I don't understand the use for AWS EC2 and RDS as separate services.
Is an EC2 instance a necessary prerequisite of launching an RDS instance? Can you have a database on your EC2 instance?
RDS is a database-as-a-service; you don't know or care what it is running on, because you don't install it, manage it or perform any of the maintenance on the box it runs on (i.e. software updates). AWS takes care of all of that for you and simply charges you by the hour for using the service.
You can install SQL Server or MySQL (or any other database) on your own EC2 instance, but now its your responsibility to administer. Both are valid uses cases, but in general, for small databases, and especially for test and dev databases, I install SQL Server on my own EC2 instances and manage it myself to have flexibility and save money.
For larger, more critical and production databases, RDS is often a better choice - at a higher cost. The best scenario for you will depend on a lot of things (your budget, your skills, the need for high availability etc).
You can install any databases on ec2 instance (whatever in windows or Linux). ec2 is a standalone virtual server with your fully control
But RDS service, you needn't care of the detail on how to install the database, set the environment, upgrade the version, backup/restore, multi-AZ setup, and so on, AWS RDS Service will take care all of them. Get it ready and you can immediately connect it and start your work. The way to provide RDS services are very similar as service elasticache (memcached & redis)
There is no require for you to launch a new ec2 instance for RDS service setup.
Don't mix ec2 and RDS. They are separate services.
Another way to make you understand this question is,
Amazon RDS is a Software as a Service (SaaS) that provides a full featured relational database service
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Many different AWS services use EC2 instances and you can understand that from the pricing pages.
Basically it's a multi-instance architecture (and not the more familiar multi-tenant approach that I personally use for most web applications).
When an AWS customer creates a new resource, internally AWS has to spin up a new EC2 instance, configure it, monitor its status and apply security patches and updates.
Does anyone know how do they connect to the VM to configure it?
Do they use SSH to connect or another protocol?
Or they use some kind of agent installed on the VM on first installation in order to apply the updates and changes?
Note: this question doesn't want to discuss the details of managing a database, I just want to know how AWS applies and updates the configuration of the EC2 instances when they offer a "managed" service (any service).
I recently realised my NEXT JS project I deployed on AWS Amplify uses Lambda but I need to deploy it on EC2. Is this possible at all?
I'm new to this whole thing so excuse the ignorance but for certain reasons I need to use EC2?
Is that possible?
Thanks
AWS EC2 is a service that provides all the compute, storage, and networking needs you may have for any application you want to develop. From its site:
Amazon EC2 offers the broadest and deepest compute platform with a choice of processor, storage, networking, operating system, and purchase model.
Source
Basically, you can create any number of virtual machines, connected among themselves and to the Internet however you like; and use any data persistence strategy.
There are many things to unpack when using EC2, but to start, I would suggest that you learn how to set up an EC2 instance using the default VPC that comes with your account. Be sure to configure the instance to have a public IP so you can access it through the Internet. Once inside, you can deploy your application however you like and access it through your public IP.
Before moving on, trying to decide why you need your app to run on EC2, Lambda is a SaaS (Software as a Service) product, meaning that all of the service provider's infrastructures are managed. On the other hand, EC2 is an IaaS product (Infrastructure as a Service) which means that you have to handle most of the infrastructure.
I am new to AWS, i am already having a godaddy VPS server, but my application is very slow when i hosted it in goDaddy VPS.
So i migrated to AWS, now my application works very fast, but some times the EC2 instance is getting failed and it automatically restarts after some times. since my application is basically an on-demand service app, these instance failure causes me to lose some conversations. So i heard about load balancing service from amazon, if one instance failed automatically turns the traffic to other instance.
I have used ubuntu 16.04 instance with vestaCP to host my application in AWS EC2. So is it possible to use the storage of my current-master EC2 instance with a new-alternative instance? so that same datas and database will be used by both the EC2 instances.
Might my question looks funny, but i need to know whether its possible or not? if possible any tutorials! if its not possible what kind of services need to use AWS load balancer to handle high traffic and instance failure.
Thanks
If you are migrating from a more conventional hosting to a cloud provider but you don't adopt a cloud architecture, you are missing out many of the benefits of the cloud.
In general, for a highly available, highly scalable web application, having shared data locally is an anti-pattern.
A modern web application would separate state (storage) from processing. Ideally your instance would hold only configuration and temporary data. For the database, assuming you are using a relational database, you would start a RDS instance. For the files, if they are mainly things like images and static content, you would probably use The Simple Storage Service, S3.
Your EC2 instance would connect to the RDS database and S3. Since the data is not local to the instance anymore, you can easily have multiple instances all using the same storage.
Your EC2 instances could be configured with autoscaling, so AWS would automatically add or remove instances responding to the real traffic you are seeing.
If you have complex storage needs and S3 is not enough for the file layer (and for most applications S3 should suffice), you can take a look at the Elastic File System.
Yes, It is achievable through ELB of AWS. But you have mention for separate requirement of ec2 instance, there is no need of such as AWS ELB manages all this for you.
Note: Always keep your database on another instance like 'AWS RDS' featuring data backup, rollback and if one instance fails then another instance have access to database. Same for files should be stored on 'AWS S3' then only you can achieve load balancing.
For more information.
link
AWS offers the option to run VMs on hardware hosts that are dedicated to a single customer (for compliance purposes, added security, etc).
This is available when using their Amazon EC2 Dedicated Instances
My question is: Do they offer similar hardware-level single-tenancy in their managed DB services ? (AWS RDS. For example using Oracle, or MySQL)
I looked for that option but cannot find it anywhere.
To run RDS on dedicated hardware, you need to create a dedicated VPC and then launch the RDS instance into that VPC. You also need to choose a DB instance class that is an approved EC2 dedicated instance type e.g. db.m3.medium.
For more, see Working with a DB Instance in a VPC.
While hosting my web app on cloud, should I install my db on the EC2 instance or should i use RDS service ? Some points come up :
Backing up would be automatic as EC2 instances are also backed up.
Wouldn't automatic scaling of resources compensate for any automatic scaling of db that RDS would provide ?
You can do either, and I have done both, but the absolute better practice is to use RDS for your database and EC2 for the websites, unless you have a really good reason not to (and if you are not sure if you have a good reason, then you probably don't).
I ran DB's on the instances using SQL Server for years, for a few low-traffic sites, and had no problems. I finally moved the last of these off of my EC2 instances and into RDS and wish I had done in years ago.
For a small, low-traffic site, you can get away with it, but as traffic picks up on your site, and you want to add the ability to autoscale your front-end, keeping the database on the instance is no longer an option. When you have upto 5-10-20 EC2 web instances balancing web traffic, and you want to add or remove instances dynamically to conserve resource (i.e. money), you'll be really happy the database is not on the single instance.
Besides that the automatic backups, the ability to restore to point-in-time, and they ability to take an RDS snapshot, and spin up a new RDS instance for development or testing purposes is really convenient.
Ultimately, everything that RDS does for you, you could do for yourselve using a fleet of EC2 instances, and a lot of time and money, but like I said, if you don't have the time, money or expertise (or the compelling reason) to set that redundancy up youself, then why bother.