Downloading and installing Db2 Developer Community Edition on Red Hat Enterprise Linux Roger E. Sanders Yujing Ke Published on October 24, 2018 This guide will help you download and install IBM® Db2® software, Data Server Manager software, Data Studio software (optionally) and a saMple database – all packaged in a Docker container – on Red Hat Enterprise Linux. After completing the following steps, you will have a Db2 v11.1.3.3 database naMed SAMPLE that can be used to develop and test applications. Table of Contents 1 Introduction: What is Db2? ............................................................................................. 1 2 Prerequisites ................................................................................................................... 2 2.1 Hardware ............................................................................................................................. 2 2.2 Software .............................................................................................................................. 2 3 Installing Red Hat Enterprise Linux .................................................................................. 2 4 Downloading the Db2 Developer Community Edition software ....................................... 4 5 Preparing the server for Db2 installation ......................................................................... 9 5.1 Download and install Docker for Linux ................................................................................. 9 5.2 Configure the server to start Docker automatically on boot ............................................... 10 5.3 Create a Db2 instance user ................................................................................................. 11 5.4 Create a Docker group and add the Db2 user to it .............................................................. 11 6 Installing the Db2 software ............................................................................................ 12 7 Testing and validating setup .......................................................................................... 23 7.1 Querying the Db2 SAMPLE database .................................................................................. 23 8 Summary ....................................................................................................................... 29 9 References ..................................................................................................................... 29 1 Introduction: What is Db2? IBM Db2 is an enterprise-level, high-performance relational database manageMent systeM (RDBMS) that is designed to make the storage, manageMent, and retrieval of data siMple. Data is stored in the form of tables consisting of rows (records) and columns (fields) and can be retrieved or modified by any number of applications that are running concurrently. Access to, and manipulation of data in a Db2 database is accomplished using Structured Query Language (SQL) to store (INSERT), retrieve (SELECT), and manipulate (UPDATE and DELETE) data in a RDBMS. SQL also provides facilities for defining database objects like tables, indexes, and views, and for restricting data access. Docker is software that aids in the delivery and deployment of other software by bundling the required components in containers; IBM Db2 Developer ComMunity Edition is a Docker container that has everything needed to set up an environment for Db2 database application development. 2 Prerequisites • Basic understanding of Linux operating systeM concepts 2.1 Hardware • An Intel-based X86 server capable of supporting a 64-bit Operating SysteM • MiniMum of 8GB of RAM • Monitor • Keyboard • Mouse 2.2 Software • Red Hat Enterprise Linux 7.5.0 – Developers can get free Red Hat Enterprise Linux Developer subscription for development purposes by registering and downloading through developers.redhat.com • Db2 Developer Community Edition * – Free, fully functional version of Db2 intended for development, test, and sMall production environments, packaged in a Docker container. (Get information on Db2 Direct and Developer-C Editions.) A list of the most current versions of Db2 and Linux operating systems that have been tested (together) can be found at the System requirements for IBM DB2 for Linux, UNIX, and Windows web site. 3 Installing Red Hat Enterprise Linux (Duration: Up to 60 Minutes) Less-experienced users of RHEL should choose Server with GUI as the base environment as part of the “Software Selection” step of installation. You should also choose the following Add-Ons for the Selected Environment: • Hardware Monitoring Utilities • Java Platform • KDE • Performance Tools • Development Tools • Security Tools • System Administration Tools A root user account is created during installation of RHEL; note the password for this account. 4 Downloading the Db2 Developer Community Edition software (Duration: 5 minutes) Follow these steps to download the Db2 Developer ComMunity Edition software (web page appearance may vary): 1. Open a web browser and go to the IBM Db2 Direct and Developer Editions web page. (Figure 1). Figure 1. IBM Db2 Direct and Developer Editions Web Page 2. Click the Try free developer edition button. This will open the IBM Db2 Developer Editions download page (see Figure 2). Figure 2. IBM Db2 Developer Editions download page 3. Click Try free edition for IBM Db2 Developer ComMunity Edition. This will open a Sign Up for IBM Db2 web page (Figure 3). Figure 3. IBM Db2 Developer Community Edition Sign Up page 4. If you already have an IBM ID, click the Sign in link and then enter your IBM ID and password. 5. If you do not already have an IBM ID, enter the information requested, along with a password; then click Continue. 6. Answer the questions on the Complete your profile page (Figure 4) and click Continue. Figure 4. Complete your profile page 7. A Downloads page will open (Figure 5). Click the Download now link next to "IBM Db2 Developer Community Edition for Linux x86 (SUSE Linux Enterprise Server 12, Fedora 25, Ubuntu 16.04+)." Figure 5. IBM Db2 Developer Community Edition Downloads page 8. Save the resulting file (ibm-db2-developer_community_edition-1.2.1- x86_64.AppImage). You now have the software needed to install Db2 Developer ComMunity Edition on your Machine. 5 Preparing the server for Db2 installation 5.1 Download and install Docker for Linux (Duration: 10 minutes) Because Db2 Developer ComMunity Edition is Db2 (along with other tools) in a Docker container, Docker Enterprise Edition (EE) Must be installed on the server before Db2 Developer ComMunity Edition can be used. Perform the following steps to install Docker EE: 1. Open a terminal window. (Right-click anywhere on the desktop and select Open Terminal from the menu shown.) 2. Execute the comMand su - root. When the Password: prompt appears, provide the password created for the root user during installation. The comMand line prompt should change from $ to #. 3. Confirm that the systeM has been registered with the Red Hat subscription manageMent service by executing the comMand subscription-manager repos --list. If the systeM does not have any repositories available through subscriptions, use the Red Hat Subscription Manager systeM tool to register the server (ApplicationsàSystem ToolsàRed Hat Subscription Manager). 4. If a Docker repository already exists on the server, reMove it by executing the comMand rm -f /etc/yum.repos.d/docker*.repo. 5. Go to https://store.docker.com/My-content and log in to your DockerHub account. Then, navigate to your “My Content” page. (Once you have created a Docker store account, all of your subscriptions and trials are listed there; if you have not obtained a copy of Docker EE for RHEL, you will need to do so before you continue). 6. Click the Setup button for Docker Enterprise Edition for Red Hat Enterprise Linux and use the Copy and paste this URL to download your Edition button to copy the URL for the Docker EE software. 7. TeMporarily store the URL just copied in an environment variable by executing the comMand export DOCKERURL="DockerURL" where DockerURL is the URL copied in the previous step (in the terminal window). For exaMple: export DOCKERURL=”https://storebits.docker.com/ee/rhel/sub- ee10d41c-ecfa-4e03-b75f-61f8610d543f” Note: This variable assignment does not persist when the session ends. 8. Store the value of the DOCKERURL variable (assigned in the previous step), in a variable in the /etc/yum/vars/ file by executing the comMand echo "$DOCKERURL/rhel" > /etc/yum/vars/dockerurl 9. Store your RHEL Major version number in the /etc/yum/vars/dockerosversion file by executing a comMand that looks something like this, where “x” should be replaced with your major version number: echo "x" > /etc/yum/vars/dockerosversion For exaMple: echo "7" > /etc/yum/vars/dockerosversion 10. Execute the following comMands to install the prerequisite Docker packages: a) subscription-manager repos –enable rhel-7-server- optional-rpms b) yum makecache fast c) yum -y install yum-utils d) yum -y install device-mapper-persistent-data e) yum -y install lvm2 f) yum -y container-selinux 11. Enable the extras RHEL repository by executing the comMand yum-config- manager --enable rhel-7-server-extras-rpms. 12. Create a new Docker EE repository by executing the comMand yum-config- manager --add-repo "$DOCKERURL/rhel/docker-ee.repo". (Note that you only need to set up the repository once, after which you can install Docker EE and upgrade repeatedly from the