---
title: RheoData Blog | cloud services
description: cloud services | RheoData Blog Posts
---

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<https://rheodata.com/en-us/blog/tag/cloud-services#minimal-header__mobile-nav__mmenu>

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          - [Exadata & Oracle Database](https://rheodata.com/exadata-and-oracle-database-26ai)
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- [Customer Stories](https://rheodata.com/customer-stories) 
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    - [Shoe Carnival](https://rheodata.com/customer-stories/shoe-carnival-goldengate-microservices-migration)
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- Resources 
    - [Blog](https://rheodata.com/en-us/blog)
    - Books 
          - [Pro Oracle GoldenGate 23ai](https://rheodata.com/pro-oracle-goldengate-23ai-for-the-dba-pdf-landing-page)
- [Contact](https://rheodata.com/contact)

Posts about

# cloud services

<https://rheodata.com/en-us/blog/goldengate-service-ggs-deployment-configuration>

## [GoldenGate Service (GGS) – Deployment Configuration](https://rheodata.com/en-us/blog/goldengate-service-ggs-deployment-configuration)

Posted by [Bobby Curtis](https://rheodata.com/en-us/blog/author/bobby-curtis) | Nov 10, 2025 9:29:50 PM

### Deployments

[CONTINUE READING](https://rheodata.com/en-us/blog/goldengate-service-ggs-deployment-configuration)

<https://rheodata.com/en-us/blog/building-oci-compute-nodes-via-code>

## [Building OCI Compute Nodes via Code](https://rheodata.com/en-us/blog/building-oci-compute-nodes-via-code)

Posted by [Bobby Curtis](https://rheodata.com/en-us/blog/author/bobby-curtis) | Nov 10, 2025 9:29:43 PM

Over the last couple of posts, we’ve been showing how to use the OCI provider and upgrading the...

[CONTINUE READING](https://rheodata.com/en-us/blog/building-oci-compute-nodes-via-code)

<https://rheodata.com/en-us/blog/changing-ssh-keys-on-oci-compute-instances>

## [Changing SSH Keys on OCI Compute Instances](https://rheodata.com/en-us/blog/changing-ssh-keys-on-oci-compute-instances)

Posted by [Bobby Curtis](https://rheodata.com/en-us/blog/author/bobby-curtis) | Nov 10, 2025 9:29:30 PM

[CONTINUE READING](https://rheodata.com/en-us/blog/changing-ssh-keys-on-oci-compute-instances)

<https://rheodata.com/en-us/blog/goldengate-service-ggs-connection-setup>

## [GoldenGate Service (GGS) – Connection Setup](https://rheodata.com/en-us/blog/goldengate-service-ggs-connection-setup)

Posted by [Bobby Curtis](https://rheodata.com/en-us/blog/author/bobby-curtis) | Nov 10, 2025 9:29:00 PM

### Creating Connections

[CONTINUE READING](https://rheodata.com/en-us/blog/goldengate-service-ggs-connection-setup)

### Recent Posts

#### [Coordinated Replicats: Faster, Lower-Risk GoldenGate Loads](https://rheodata.com/en-us/blog/coordinated-replicats-initial-load)

Posted at Jun 26, 2026 11:08:13 AM

![Post Featured Image](https://rheodata.com/hubfs/Gemini_Generated_Image_509fjc509fjc509f.png)

#### [Forward Deployed Engineering: The Operating Model the Agentic Era Demands](https://rheodata.com/en-us/blog/forward-deployed-engineering-agentic-era)

Posted at May 30, 2026 11:46:34 AM

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#### [The Bowl Is Broken: A CEO's Note on Mental Health Month and Tech Team Burnout](https://rheodata.com/en-us/blog/tech-team-burnout-mental-health-month-2026)

Posted at May 12, 2026 7:23:33 AM

![Post Featured Image](https://rheodata.com/hubfs/IMG_2142.jpg)

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  "articleBody" : "Deployments Deployments are a GoldenGate concept that has been around since 2017. In many cases, it is one of the more difficult things to explain, but when it clicks the concept is great and leads to many complex architectures. For the cloud, Oracle GoldenGate (Microservices) is a great option for moving data in and out of the clouds. I could list many more and maybe I will at some point; however, that is not the point of this post. In this post, we will take a look at how to configured deployments within OCI GoldenGate Service (GGS). After navigating to the GoldenGate page within OCI, there are two locations that can be selected for creating a deployment. The first is in the middle of the page – a button called “create deployment”. The second is under the sub-menu on the left hand side, which makes it easier to access. At this point, we want to select “Deployments” from the sub-menu. After select “Deployments”, we are taken to the “Deployments” page. On this page, we can create a deployment by selecting the “Create Deployment” button. After clicking the “Create Deployment” button, a dialog will open from the right-hand side of the screen. On this dialog, we can provide the General Information for the deployment as well as GoldenGate Details that are needed. At the same time, we can make the choice on what type of licensing we want to use. If you have a support-enabled license of GoldenGate (on-premises – classic or microservices), select BYOL. If you want to use the integrated license + support, select License Included. Note: GoldenGate Service is not a free service and we need to consider what type of license we needed. Clicking Next, we are taken to the GoldenGate Details dialog for the deployment. There is a good bit of information on this screen. The first thing to notice is the “Select a technology” drop down menu. This menu contains all the different versions of GoldenGate that can be used. This includes Oracle plus a few heterogenous options. Select the technology we want to use – in this case, we are going to use Oracle. After selecting the technology we want to use, the next item down is the Version and what technologies are supported. What are displayed here will change depending on what we selected. For Oracle, we are using the latest release of the binaries (Version) and it supports a wide range of Oracle platforms on OCI as well as other clouds. Note: If we wanted to use an older package of GoldenGate – under the “Version” there is a button called “Change Version”. By clicking this button, we are presented with a dialog that has multiple version that can be selected. The last half of the deployment dialog screen, is where we will give the GoldenGate instance a name, provide the admin username and admin password. All these items correspond to details that would be provided for the ServiceManager in an on-premises configuration. The admin username and password will be used to login to the GoldenGate instance once it is up and running. With all the information need provide, we can now click the “Create” button and build the deployment. This will drop us back at the Deployment details page. Once the deployment has been created, we can now access the Console (i.e. ServiceManager page) using the “Launch console” button. With clicking the “Launch deployment” button, we are provided with a extra dialog box that provides us a URL that can be used to go directly to the console in the future. Pay attention to the informational message that is displayed. It is reminding us that the HTML page of the console can only bee accessed from a compute instance using the VCN as this deployment. Meaning that we either have to have a compute instance on the same VCN, a VPN/FastConnect configured, or an OCI Bastion to connect to the web page. Connecting to Console Since we have to have a compute node on the same VCN to access the GGS Console, we will use one of our existing compute nodes. In this case, we will connect to the compute node using VNC. After connecting to a compute node, we opened Firefox and navigated to the URL provided. With the console page open, we will use the GGS admin username and password to access the console page. Upon clicking the “Sign In” button, we are taken to the Admin Service page.",
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  "articleBody" : "Over the last couple of posts, we’ve been showing how to use the OCI provider and upgrading the associated OCI modules. In this post, we’ll show you how to use the OCI modules that were upgraded to build OCI compute node(s) through code. The node(s) that will be built are just standard Oracle Linux 7.8 node(s); there are no additional software installed on the node(s) but gives you the sense of how easy it is to build a compute node(s) on Oracle Cloud Infrastructure (OCI). In the post on how to upgrade Terraform OCI Modules (here), we showed you how to pull the modules from the Terraform Registry and then how to upgrade them. These same steps have to be performed, but we are going to go a step further in this post. This post will focus in on the module and how to use it after it has been upgraded to 0.12 format. Terraform Registry – OCI Module The OCI module that is going to reviewed is the Compute-Instance module. This module takes up-to twenty-three (23) inputs and outputs five (5) data points. Inputs – Required The inputs that are listed here are required and used to pass values to the input variables in the variables.tf file for the module. compartment_ocid – OCID where VCN/Compute-Instance will be created source_ocid – OCID of the image or a boot volume to use, depending on the value of source_type. Default source_type is “image” ssh_authorized_keys – Public SSH keys to be included in the ~/.ssh/authorized_keys file. File must be *.pub format. *.pem format doesn’t work subnet_ocids – OCIDs (one or more) of the subnets in which the instance primary VNIC is created. Must be the OCID for the public subnet is wanting public access. The optional inputs can be feed as well, but referent to the Terraform Registry for the module for these items (here). Additionally, you could update the variables.tf file with required/optional information. Base Code The Terraform Registry give you the base code that is required for this module to work, as follows: module compute-instance { source = oracle-terraform-modules/compute-instance/oci version = 2.0.1 # insert the 4 required variables here } Notice that there is comment line that says “insert the 4 required variables”. These four (4) required variables will provide the input information needed to build a base compute-instance. With the supplied variables, the base cod would look similar to this: module compute-instance { source = oracle-terraform-modules/compute-instance/oci version = 2.0.1 #Required Info compartment_ocid = ocid1.compartment.oc1..aaaaaaaade5bxtniugmwuiynso…………………qu3lzw2xybym4svyhq source_ocid = ocid1.image.oc1.iad.aaaaaaaawtb4qxiwri5z2qjeey…………………w2e2c2jevmthva ssh_authorized_keys = ~/.ssh/id_rsa.pub subnet_ocids = [ocid1.subnet.oc1.iad.aaaaaaaamlgotv3goqjfihx……………………nsvwoqhqmouda] } Notice that the required variables are taking sting values. For compartment_ocid and source_ocid, we are providing the OCID for the compartment where the node(s) plus VCN are created. The source_ocid is the OCID for the linux image that is available in the region that we are using (us-ashburn-1) (here). The information for the ssh_authorized_keys is actually the directory path + file name of the public key needing to be used. Lastly, the subnet_ocids is an list of OCIDs that are used to provide network access/IP for the node(s). In our case, the VCN-Subnet is a public subnet and will provide public IP address to access the node(s) once built. This is the bare minimum that is needed to build a compute-instance on the OCI backend using Terraform. Extending Base Code Before building any nodes, this module can be extended with the optional items. As previously mentioned, not going to spend a lot of time on the optional items for the module. In this case, though we wanted to provided a bit more details on specifics needed for the compute-instance(s). The optional items we decided to use were: instance_count – Number of instances to launch shape – The shape of the instance instance_display_name – Name of the instance By using these optional variables, we are able to specify how many node(s) to spin up, what size machines/shapes should be used, and the name of the machine that will be displayed. If we have more than one node built, then that name will be post-fixed with the instance_count for that node. The module code looks similar to this: module compute-instance { source = oracle-terraform-modules/compute-instance/oci version = 2.0.1 #Required Info compartment_ocid = ocid1.compartment.oc1..aaaaaaaade5bxtniugmwuiynso…………………qu3lzw2xybym4svyhq source_ocid = ocid1.image.oc1.iad.aaaaaaaawtb4qxiwri5z2qjeey…………………w2e2c2jevmthva ssh_authorized_keys = ~/.ssh/id_rsa.pub subnet_ocids = [ocid1.subnet.oc1.iad.aaaaaaaamlgotv3goqjfihx……………………nsvwoqhqmouda] #Optional Info instance_count = 1 shape = VM.Standard2.1 instance_display_name = Test-Linux } Outputs After building the node(s) we wanted to ensure that we knew the ID, private IP, and public IP of the node(s) that have been built. The compute-instance module provides these exact items as outputs. By updating our code, we can list all this information simply in an output statement. See the following code: output compute_info” { value = [ ID, module.compute-instance.instance_id, Private, module.compute-instance.private_ip, Public, module.compute-instance.public_ip ] } Notice that we are specifying this in a single return value. Once the node(s) are built, it will provide us with the OCID for the ID of the instance(s), the private IP, and the public IP for each of them. Running With the code written and ready to use, simply run the terraform files as you would any other terraform scripts. This will pull any updates needed for the module, plan the build and then apply. Once it is applied, you will see an OCI compute-instance built within OCI under Compute -&gt; Instances. Remember to make sure you select the correct compartment to see the node(s). Outputs compute_info = [ ID, [ [ ocid1.instance.oc1.iad.anuwcljsxbdlgqicurefoz4n……………….otio7ck7nbcfwiixqa, ], ], Private, [ [ “10.x.x.8, ], ], Public, [ [ “193.122.139.x, ], ], ] Summary In this post, we took a look at how to use the OCI compute-instance module for Terraform to build a compute node within OCI. After understanding what the module does it is pretty easy to build Linux machine in the OCI cloud platform. Enjoy!!!",
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  "articleBody" : "Every now and then comes the need to update your SSH keys on a server in the cloud. Wither you are doing an general update or changing out your laptop, ssh keys need to be updated. In my case, I was changing laptops from Mac to Windows (not 100% sold on M1/M2 for consulting purposes … story for another time). When I went to interact with other OCI compute nodes that were previously built with OpenSSH key, I noticed I couldn’t get a connection to the compute instances. Leading to the need for changing the SSH keys on these nodes. Now can you change keys if you cannot access the node. Oracle provides some good details on making connections via Instance Console Connections, but I didn’t find this very helpful. Cool yes, helpful not really. This lead me to come up with a bit of a different approach for changing SSH keys – use a new compute instance and change the keys. What we needed to do was the following: 1. Dig out the old laptop and retrieve the OpenSSH keys that were previously used. Just need the private key. Email this to yourself or any other means of getting it over to the Windows machine. 2. Use PuttyGen and import the private key. 3. Once the key has been imported, it needs to be exported to force a new file format. If trying to use an older format, will lead to errors and other issues. 4. One the key is saved, it needs to be uploaded to the new compute node that will handle all the updating of the keys for other compute nodes. 5. Once the old RSA key has been uploaded to the new compute node, making SSH connections to the older nodes should be simple with the following command: $ ssh –i id_rsa2 opc@ The to use can be either the public or private address for the compute node. Since we were already connected to a node within the VCN, we opted for the private address. 6. From here, we needed to add the new authorized key to the ~/.ssh/authorized_keys file. After a few trail and error process, we found that it was easier to copy the private key and “echo” it into the authorized_keys file. $ echo &gt;&gt; authorized_keys Once the authorized_keys have been updated on the compute node, update the Putty configurations for the compute instance and connect to the instance. Now, that all our instances have been updated with the correct keys, the Compute Instance that was provisioned to just change keys can be removed. Oracle provides some great information within their documentation; however, we often find them a little bit difficult to follow. Seems like some of the steps are incomplete or missing something. Leading many to figure out creative ways of getting the same items done. Hopefully, this post will help you or someone else understand how to quickly change the SSH keys on compute nodes. RheoData is a global systems integrator and disabled veteran-owned organization headquartered in Atlanta, Georgia. With operations being established in 2019, RheoData has built its business providing solutions across the enterprise landscape with architecture design/reviews, implementation, data replication, and managed services to ensure high-quality enterprise systems.",
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  "dateModified" : "10/11/2025",
  "datePublished" : "10/11/2025",
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```

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  "articleBody" : "Creating Connections In Oracle GoldenGate (on-premises) we always have to setup a connection to the database. This is done by using the credential store to house the connection and then testing it. What happens when we move this concept to OCI and the GoldenGate Service (GGS)? The concept of the credential store is still there; however, in GGS it is listed under or considered a “Connection”. Setup a Connection The “Connection” can be setup from the main page of the GoldenGate Service (GGS). It is listed under the “GoldenGate” Sub-menu: This will bring you to the “Connections” page. From here there is a “Create Connection” button. By clicking on the “Create Connection” button, a dialog box opens up from the right-hand side of the screen. This is the details screen where we can provide general information and connection details for making the connection to a database. In the dialog box, provide the general details and select the type of data source that the connection is used for. In this case, we will be connecting to an Oracle Database for this connection. With selecting an Oracle Database and clicking the Next button, we are taken over to “Connection Details”. On this screen, we are presented with two radio buttons that allow us to determine how to connect to an Oracle Database. If we select the “Select database” option, we can select a database that is running in OCI. Or we can select “Enter Database Information”, this option we have to know exactly how we want to connect to the database – think of using a TNSName entry in this case. To simplify this approach and since we are OCI based, we are going to “Select database” option. Notice that connection details are populated for us. All we needed to provide is the database user that we want to connect to. In this case, we are using a “common user” of C##GGATE (above). After which we can click “create”. After clicking “Create”, notice that we are taken to the “Connections Detail” screen. This screen is setting up the connection. Adding Deployment After the connection is created, we can then assign the connection to a “Deployment”. This is done by using the “Assign Deployment” button that is on the Connections page. .By clicking the “Assign Deployment” button, you will be presented with a dialog that comes up in the middle of the page. This dialog box will allow you to select the GGS deployment that the connection is to be assigned to. In this case, we only have one deployment – Atlanta. Testing Connection With the deployment assigned, we can now test the connection. This is done by using the elipsis at the end of the table and selecting “Test Connection”. If everything is correct, i.e password, for the user, a successful connection should be established. A successful connection will look like this:",
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  "dateModified" : "10/11/2025",
  "datePublished" : "10/11/2025",
  "headline" : "GoldenGate Service (GGS) – Connection Setup",
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```