pazikas.com

Tag: patching docker

  • Patching Oracle Database on Docker

    I wrote this post which details creating an Oracle 19c Database docker image.

    Following on from this post I will detail the steps required to patch and Oracle 19c Docker image. With most of my technology-related posts, they are written because I will require this information in the future so a blog post provides reference for my future self.

    Running an Oracle 19c database in docker you are not able to patch the database in a traditional sense, you cannot hop into the container and patch it with opatch you need to create a “patched” image, thankfully Oracle on their GitHub (here) provide some shell scripts to make this task easier.

    Note – You will need to have a My Oracle Support login and valid support agreement to download Oracle Database patches if you don’t have one of these your not going to get very far. Further, if you have chosen to use a “slim” Oracle database docker image you will likely run into problems, during the “sliming” down process folders are removed from the docker image that means when it comes to patching opatch will throw an error since some folders and directories don’t exist.

    Clone the Oracle Docker images to your local machine with git (if you don’t already have them)

    git clone https://github.com/oracle/docker-images.git

    In this example, we will be patching a single instance 19c database. Head down into the SingleInstance folder then samples and applypatch.

    cd ~/docker-images/OracleDatabase/SingleInstance/19.3.0/samples/applypatch

    The scripts used in this example rely on the following directory structure:

    19.3.0.0
   patches
      001 (patch directory)
         pNNNNNN_RRRRRR.zip  (patch zip file)
      002 (optional)
      00N (optional, Nth patch directory)
      p6880880*.zip (optional, OPatch zip file)

    patches: The working directory for patch installation.
    001: The directory containing the patch zip file.
    00N: The second, third, … directory containing the second, third, … patch zip file. This is useful if you want to install multiple patches at once. The script will go into each of these directories in the numbered order and apply the patches.
    Important: It is up to the user to guarantee the patch order, if any.

    Below is a working example where p31771877 is the latest 19c Critical Patch Update at the time of writing (Oct 2020) and p6880880 is the latest version of OPatch.

    With the patches in place, we can now run buildPatchedDockerImage.sh to create the “new” patched docker image

    ./buildPatchedDockerImage.sh -e -v 19.3.0 -p Oct2020
    Sorry about the change in screenshots, my Macbook changes theme based on time of day and I wrote this blog post over about 8hrs so initial screens where taken in the morning while above was taken at night when I got back to my laptop.

    It will take some time to patch the Oracle database with the patches as rebuild the docker image so go make yourself a coffee and come back in 25-30min. Once you return all going well you should be able to start your new patched docker image with the following command:

    docker run --name "oracle19.9" -p 1521:1521 -p 5500:5500 -e ORACLE_PDB=orapdb1 -e ORACLE_PWD=topsecretpass -e ORACLE_MEM=3000 -v /opt/oracle/oradata -d oracle/database:19.3.0-ee-Oct2020

    You can now login to your docker image using the below commands;

    docker exec -it oracle19.9 /bin/bash

    ps -ef |grep pmon

    . oraenv

    sqlplus / as sysdba

    If you have any questions about running Oracle Database in Docker, the process of doing or are having any problems please get in touch and I can help.

  • Oracle Database with Docker

    Running an Oracle database with Docker is a fairly simple task but I thought it would be useful to document the steps required for reference as I will likely need to refer to then in the future and to help others starting out on this path on how to run Oracle Database with Docker.

    Oracle Database with Docker

    Firstly Oracle only has 12c available via Docker Hub they had some legal grievances with each other a few years ago which means Oracle no longer updates the Docker Hub images but instead stores them here on GitHub. Another note is while the information on GitHub is great you still need to download the Oracle Database install .zip files from Oracle’s website yourself further if you plan on patching the Oracle database with docker you will need to have a valid Oracle Support licence and login to MOS.

    Firstly clone the Oracle Docker images to your local machine with git

    git clone https://github.com/oracle/docker-images.git

    After you have cloned the repo you will see there is a lot more available than just Oracle Database images but for this article its all we are concerned with, move to the OracleDatabase folder, then the SingleInstance folder and finally the 19.3.0 directory.

    cd ~/docker-images/OracleDatabase/SingleInstance/19.3.0

    With your downloaded Oracle Database install .zip copy in into your current 19.3.0 directory.

    cp $HOME/Downloads/LINUX.X64_193000_db_home.zip .

    If you plan on patching this Oracle Database with Docker in the future the default scripts remove some key directories within $ORACLE_HOME to reduce image size that will cause you to run into issues when trying to patch in the future, the fix is simple by default we choose to install the “SLIM” option we just need to update the Dockerfile within the 19.3.0 directory to read false.

    ARG SLIMMING=false

    Move back to the parent directory and run buildDockerImage.sh with a -v to specify database version in this case 19.3.0 and -e to indicate we want to use enterprise edition.

    cd ~/docker-images/OracleDatabase/SingleInstance

    ./buildDockerImage.sh -v 19.3.0 -e

    Depending on the resources you have on your machine will depend on how quickly the next part goes, I would say on average it will take 20-30min so go have coffee, you should come back to a Build Complete message. We have not successfully created an Oracle database image.

    To run the image use the following;

    docker run --name "oracle19.3" -p 1521:1521 -p 5500:5500 -e ORACLE_PDB=orapdb1 -e ORACLE_PWD=topsecretpass -e ORACLE_MEM=3000 -v /opt/oracle/oradata -d oracle/database:19.3.0-ee

    Where –name is the name of the docker image, ORACLE_PDB is the PDB name, ORACLE_PWD is the database password and ORACLE_MEM is the memory allocated to the DB. This first run of the docker image will go away and create the database so expect it to take some time during its first run.

    You can use sqldeveloper to connect to your PDB or connect to sqlplus via docker by logging directly into the docker image as per below

    docker exec -it oracle19.3 /bin/bash

    ps -ef |grep pmon

    . oraenv

    sqlplus / as sysdba

    Useful Docker commands

    Stop Docker Image

    docker container stop oracle19.3

    Start docker container

    docker container start oracle19.3

    Show running Docker containers

    docker ps

    List All Docker Images

    docker images

    Delete Docker Image

    docker image rm "image_id_here"

    And that’s all there is to it, it’s not a hard process and once you have been through it once or twice it becomes second nature. I’ve found great benefit running Oracle database with Docker, previously I had multiple Virtual machines with each database version on then now I just have Oracle database docker images that I can have running and access when I need them. If you enjoyed this article about Oracle database with Docker, please read my follow up on patching oracle database docker images here.