private async Task <Instance> CreateInstance(EC2InstanceConfig cfg)
{
var instanceType = cfg.instanceType.ToInstanceType();
var result = await _EC2.CreateInstanceAsync(
imageId : cfg.imageId,
instanceType : instanceType,
keyName : cfg.key,
securityGroupIDs : cfg.securityGroups,
subnetId : cfg.subnetId,
roleName : cfg.roleName,
shutdownBehavior : ShutdownBehavior.Stop,
associatePublicIpAddress : cfg.publicIp,
tags : cfg.GetTags(),
ebsOptymalized : cfg.ebsOptymalized,
rootDeviceName : cfg.rootDeviceName,
rootVolumeType : cfg.rootVolumeType,
rootVolumeSize : cfg.rootVolumeSize,
rootSnapshotId : cfg.rootSnapshotId,
rootIOPS : cfg.rootIOPS);
return(result.Reservation.Instances.FirstOrDefault());
}
public async Task Launcher(Instance[] instances, EC2InstanceConfig cfg)
{
if (cfg?.enabled != true)
{
throw new Exception($"Config {cfg?.name ?? "undefined"} is disabled and will not be processed.");
}
var targetName = cfg?.name?.Trim()?.ToLower();
if (targetName.IsNullOrEmpty())
{
throw new Exception($"Can't process config, name property was not defined in the configuration file.");
}
var namedInstances = instances?
.Where(x => x?.Tags?.Any(y => y?.Key?.ToLower() == "name" && y?.Value?.ToLower()?.Trim() == targetName) == true);
if (namedInstances?.Count() != 1)
{
throw new Exception($"WARNING! More then one instance with name '{targetName}' were found, config will not be processed.");
}
var instance = namedInstances?.FirstOrDefault();
var tags = instance?.Tags?.ToDictionary(x => x.Key, y => y.Value) ?? new Dictionary <string, string>();
var isRunning = (instance?.State.Code ?? -1) == (int)InstanceStateCode.running;
var isStopped = (instance?.State.Code ?? -1) == (int)InstanceStateCode.stopped;
var isTerminated = (instance?.State.Code ?? -1) == (int)InstanceStateCode.terminated;
var isStateDefined = isRunning || isStopped || isTerminated;
var on = cfg.on.IsNullOrEmpty() ? -2 : cfg.on.ToCron().Compare(DateTime.UtcNow);
var off = cfg.off.IsNullOrEmpty() ? -2 : cfg.off.ToCron().Compare(DateTime.UtcNow);
var kill = cfg.kill.IsNullOrEmpty() ? -2 : cfg.kill.ToCron().Compare(DateTime.UtcNow);
if (off == 0 && on == 0)
{
throw new Exception($"CRON On ({cfg?.on ?? "undefined"}) and Off ({cfg?.off ?? "undefined"}) of the {cfg?.name ?? "undefined"} instance are in invalid state, both are enabled, if possible set the cron not to overlap.");
}
if (!isStateDefined)
{
throw new Exception($"Instance state is undefined and can't be processed.");
}
if (instance == null || isTerminated) //if instance was not found or is terminated
{
if ((on == 0 || off == 0) && //if is on or off
kill != 0 && //and not killed
!cfg.terminate) //and should not be terminated, then create
{
Log($"{cfg?.name ?? "undefined"} => CREATING New Instance.");
instance = await CreateInstance(cfg);
Log($"{cfg?.name ?? "undefined"} => RESULT: New Instance {instance?.InstanceId} was created.");
}
return;
}
var forceKill = tags["redeploy"].ToIntOrDefault(0) < cfg.redeploy || cfg.terminate;
var forceRestart = tags["restart"].ToIntOrDefault(0) < cfg.restart || cfg.shutdown;
if (forceKill) // trigger instane kill
{
kill = 0;
on = -2;
}
else if (forceRestart) //trigger instance halt
{
off = 0;
on = -2;
}
if (isRunning && (off == 0 || kill == 0))
{
Log($"{cfg?.name ?? "undefined"} => STOPING Instance {instance.InstanceId} ({instance.GetTagValueOrDefault("Name")}), Cron: {cfg.off ?? "undefined"}");
var result = await _EC2.StopInstance(instanceId : instance.InstanceId, force : false);
Log($"{cfg?.name ?? "undefined"} => RESULT: Instance {instance.InstanceId} ({instance.GetTagValueOrDefault("Name")}), StateChange: {result.JsonSerialize(Newtonsoft.Json.Formatting.Indented)}");
return;
}
else if (isStopped && (on == 0 && kill != 0))
{
Log($"{cfg?.name ?? "undefined"} => STARTING Instance {instance.InstanceId}, Cron: {cfg.on ?? "undefined"}");
var result = await _EC2.StartInstance(instanceId : instance.InstanceId, additionalInfo : $"AWSLauncher Auto On, Cron: {cfg.on}");
Log($"{cfg?.name ?? "undefined"} => RESULT: Instance {instance.InstanceId}, StateChange: {result.JsonSerialize(Newtonsoft.Json.Formatting.Indented)}");
return;
}
else if (isStopped && kill == 0)
{
Log($"{cfg?.name ?? "undefined"} => TERMINATING Instance {instance.InstanceId} and removing Tag's, Cron: {cfg.off ?? "undefined"}");
var wiper = await _EC2.DeleteAllInstanceTags(instanceId : instance.InstanceId);
var result = await _EC2.TerminateInstance(instanceId : instance.InstanceId);
Log($"{cfg?.name ?? "undefined"} => Instance {instance.InstanceId}, StateChange: {result.JsonSerialize(Newtonsoft.Json.Formatting.Indented)}");
return;
}
if (!cfg.GetTags().CollectionEquals(tags)) //if tags changed
{
Log($"{cfg?.name ?? "undefined"} => UPDATING Instance Tags.");
var tagUpdate = await UpdateTagsAsync(_EC2, instance.InstanceId, cfg.GetTags());
Log($"{cfg?.name ?? "undefined"} => Instance Tags were {(tagUpdate ? "" : "NOT")} updated.");
}
}
