linux

martin.bach's picture

Introducing Packer: building Vagrant base boxes hands-free

I have referred to Packer in some of my cloud-related presentations as an example of a tool for creating immutable infrastructure. In addition to the cloud, Packer supports a great many other build targets as well. Since I work with VirtualBox and Vagrant a lot, Packer’s ability to create Vagrant base boxes is super awesome. Combined with local box versioning I can build new Vagrant systems in almost no time. More importantly though, I can simply kick the process off, grab a coffee, and when I’m back, enjoy a new build of my Oracle Linux Vagrant base box.

fritshoogland's picture

Using Grafana Loki to be able to search and view all logs

This post is about how to make your log files being aggregated in a single place and easy searchable via a convenient web interface.

martin.bach's picture

Using wallets with dbca in Oracle 19c

One of the features I haven’t seen blogged about is the option to provide SYS and SYSTEM passwords (among other parameters) to dbca via a wallet. This is documented in chapter 2 of the Database Administration Guide 19c.

[oracle@server1 ~]$ dbca -silent -createDatabase -help
...
        [-useWalletForDBCredentials  Specify true to load database credentials from wallet]
            -dbCredentialsWalletLocation 
...

I was curious how to use this feature as it might provide slightly better security when deploying new databases via dbca. It turned out it wasn’t too hard in the end, and I decided to briefly put my efforts into this short article.

martin.bach's picture

Installing Virtualbox Guest Additions for Oracle Linux 8.2

Since I can never remember how to install Virtualbox Guest Additions I thought I’d write it down. Maybe it’ll save you a few minutes; I know it will save me a lot of time ;)

For this post I used the latest versions at the time of writing:

  • Virtualbox 6.1.10 for Linux (my host is running Ubuntu 20.04 LTS)
  • Oracle Linux 8.2 (V996906-01.iso)

The VM was installed using the “minimal-environment” group and booted into UEK 6. I believe this change came with Oracle Linux (OL) 8.2 and I seem to remember OL 8.1 used the Red Hat Compatible Kernel (RHCK) by default. There’s nothing wrong with that of course, it’s just an observation. I am going to stick with UEK 6 in my lab, instructions are different from using RHCK.

Franck Pachot's picture

Oracle Autonomous Linux: cron’d ksplice and yum updates

By Franck Pachot

.
Oracle Enterprise Linux (OEL) is a Linux distribution which is binary compatible with Red Hat Enterprise Linux (RHEL). However, unlike RHEL, OEL is open source, free to download, free to use, free to distribute, free to update and gets free bug fixes. And there are more frequent updates in OEL than in CentOS, the free base of RHEL. You can pay a subscription for additional support and features (like Ksplice or Dtrace) in OEL. It can run the same kernel as RHEL but also provides, still for free, the ‘unbreakable kernel’ (UEK) which is still compatible with RHEL but enhanced with optimizations, recommended especially when running Oracle products.

martin.bach's picture

Copying a SQL Plan Baseline from one database to another

Hopefully this post saves you a few minutes looking the procedure up. I know it’ll save me some time ;) In this rather lengthy article I’d like to cover how I copied a SQL Plan Baseline from one database to another. If you find this procedure useful, please ensure your system is appropriately licensed for it and test it first!

My Setup

My source database is named ORA19NCDB, patched to 19.7.0 running on Oracle Linux 7x/UEK 5. As I do so often, I’m using Dominic Giles’s Swingbench as the source for this experiment. This is the query in question:

oraclebase's picture

Video : Using Podman With Existing Dockerfiles (Oracle Database and ORDS)

Today’s video shows me using some of my existing Docker builds with Podman. Specifically a 19c database container and an Oracle REST Data Services (ORDS) container.

For those with an understanding of Docker, it should look really familiar, but it does introduce a twist in the form of a pod.

The video is based on this article.

You can see more information about containers here.

oraclebase's picture

Video : Install Podman on Oracle Linux 8 (OL8)

In today’s video we’ll take a look at installing Podman on Oracle Linux 8 (OL8).

This is based on the article here.

You can see more information about containers here.

oraclebase's picture

Oracle Database 19c on Fedora 32

https://oracle-base.com/blog/wp-content/uploads/2020/05/f32-final-816x34... 300w, https://oracle-base.com/blog/wp-content/uploads/2020/05/f32-final-816x34... 768w" sizes="(max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 61vw, (max-width: 1362px) 45vw, 600px" />

Fedora 32 was released at the end of April (see here). Here comes the standard warning.

oraclebase's picture

Oracle Linux 8 (OL8) : Podman

https://oracle-base.com/blog/wp-content/uploads/2020/05/king-tut-161521_... 272w" sizes="(max-width: 197px) 85vw, 197px" />

When Oracle Linux 8 (OL8) was released, one of the first things I did was check for the Oracle supplied Docker engine. Nothing.

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