Over the weekend, I took some inspiration from a few different sources and put this together in action. Taking what Todd Sharp has mentioned on his blog (here) and what I’ve been doing with my #DaysOfArm article series (most recently here) and some of the things that I’ve been doing at home with learning how to code – then this is what’s been able to be achieved and some learnings and differences that I’ve taken with running Minecraft (on Arm).
Each of us will read this from our own perspective. Equally diverse are the outcomes and the actions that you might want to take away from this. So, I ask you: Be open. Find the opportunity. And execute.
This is something that we’ve built for the purposes of an infrastructure demonstration of Oracle Cloud Infrastructure (OCI). The code is available in an open public github repository and we’ve written articles on specific capabilities. We are open to collaborate in building more scenarios which allows this demonstration to scale.
Continue reading “Welcome To The OCI Arcade”We welcome you to the OCI Arcade
I’ll keep this short … I recently came across an update to one of the Oracle Cloud Infrastructure Quick Starts for WordPress. The specific addition that caught my eye was a micro deployment of WordPress – 1 x VM and 2 x Docker images (check out the repo here). I looked at that and thought:
This Terraform package would be good for Always Free Tier
Which it was, downloading the repository and created an Oracle Resource Manager Stack (learn more here) and applied the stack. And within minutes, I had a working instance of WordPress.
Yes – it is a single instance.
Yes – I could have built something that was more secured.
Yes – I could have built something that was more scalable – using MySQL Database Service or Oracle Kubernetes Engine.
But putting this altogether, I spent less than 10 mins on this and I can get going. And it is Always Free. The nice this is that I know that this model can expand as it requires (and only when I need to).
I thought about this for the upcoming hackathon too #WorldInnovationDay (https://hackmakers.com) where people are wanting a site to display their solutions. This is a way of doing it and keep it as part of their portfolio.
If you need an environment to try this out – head to the following link and sign-up. https://www.oracle.com/au/cloud/free/. If you are part of the hackathon, we are giving participants a promotion with $500USD credits into a new tenancy and no credit card. Try this out for yourself.
I was talking to Tim Middleton who works in the Coherence Development team the other day about different scenarios that we can work on some areas that demonstrate the scale out – two scenarios were obvious (to me) – Apache Spark was one and the other was Coherence – an In-Memory Data Grid.
And with that I built out the OCI Arcade to bring Coherence-CE (Community Edition) into the mix. There’s some lots of cool stuff that you can do with Coherence-CE and the bulk of the content is (here).
To get access to the OCI Arcade with Coherence – you can find these on a git branch in the repositories.
The simple use-case that we used Coherence-CE for was a simple identity key for the instance id (ie each game plays has a unique identifier). The nice thing was that it was all in Javascript. This following fragment was the only thing that I needed to do to integrate Coherence-CE into the app itself.
const opts = new Options()
opts.address = 'oci-cache:1408'
app.get('/id', (req, res) => {
var game_id = req.query.game_id;
var session = new Session(opts)
var map = session.getMap('oci-id')
setImmediate(async () => {
console.log('Map size is ' + (await map.size))
if ((await map.has(game_id)) == false) {
await map.set(game_id, { id : 1 })
res.send('{ "id" : 1 }');
} else {
res.send('{ "id" : '+(await map.invoke(game_id,Processors.increment('id',1)))+' }')
}
await session.close()
})
});From the Coherence-CE cluster perspective – there’s docker images from docker hub already (here) that I could use for it. So replacing what I did previously with Kafka in the deployment architecture and putting Coherence-CE in its place was simple. (NB: There were some changes in terms of stopping events being fired to Kafka and also creating the instance id from this method instead of a Date.now() method. Simple things).
There’s plenty of different directions that we can go from here – session-based cache scenarios, high-availability scenarios, in-memory data processing scenarios. There are plenty to extend and learn from.
If you want to try this out yourselves, you can get an Always Free Tier environment – head to the following link and sign-up. https://www.oracle.com/au/cloud/free/.
To get the whole thing up and running, then head to this previous blog to see how to get the OCI Arcade up and running (and playing) – https://redthunder.blog/2021/02/12/automating-with-oci-oracle-resource-manager/. Remember – use the coherence-ce branch.
Have fun learning, experimenting and if you want to contribute to any of these things – reach out. #CommunityMatters #ItTakesAVillage
Even in a day and age where event-based and real-time data exchange is prevalent and growing, the truth is there are still massive amounts of data exchanged using file transfer mechanisms. Oracle has always played in this realm, but with limited success. The Oracle Managed File Transfer (MFT) application is pretty good, but nothing to write home about… or write a blog about! 😀
One reason is because moving files around and using FTP servers is not very glamorous. Another reason is because the Oracle MFT management dashboard is pretty limited. It is able to monitor various aspects of a file transfer, report success or failure and allow you to resend files. But it has no business context or the ability to understand how a file might be part of a larger business process.
In a previous blog, I explained how to provision a new Kubernetes environment locally on physical or virtual machines, as well as remotely in the Oracle Public Cloud. In this workshop, I am going to show how to get started by deploying and running a Hello World NodeJS application into it.
There are a few moving parts involved in this exercise:
Continue reading “Teaching How to Get started with Kubernetes deploying a Hello World App”
In a previous blog, I explained how to treat your Infrastructure as Code by using technologies such as Vagrant and Terraform in order to help automate provisioning and decommissioning of environments in the cloud. Then, I evolved those concepts with this other blog, where I explained how to use Oracle PaaS Service Manager (PSM) CLI in order to provision Oracle PaaS Services into the Cloud.
In this blog, I am going to put together both concepts and show how simply you can automate the provisioning of Oracle Integration Cloud with Terraform and PSM CLI together.
To provision a new PaaS environment, I first create a “Build Server” in the cloud or as my boss calls it a “cockpit” that brings all the required bells and whistles (e.g. Terraform, PSM CLI, GIT, etc) to provision PaaS environments. I will add all the tooling it requires as part of its bootstrap process. To create the “Build Server” in the first place, I am using Vagrant + Terraform as well, just because I need a common place to start and these tools highly simplify my life. Also, this way, I can also treat my “Build Server” as “infrastructure as code” and I can easily get rid of it after I built my target PaaS environments and save with that some bucks in the cloud consumption model.
Once I build my “Build Server”, I will then simply git clone a repository that contains my scripts to provision other PaaS environments, setup my environment variables and type “terraform apply”. Yes, as simple as that!
This is a graphical view of what I will be doing:
Infrastructure as Code is becoming very popular. It allows you to describe a complete blueprint of a datacentre using a high-level configuration syntax, that can be versioned and script-automated. This brings huge improvements in the efficiency and reliability of provisioning and retiring environments.
Terraform is a tool that helps automate such environment provisioning. It lets you define in a descriptor file, all the characteristics of a target environment. Then, it lets you fully manage its life-cycle, including provisioning, configuration, state compliance, scalability, auditability, retirement, etc.
Terraform can seamlessly work with major cloud vendors, including Oracle, AWS, MS Azure, Google, etc. In this blog, I am going to show you how simple it is to use it to automate the provisioning of Oracle Cloud Infrastructure from your own laptop/PC. For this, we are going to use Vagrant on top of VirtualBox to virtualise a Linux environment to then run Terraform on top, so that it doesn’t matter what OS you use, you can quickly get started.
This is the high-level idea:
Continue reading “Teaching How to use Terraform to Manage Oracle Cloud Infrastructure as Code”
This blog is the second part of an end-to-end exercise that starts explaining the steps to clone a GitHub repository that contains an agnostic Medical Records application, built by us in NodeJS and which exposes REST API endpoints via a Swagger API-descriptor running locally on Swagger UI (all included as part of the repository). The previous part of this 2-blogs series also explains the steps required to run the MedRec NodeJS application on Docker containers either locally or in the Oracle Public Cloud. For more information about this first part, go here.
Moving to this second part, we are going to cover the following steps:
Continue reading “Teaching How to Design and Secure an API with Oracle API Platform”
In a previous series of blog posts titled Exploring Github DockerHub and OCCS
I walked through how to setup your development environment, install Docker, create a git project, link Docker Hub and GitHub accounts, trigger a build of a docker image on Docker Hub and then deploy and run the docker image using the Oracle Container Cloud Service.
In this blog I wanted to do something similar but this time focus on a more simplified process so that a less technical user could follow the steps without the need for a development environment. The way I have structured this post mans that you can follow every step using a web browser. I have attempted to focus more on consuming the dockerised application that a developer has already built. For the purpose of this exercise I am using the example Medical Records application that some of you may be familiar with from some of my previous blog posts. For those not familiar with the application, it consists of a Node.js web application that interacts with a MongoDB database. The web application surfaces a number of REST APIs (eg Get / POST Patient , GET / POST Physician, GET/POST Observations etc), and uses Swagger UI so that the REST APIs can be quickly interacted with by the end user.
If you want to follow the steps in this blog post you will need a login for GitHub and Docker Hub and also a subscription or trial account for the Oracle Cloud in order to use the Oracle Container Service Classic (OCCS).
For those unfamiliar with what Oracle currently offers in the container space, Oracle have brought two offerings to market:
Container Service Classic provides an easy and quick way to create an enterprise-grade container infrastructure. It delivers comprehensive tooling to compose, deploy, orchestrate, and manage Docker container-based applications on Oracle Cloud Infrastructure for Dev, Dev/Test, DevOps, and Cloud Native use cases. The second container offering is Oracle’s Container Native Platform is designed for DevOps teams to build, deploy, and operate container-based microservices and serverless applications using open source tools. It is an end-to-end container lifecycle management suite, including a managed Kubernetes service for creating and managing clusters, a private registry for storing and sharing container images, and a fully integrated CI/CD service to automate and manage deployments, all powered by enterprise-grade cloud Infrastructure.
For my walk through below the focus is on consumption of the Docker Image using the first generation OCCS offering and I hope to blog around a similar exercise using the Oracle Container Native Platform.
It is assumed that an OCCS service instance has already been provisioned. Previous blog posts document the steps required to Provision an OCCS Service Instance and also Using the Oracle Container Cloud Service . Of course, always check the product documentation to validate that the steps recorded are still current.
The flow of the ten steps in the diagram below cover the approach I took. Please note that most of the steps are a one-off activity and the productivity.
GitHub is a very popular hosted software source control service. As there is an existing git project for the ankimedrec-apis application you will take a copy of this existing project and add into your project library. If you don’t already have a GitHub account then sign up. Navigate in your browser to https://github.com .
Simply fill in the required mandatory details and press Sign Up for GitHub.
I chose the “Unlimited public repositories for free” option and pressed the Continue button.
You can then press the Submit button to submit your request for a GitHub account.
Click the “Start a project” button.
Before you can continue you should see that a further step is required in which you will need to validate the email address associated with your GitHub Account Sign Up.
Login to your email account and click the verify link in the email you received from GitHub.
In your browser session for GitHub account creation, you should see that “Your email was verified”.
With your GitHub account setup and your email verified, you will now create a new repository. Enter a name for your first Git repository eg myfirstproject , enter an optional description. Choose Public, and check the box to initialize the repository with a README file.
Click the green Create Repository button.
Soon afterwards you will see that a Git repository will be created under your login (eg jsmith001/myfirstproject).
Note that your repository has only a single README.md file. Files will extension of ‘.md’ are MarkDown files. According to Wikipedia , Markdown is a lightweight markup language with plain text formatting syntax. It is designed so that it can be converted to HTML and many other formats using a tool by the same name. Markdown is often used to format readme files, for writing messages in online discussion forums, and to create rich text using a plain text editor.
Obviously you can now upload other files to your first Git repository but for the remaining steps in this ‘How-To’ document you will focus on creating a fork of the ankimedrec-apis repository that contains the MedRec application project files. According to a GitHub Help article – A fork is a copy of a repository. Forking a repository allows you to freely experiment with changes without affecting the original project. Most commonly, forks are used to either propose changes to someone else’s project or to use someone else’s project as a starting point for your own idea.
To create a fork of the ankimedrec-apis repository owned by the user solutionsanz you will need to do the following.
While you are still logged into github.com, point your browser to https://github.com/solutionsanz . You should now be able to see all the public Git repositories owned by the user solutionsanz .
Next, click on the link ankimedrec-apis .
Click the fork button in the top right of the screen. This will start the copy of the repository from solutionsanz to your Github account which will take less than a minute.
After about a minute you should now see that a forked copy of the ankimedrec-apis project has been created in your GitHub account.
Ok so far so good, you should now have a GitHub account, and have forked the ankimedrec-apis project into your GitHub account. You can see that there are a number of files in the project.
Click the Dockerfile to view the steps that a very kind developer has defined in order to containerize the Node.js application. Also note the occs-stack.yml file which contains the docker compose / stack definition of the web application and the mongoDB which you will use later in this tutorial to define a stack within OCCS.
While GitHub provides a place to store and manage source code for your projects, Docker Hub is a place used to build, store and retrieve docker images.
To create a docker hub account for your user, simply point your browser to docker hub … https://hub.docker.com/ , fill in the details under ‘New To Docker?’ , verify that you are not a robot and click the Sign Up option.
You should get a message directing you to your email account for verification.
Login to the email account associated with your Docker Hub signup and confirm your email address.
Once you have confirmed your email address, you should be ready to login to Docker Hub.
Simply use the Sign-in option on the Docker Hub site, and enter your credentials.
Enter your username and password and click Login .
Assuming you have successfully signed in to Docker Hub, you have a little more setup to do.
Click on the drop down arrow next to your username.
The dropdown should reveal a sub menu of options, click Settings.
Click on the third tab across the top of the page … Linked Accounts and Services . You will link the Git and Docker Hub accounts such that certain activity in your GitHub account will trigger an automated build of a Docker image (containing the MedRec project) and then store the built docker image in Docker Hub where it can be pulled from into your OCCS environment.
Note that you can link to both GitHub and BitBucket. BitBucket provides a web based software version control system similar to GitHub.
Click the Link GitHub icon.
Select the Public and Private (Recommended) option.
Click the Authorize docker button
to setup the authorisation trust relationship (OAuth) between GitHub and Docker Hub.
Note: If you weren’t already signed into GitHub you would be prompted to do so.
As I was already authenticated to GitHub I could simply Authorise Docker Hub to be part of the OAuth trust.
GitHub will request your password confirmation before completing the OAuth setup.
Enter your GitHub password and press Confirm Password.
You should see the above image highlighting that your Docker Hub account is now linked to your GitHub account.
Creating an automated job is a very simple task and the official Docker documentation provides a good explanation;
You can build your images automatically from a build context stored in a repository.
A build context is a Dockerfile and any files at a specific location.
For an automated build, the build context is a repository containing a Dockerfile.
Automated Builds have several advantages:
Automated Builds are supported for both public and private repositories on both GitHub and Bitbucket.
As I want an automatic build of my docker image triggered by GitHub events I need to define my Automated Build.
I already have a Dockerfile in my ankimedrec-apis, so once I configure the automated build I should be good to go.
In Docker Hub, under the Create sub menu I chose Create Automated Build. This is where I specify the project git repository that I want Docker Hub to subscribe to for events.
I clicked the Create Auto-build GitHub icon.
From the list of repositories associated with your git hub account, choose the git repository you forked previously – ankimedrec-apis.
In the Create Automated Build page you can specify a repository name for docker image but I suggest that you accept the default repository name so that it matches the Github repository name. You can enter a description such as … “Docker build for ankimedrec-apis repository.”
Note: The description field has a 100 character limit.
Click the Create button.
The steps required are very well documented on the Docker Hub site but I have recorded them here so that this blog post is pretty much self-contained. Click the Build Details tab.
Note that no build of a docker image has been actioned yet.
Click on the Build Settings Tab.
Builds of a docker image can be triggered automatically (based on a commit/push of the git repository that is linked to the docker hub automated build.
Builds can also be triggered manually by pressing the trigger button on the Build Settings tab..
Click the Trigger button
Once a build has been triggered (either manually or automatically) the status of the build job is made available in the Build Details tab.
Within a few minutes, you should see a newly built image appear on the Docker Hub image Dashboard.
Periodically refresh the browser page to see status updates.
Initially the status will be Queued, then Building as per below screenshots.
A few bullet points gleaned from the official documentation covering how all this magic works.
If you click on the Repo Info tab within Docker Hub after the initial Docker build has successfully completed, you will see that the README information is now displayed under the Full Description section.
Next you will update one of the files (occs-stack.yml) in your ankimedrec-apis GitHub repository. The reason for this update two fold;
In your browser navigate to your GitHub repository
Click on the link to the occs-stack.yml file.
modify the line containing ‘index.docker.io/barackd222/ankimedrec-apis:latest’ to reflect your Docker Hub user (eg jsmith001 ) instead of barackd222 .
Note: you will need to copy the contents of this file later. When you do click the RAW button so the copy doesn’t include the line numbers.
Scroll down the page and enter the following information in the short and long descriptions within the Commit Changes area.
Press the Commit changes button. This will update the Master branch of your GitHub repository. Once this happens you should see soon after that a new Build of the docker image that will contain the ankimedrec-apis application will show on Docker Hub.
Note: Best practice would dictate that we should have development branches and not work directly on the Master branch, but in an attempt to keep this blog post as simple as possible I have cut corners.
In Docker Hub check the build status of your image under the Build Details tab.
Once you get a successfully built image you are now ready to create a Stack definition within the Oracle Container Cloud Service to pull down and run the docker image you just created.
With your Docker image built, login to your Oracle Cloud Account and access the MyServices Dashboard.
Click the hamburger icon on the bottom right of the Container Classic box.
Click Open Service Console, and then click the hamburger icon on the right of the Oracle Container Cloud Service Instance and choose Container Console.
In my example my Service was named dmrOCCS.
Login to the OCCS Container Console using the specified username / password provided by your Cloud Service Administrator.
Note: you will get a Security Exception as at this stage we don’t have a valid certificate recognised by the browser for our OCCS instance.
In Chrome browser the Security Exception will appear as follows.
Click Advanced to bring up the process to IP Address (unsafe) link…
Click the Proceed link
Enter your username (eg admin ) / password for the OCCS Container Console and press the Login button.
The Container Console should be displayed as per below. The console allows the user to create/edit/browse Services and Stacks, and deploy the Service and Stacks of interest to the Container Service runtime.
To clarify some of the terminology used within the console I have included the following definitions from the official Docker documentation ;
“- An image is a lightweight, stand-alone, executable package that includes everything needed to run a piece of software, including the code, a runtime, libraries, environment variables, and config files.
– A container is a runtime instance of an image—what the image becomes in memory when actually executed. It runs completely isolated from the host environment by default, only accessing host files and ports if configured to do so.
– Services – In a distributed application, different pieces of the app are called “services.” For example, if you imagine a video sharing site, it probably includes a service for storing application data in a database, a service for video transcoding in the background after a user uploads something, a service for the front-end, and so on. Services are really just “containers in production.” A service only runs one image, but it codifies the way that image runs—what ports it should use, how many replicas of the container should run so the service has the capacity it needs, and so on. Scaling a service changes the number of container instances running that piece of software, assigning more computing resources to the service in the process.
– A stack is a group of interrelated services that share dependencies, and can be orchestrated and scaled together. A single stack is capable of defining and coordinating the functionality of an entire application (though very complex applications may want to use multiple stacks).”
The occs-stack.yml file was included in the ankimedrec-apis repository as it defines the stack (web application service and mongodb database service) that will need to be deployed to OCCS. Services and Stacks need to pulled from a Registry in order for you to be able to deploy the image. An example registry definition for Docker Hub registry is included in the OCCS instance when it is created, but you will create a registry definition to Docker Hub using your Docker Hub credentials.
Click Registries in the left menu.
You should see a link to the docker hub image registry as part of the OOTB experience within OCCS.
You will essentially create a modified copy of this Registry Definition in order for you to target your image that was created previously and stored in Docker Hub.
As I have used this environment, my credentials were already added and the details validated, so we are good to go.
Ener your credentials as per below.
Press the Validate button
Press Save to save the registry configuration.
If the validation step worked successfully, then we are in good shape to pull the built docker image that was created previously from docker hub when we deploy our Stack.
A Stack is a composition of services and in our case the sample application (ankimedrec-apis) consists of a Node.js application service and a MongoDB database service.
After you have successfully deployed the stack within OCCS, you will have end up with two docker containers, one for the web application tier and one for the database tier.
The Stack configuration will deal with the networking between the two containers.
Click on Stacks in the left hand menu.
Click the New Stack button on the right of screen.
Enter a name for your Stack eg MyMedRecAPP then click the Advanced Editor link.
Next copy the contents of the occs-stack.yml you edited and committed previously.
Note: Use RAW format when copying from GitHub repository.
Copy the RAW content and then Paste it into the Advanced (YAML) Stack Editor as per below.
Click Done.
Note: we are only pulling one image from Docker Hub and from the screenshot above you will see that it is the web application tier.
Out of the box, the mongo image is defined as a service within OCCS and the image is available locally.
Click Save button.
Your newly created stack definition should appear as per screenshot below;
Now that you have created a Stack, your next step is to deploy the Stack to the Container Service.
Click the green Deploy button adjacent to your Stack definition.
Note that the Oracle Container Cloud Service Classic offers orchestration for the database and application tiers of the MedRec application.
Accept the default values of 1 per-pool (across hosts in this pool) for both the (Node.js) Web Application and (mongoDB) Database Tiers.
You will see that the required docker images are now being pulled from the local (OCCS) repository (eg mongo image) and / or the Docker Hub repository (ankimedrec-apis image).
You might see the screen change colour from green to orange and eventually to green as per screenshot below.
Once the containers have successfully started for both mongo and the web application tier then you will see a green RUNNING indicator on the screen.
With the application successfully deployed and running, the next thing for you to do is to interact with the deployed application.
In the sceenshot above you will see the Hostnames for the web application tier (dmroccs-occs-wkr-3).
Click on the hostname for the web tier in order to get additional information about the host, including public IP address and any other containers already deployed on the host.
In the example below you will see that the web app con and mongodb containers are both deployed and running on worker node 3.
Copy the Public IP address.
In a browser tab enter the following – http://xxx.xxx.xxx.xxx:3000 – where xxx is the IP address of the host you just copied.
You should now see the Anki-MedRec Application running.
Click the Blue GET button adjacent to /physicians, we will execute this to return any Physicians that have been created and stored within MongoDB.
Click the Try It Out button.
Click the Blue Execute button.
Note that the Response Body is an Empty Array.
Click the Green POST adjacent /physicians which will allow use
Click Try It Out button
You can now edit the sample Physician data or leave it as is ..
Click the Execute button
You should see that an HTTP-200 (Success) has been returned.
Now repeat the steps for the GET /physician to see if the data is retrieved.
Finally, within the Container Console, click on Images to see the image that was pulled from Docker Hub.
As a logical next step and in order to understand the steps required to cover the design of the secured API layer using Apiary.io and to secure the REST APIs that are part of the AnkiMedrec application using the Oracle API Platform check out this blog.
I hope you found this useful.
RedThunder.Blog 