private async Task WaitForInstanceToBecomeHealthyAsync(
LoadBalancer loadBalancer,
Instance newInstance)
{
bool IsUnhealthy()
{
var instanceHealth = loadBalancer
.InstanceHealthSummary
.SingleOrDefault(x => x.InstanceName == newInstance.Name);
return instanceHealth?.InstanceHealth != InstanceHealthState.Healthy;
}
var stopwatch = this.time.StartStopwatch();
do
{
await this.time.WaitAsync(5000);
if (stopwatch.Elapsed.TotalMinutes > 30)
{
throw new NewInstanceHealthTimeoutException(
$"The newly deployed instance {newInstance.Name} was not healthy after 5 minutes.");
}
loadBalancer = await mediator.Send(new GetLoadBalancerByNameQuery(loadBalancer.Name)) ??
throw new InvalidOperationException("Could not refresh load balancer status.");
} while (IsUnhealthy());
}
private async Task AttachInstanceToLoadBalancerAsync(
Instance instance,
LoadBalancer loadBalancer)
{
await mediator.Send(new AttachInstancesToLoadBalancerCommand(
loadBalancer.Name,
new[]
{
instance.Name
}));
}
private async Task DestroyOldInstancesAsync(
LoadBalancer loadBalancer,
Instance newInstance)
{
var oldInstanceNames = loadBalancer
.InstanceHealthSummary
.Where(x => x.InstanceName != newInstance.Name)
.Select(x => x.InstanceName);
foreach (var oldInstanceName in oldInstanceNames)
{
logger.Warning("Deleting old instance {InstanceName}.", oldInstanceName);
await DestroyInstanceByNameAsync(oldInstanceName);
}
}
private async Task AssignStaticIpAddressToNewInstanceAsync(Instance newInstance)
{
await this.mediator.Send(new AssignStaticIpToInstanceCommand(
newInstance.Name,
ipName));
}
