Category Archives: Cloud

Knowledge Resources from Oracle

05 Tuesday Apr 2022

Posted by in Cloud, General, Oracle, Technology

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Before joining Oracle I used to typically refer to a couple of key resources from Oracle – docs.oracle.com, and occasionally developer.oracle.com and ateam-oracle.com. We’d obviously use cloud.oracle.com and the main oracle.com to be able to reference published stats, success references etc. Now I’m part of the company and working in the OCI product team with an outbound side of things, I needed to gem up on all the assets that exist. So that we can help contribute, and ensure that they are up to date etc. In doing so, the number of resources available is so much more than I’d realized.

Upon reflection, this may have been from the fact we didn’t drill down deeply enough, also in part that Capgemini has its own approaches and strategies as well.

This in part is linked to the organizational structures e.g. OCI Product Management’s outbound work overlaps with the Marketing Developer Relations, for example, something that is inevitable in an organization that provides such a diverse portfolio of products.

For my own benefit, and for others to exploit, the following table summarises the different areas of information. The nature of the content and – where content overlaps or is presented in different ways.

We’ve moved this content so it can be easily revised to here (and accessible from the site menu). But also available here …

Domain AddressDescription
oracle.comThis is the commercial side of the Oracle content. But includes a landing page for a lot of Oracle knowledge/documentation.
docs.oracle.comThe home of the core Oracle documentation for all products.
blogs.oracle.comOracle blogs primarily from Oracle staff covering different parts of the organization, covering employment diversity through to each of the major product families, domain verticals such as Retail, Hospitality. The blogs are broken into groups, so it’s worth bookmarking the product groups of interest, for example, Infrastructure.
In addition to the product spaces, there are blogs that come from teams such as the A-Team – Infrastructure, Java Magazine,
A-TeamThe members of this team are the ‘gurus’ of product application. These cover a range of domains – structured in a similar way to blogs.oracle.com with different posts. These posts represent patterns and solutions to problems encountered by the team. How to, or not to implement things.
This can overlap with some blogs in so far as both product blogs and A-Team blogs may address how to leverage product features.
developer.oracle.comDeveloper relations lead, which covers not only Oracle products but also the application of open source. By its very name, there is a strong emphasis on coding (rather than low-code) covering not just Java, but .Net languages such as C#, Node, JavaScript, and so on.
There is some content overlap here with the Architectural Center, where Architecture Centre provides reference solutions.
docs.oracle.com/solutions
(AKA Architecture Center)		This is the Architecture Center which provides reference solutions. But these aren’t exclusive to the SaaS products (which would be easy to interpret). A lot of examples cover deploying and running open-source solutions on IaaS, for example, Drupal, WordPress, and Magento to name just a couple. A lot of these are backed up with scripts, Terraform, and code to achieve the deployment and configuration.
In addition to this, there are use cases of what customers have deployed into production (known as built and deployed).
docs.oracle.com/learn/This contains a lot of free tutorials and labs that can be taken a run to implement different things, from deploying a Python with Flask solution on Kubernetes to Creating USB Installation Media for Oracle Linux with Fedora Media Writer. As you can see from these examples, the tutorials cover both Oracle products and open source.
These resources interlink with the Architecture Centre and can overlap with developer.oracle.com.
github.com/oracle-devrelThis contains the code artifacts developed by Developer Relations and the Architecture Center team. So covers Reference Architectures, tutorials, and Live Labs all freely available to use.
github.com/oracle-samplesThis repository contains example solutions and Terraform logic developed by groups such as the A-Team.
opensource.oracle.comThis provides a catalog of links to the various open-source repositories available. This includes oracle-sample and devrel but also the many other projects including, but not limited to Helidon, Fn, Verrrazano, GraalVM, Apiary
community.oracle.com/hubThis is where a lot of the Q&A for Oracle Partners and users takes place. Community participation is gamified to encourage participation.
academy.oracle.comThis is really for the educational community (Universities, Colleges & Schools) and provides resources to take you from zero to certified skills for Java and Oracle Database.
education.oracle.comPrimarily for the formal Oracle certification resources, but there are some free training resources here as well.
apex.oracle.comAPEX has its own area of dedicated resources. This includes solutions, templates, and other development resources, and community.
github.com/oracleThis is the home for the majority of all Oracle free code, including the Open source projects such as Helidon, JET, Kubernetes Operators, and so on.
Helidon, Fn, and other source projectsA number of Oracle open source projects have their own independent web resources as well. Helidon includes additional technical resources.
The ones we know more about are :
Helidon, Fn, Verrrazano, GraalVM, Apiary
Bit it includes references to Java core language etc.
www.youtube.com/oracleYouTube training videos. With multiple channels based on different technologies.
Java (OpenJDK and Oracle JDK)Oracle propel not just their main JDK /JRE which has license constraints, but also Open JDK. With this comes a dedicated Developer zone as dev.java.
PaaS CommunityManaged by Jurgen Kress (Prod Mgr for Oracle PaaS). It acts as an aggregator for contributions from the community and shares news about what is happening within Oracle to support customers and partners in the PaaS space.
Developer CommunityPartner site to the PaaS Community with a focus on more development activities around Weblogic, Helidon, etc.
Oracle PodcastsPerhaps not access usable as documentation, how-to etc. but Podcasts can yield a lot of broad picture insights. Oracle has a range of podcasts covering a diverse range of subjects. Not all podcasts are active at any one time. But the site provides a catalog and episode list.

Kubernetes Best Practises – Review & Mindmaps

13 Thursday Jan 2022

Posted by in APIs & microservices, Cloud, Cloud Native, development, General, Technology

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I’ve had some time to catch up on books I’d like to read, including Kubernetes Best Practises in the last few weeks. While I think I have a fair handle on Kubernetes, the development of my understanding has been a bit ad-hoc as I’ve dug into different areas as I’ve needed to know more. This meant reading a Dummies/Introduction to entry style guide would, to an extent, likely prove to be a frustrating read. Given this, I went for the best practises book because if I don’t understand the practises, then there are gaps in my understanding still, and I can look at more foundation resources.

As it goes, this book was perfect. It quickly covered the basics of the different aspects of Kubernetes helping to give context to the more advanced aspects, and the best practices become almost a formulated summary in each section. The depth of coverage and detail is certainly very comprehensive, explaining the background of CNI (Container Network Interface) to network-level security within Kubernetes.

The book touched upon Service Meshes such as Istio and Linkerd2 but didn’t go into great depth, but again this is probably down to the fact that Service Mesh ideas are still maturing, and you have initiatives like SMI (Service Mesh Interface still in the CNCF’s sandbox).

In terms of best practices, that really stood out for me:

  • Use of Taints and Tolerations for refined control of pod deployment (Allowing affinity to be controlled to optimise resilience, or direct types of pod deployment to nodes with specialist capabilities such as GPU).
  • There are a lot more differences and options then you might realize in terms of ingress controller capabilities, so take time to identify what you may need from an ingress controller.
  • Don’t forget pods can be scaled vertically with the VPA (Vertical Pod Autoscaler)as well as horizontally through the HPA.
  • While using a managed persistence service will make statement storage a lot easier, stateful sets will give you a very portable solution.

As with a lot of technical books I read. As I go through the book I build up a mind map of what I think are the key points. Doing so leaves me with a resource I can use as a quick reference, but creating the mind map helps reinforce the learning. So here is the mind map …

Greening our work compute needs

13 Monday Dec 2021

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As a consultant working with clients, we always need to address security considerations for clients, their networks and data. Typically this might mean ensuring I could connect to the correct network through a VPN with the secure client software installed. Then work through a Citrix set-up for the tools we’re allowed to use.

Since the start of the pandemic, there seems to be a marked shift towards issuing consultants with customer provided laptops that have been configured and locked down. This means I can’t use the client laptop to connect to my employer’s network to interact with our own systems – making it easy to leverage our existing resources to support the customer and conversely no trust or contractual position that might allow our company devices connecting to a VPN or ring-fenced part of a network.

Interestingly there seems to have been a drift away from the ideas of BYOD (Bring Your Own Device) which may come from the fact that outside of smaller very tech-savvy organizations, BYOD can be seen as challenging to support.

As this Google Trends report shows over the last five years the trend has been until the last couple of months showing a generally downward trend. Not authoritative proof, but hints that it hasn’t accelerated as you might expect given remote working.

By the customer supplying a laptop, there is an effort to control intrusion and other security risks. But the problem is, now I have a device that I could easily take off-line and work to defeat the security setup and the client would be non the wiser, or worse it is another laptop that could ‘get lost’ or ‘stolen’ with a greater chance of having sensitive material. Every new device is without a doubt an elevated risk for the client and a cost to support (this of course is also an argument for not applying BYOD).

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Automating OCI Tasks with OCI Python SDK #JoelKallmanDay

11 Monday Oct 2021

Posted by in Cloud, development, General, Oracle, Oracle Cloud Native, Technology

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This isn’t the first time I’ve written about the Oracle Cloud SDK (check here), but it seems rather fitting, as some of the utilities I’ve been working on are open to the community, and #JoelKallmanDay is all about community. If you’d like to know more about #JoelKallmanDay then checkout Tim Hall’s blog here.

Oracle have provided a very rich API and then overlaid it with a number of SDKs in Python, Java etc. The SDKs immediately remove the work of creating connections and correct payloads. Taking the Python SDK for example, all I need to do is create a standard configuration file with all the necessary connection properties to my OCI instance. Then it’s simply a case of creating the correct Python object for the correct group of services wanted. Then it’s down to populating the object attributes. This is the illustration of exactly what a good SDK does. I can lean on my IDE to use the correct set and get operators. The code for establishing a connection is done for me.

What I’ve found most striking is the level of consistency in the methods provided by the SDK regardless of the service. This makes it very easy to develop functionality without needing to check every API before I can write any code. it would be easy to say, so what. But when you look at the breadth of the OCI services it becomes more impressive.

The convenience doesn’t end there. Rather than having to run your utilities from a local command line (Python means we’re pretty much OS agnostic), the Oracle Cloud shell is preconfigured with Python, OCI SDK, GitHub and FTP server and basic Linux text editors. The all amounts to the fact that you can use your scripts/tools from within the web UI of OCI. Edit your credentials file locally, push and pull any changes to the scripts from the shell and any Git repo such as GitHub.

With this insight, we just need to build that catalogue of accelerator tools to make those repetitive processes just a little easier. For example ensuring that when you tear down your manually created services all interlinked entities are deleted first (which can be troublesome with policies, groups, compartments and so on).

Integration Cloud or SOA Suite?

02 Thursday Sep 2021

Posted by in Cloud, General, OIC - ICS, Oracle, Technology

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A periodic conversation I get involved is the the relationship between Oracle’s SOA Suite and Integration Cloud. We’ve long held a view based on our conversations with Oracle product management.

There is a formal statement of direction for SOA Suite available ….

Click to access fusion-middleware-statement-of-direction.pdf

The bottom line as we read it:

  • SOA Suite isn’t going to be scrapped and customers will not be forced onto Integration Cloud.
  • Future changes are going to be on making transitions easier to the cloud, and a customer decision to adopt OIC.
  • Releases will focus on keeping things up to date and aligned with the underlying technologies from Java 8 to Java 11 as a long term release of Java. WebLogic version updates.
  • We’ll see mechanisms to cloud deliver integrations as the primary focus.
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Another post on blogs.oracle.com

19 Monday Jul 2021

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Just a quick post to say that I’ve had another post published over on Oracle’s blog site about Automating developer setup in Oracle Cloud Infrastructure. You can read it at: https://blogs.oracle.com/cloud-infrastructure/post/automating-developer-setup-in-oci

Oracle Cloud + GitHub Actions

05 Monday Jul 2021

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While there is a deserved amount of publicity around the introduction of ARM compute onto OCI with the ARM Ampere CPU offering, and the amazing level of always free compute being provided (24GB of memory and 4 cores which can be used in any combination of servers). There have been some interesting announcements that perhaps haven’t drawn as much attention that they deserve. This includes OCI support for GitHub Actions, plus several new DevOps services and an Artifact Registry. We’ll comeback to the new services in another post. Today, let’s look at GitHub Actions.

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Restriction on custom logging for OCI always free

26 Wednesday May 2021

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OCI Always Free compute node has a restriction that isn’t clearly documented or obvious when you go to a instantiate such compute resources. That restriction is the absence of OCI Custom logging. This is a little surprising given that this capability is based on Fluentd and the compute footprint needed by Fluentd is so small. In the following screen shot, as you can see when configuring the compute, there is no reason to believe you can’t use OCI Logging for custom logs.

Configuration for a logging agent on the Always Free VM

But when you go to configure the custom logging on your running compute, you can see that the feature is disabled with the message about the restriction. It would have been nice, to have the warning on the creation phase, as if I’d manually setup the VM then went to switch on OCI Logging knowing where I’d deployed my applications, I’d have wasted time in the setup.

Custom Logging Limitation

Solution, use one of the AMD Flex or Previous Generation to minimize the footprint to your needs.

UPDATE 09th June 2021

We’ve been told that the this constraint has been addressed. In addition Oracle also introduced the new Ampere offering which allows for nodes with a form factor of upto 4 OCPU and 24GB of RAM using the new ARM chips. You can also use variations on this such as 4x 1 OCPU 6GB RAM

OKit – OCI Design (on Windows)

08 Tuesday Dec 2020

Posted by in Cloud, General, Oracle, Technology

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OKit is a tremendous tool for the visual design and development for your Oracle Cloud environment. Visualizing your networks, positioning of service gateways and so on makes it a lot easier than filling in web forms or writing Terraform files as you can see the relationships between the different parts far more easily. For the same reason really that a lot of people use Visio and other tools for this work. The real beauty is that OKit can generate the Terraform and Ansible scripting that can then be used to deliver the implementation.

Okit for visual design of Oracle Cloud

The tool isn’t currently an official Oracle product, but something built by the Oracle A-Team (a small team of gurus who have a role blending developer advocacy, architect supporting customers for the special edge cases and providing thought leadership). But we can hope that someone brings it into the fold and perhaps even incorporates it securely into the cloud dashboard. In the mean time, the code in its entirety is available on GitHub.

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Data Integration with Oracle

15 Tuesday Sep 2020

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Oracle’s data integration product landscape outside of GoldenGate has with the arrival of Oracle Cloud been confusing at times. This has meant finding the right product documentation can be challenging, and knowing which product to use in your own technology road-map can be harder to formulate. I believe the landscape is starting to settle now. But to understand the position, let’s look at the causes of disturbance and the changes that have occurred.

Why the complexity?

This has come from I think a couple of key factors. The organizational challenges triggered by Thomas Kurian’s departure which has resulted in rather than the product organization being essentially in three parts aligning roughly to Infrastructure, Platform and Applications to being two Infrastructure and Apps. Add to this Oracle’s cloud has gone through two revolutions. Generation 1 now called Classic was essentially a recognition that they needed an answer to Microsoft, Google and AWS quickly (Oracle are now migrating customers off classic). Then came Generation 2, which is a more considered strategy which is leveraging not just the lowest level stack of virtualization (network and compute), but driving changes all the way through the internals of applications by having them leverage common technologies such as microservices along with a raft of software services such as monitoring, logging, metering, events, notifications, FaaS and so on. Essentially all the services they offer are also integral to their own offerings. The nice thing about Gen2 is you can see a strong alignment to CNCF (Cloud Native Compute Foundation) along with other open public standards (formal or de-facto such as Microprofile with Helidon and Apache). As a result despite the perceptions of Oracle, modern apps are standard a better chance of portability.

Impact on ODI

Oracle’s Data Integration capabilities, cloud or otherwise have been best known as Oracle Data Integrator or ODI. The original ODI was the data equivelent of SOA Suite implementing Extract Load Transform (ELT) rather than ETL as it meant the Oracle DB was fully leveraged. This was built on the WebLogic server.

Along Came Cloud

Oracle cloud came along, and there is a natural need for ODI capabilities. Like SOA Suite, the first evolution was to provide ODI Cloud Service just like SOA Suite had SOA Cloud Service. Both are essentially the same on-premises product with UIs to manage deployment and configuration.

ODI’s cloud transformation for the cloud lead ODI CS evolving into DIPC (Data Integration Platform Cloud). Very much an evolution, but with a more web centered experience for designing the integrations. However, DIPC is no longer available (except possible to customers already using it).

Whilst DIPC had been evolving the requirement to continue with on-premises ODI capabilities is needed. Whilst we don’t know for sure, we can speculate that there was divergent development happening creating overhead as ODI as an on-prem solution remained. We then saw the arrival of ODI Marketplace, this provides an easier transition, including taking into account licensing considerations. DIPC has been superseded by ODI Marketplace.

Marketplace

Oracle has developed a Marketplace just like the other major players so that 3rd party vendors could offer their technologies on the Oracle cloud, just as you can with Azure and AWS. But Oracle have also exploited it to offer their traditional products normally associated with on-premise deployments in the cloud. As a result we saw ODI Marketplace. A smart move as it offers the possibility of exploiting on-prem licensing into the cloud along with portability.

So far the ODI capabilities in its different forms continued to leverage its WebLogic foundations. But by this time the Gen2 Oracle Cloud and the organizational structures behind it has been well established, and working up the value stack. Those products in the middleware space have been impacted by both the technology strategies and organization. As a result API for example have been aligned to the OCI native space, but Integration Cloud has been moved towards the Apps space. in many respects this reflects a low code vs code native model.

OCI ODI

Earlier this year (2020) Oracle launched a brand new ODI product, to use its full name Oracle Cloud Infrastructure Data Integration. This is an OCI native (i.e. Gen2 solution leveraging microservices technologies).

This new product appears to be a very much ground up build as it exploits Apache Spark and Function as a Service (FaaS) as foundational elements. As a ground up build, it doesn’t inherit all the adapters the original ODI can offer. This does mean as a solution today it is very focused on some specific needs around supporting the data movement between the various Oracle Cloud storage and Database as a Service solutions rather than general ingestion and extraction processes.

Conclusion

Products are evolving, but the direction of travel appears to be resolving. But we are still in that period where there are capability gaps between the Gen2 native solution and the traditional ODI via Marketplace solution. As a result the question becomes less which product, but when and if I have to invest in using ODI Marketplace how to migrate when the native product catches up.