1Beta1> FindDeployment()
{
RequireCurrentState();
List <DeploymentV1Beta1> matchingDeployments = await KubeClient.DeploymentsV1Beta1().List(
labelSelector: $"cloud.dimensiondata.daas.server-id = {State.Id}",
kubeNamespace: KubeOptions.KubeNamespace
);
if (matchingDeployments.Count == 0)
{
return(null);
}
return(matchingDeployments[matchingDeployments.Count - 1]);
}
/// <summary>
/// Ensure that a Deployment resource does not exist for the specified database server.
/// </summary>
/// <returns>
/// <c>true</c>, if the controller is now absent; otherwise, <c>false</c>.
/// </returns>
public async Task <bool> EnsureDeploymentAbsent()
{
RequireCurrentState();
DeploymentV1Beta1 controller = await FindDeployment();
if (controller == null)
{
return(true);
}
Log.LogInformation("Deleting deployment {DeploymentName} for server {ServerId}...",
controller.Metadata.Name,
State.Id
);
try
{
await KubeClient.DeploymentsV1Beta1().Delete(
name: controller.Metadata.Name,
kubeNamespace: KubeOptions.KubeNamespace,
propagationPolicy: DeletePropagationPolicy.Background
);
}
catch (HttpRequestException <StatusV1> deleteFailed)
{
Log.LogError("Failed to delete deployment {DeploymentName} for server {ServerId} (Message:{FailureMessage}, Reason:{FailureReason}).",
controller.Metadata.Name,
State.Id,
deleteFailed.Response.Message,
deleteFailed.Response.Reason
);
return(false);
}
Log.LogInformation("Deleted deployment {DeploymentName} for server {ServerId}.",
controller.Metadata.Name,
State.Id
);
return(true);
}