{"id":13386,"date":"2020-02-08T22:25:42","date_gmt":"2020-02-08T21:25:42","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/running-sql-server-on-the-oracle-free-tier\/"},"modified":"2023-07-17T16:37:21","modified_gmt":"2023-07-17T14:37:21","slug":"running-sql-server-on-the-oracle-free-tier","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/running-sql-server-on-the-oracle-free-tier\/","title":{"rendered":"Running SQL Server on the Oracle Free\u00a0tier"},"content":{"rendered":"<h2>By Franck Pachot<\/h2>\n<p>The Oracle Cloud is not only for Oracle Database. You can create a VM running Oracle Linux with full root access to it, even in the free tier: a free VM that will be always up, never expires, with full ssh connectivity to a sudoer user, where you are able to tunnel any port. Of course, there are some limits that I&#8217;ve detailed in a <a href=\"https:\/\/medium.com\/@FranckPachot\/the-oracle-cloud-free-tier-37c27f3b1e19?source=friends_link&amp;sk=2233caa140b1f1501ad8874f18fd2197\" target=\"_blank\" rel=\"noopener noreferrer\">previous post<\/a>. But that is sufficient to run a database, given that you configure a low memory usage. For Oracle Database XE, <a href=\"https:\/\/blog.ora-600.pl\/2019\/09\/27\/how-to-install-oracle-xe-18c-in-oracle-cloud-free-tier\/\" target=\"_blank\" rel=\"noopener noreferrer\">Kamil Stawiarski<\/a> mentions that you can just hack the memory test in the RPM shell script.<br \/>\nBut for Microsoft SQL Server, that&#8217;s a bit more complex because this test is hardcoded in the sqlservr binary and the solution I propose here is to intercept the call to the sysinfo() system call.<br \/>\n<!--more--><br \/>\nCreating a VM in the Oracle Cloud is very easy, here are the steps in one picture:<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-37075\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/oraclefreetierforsqlserver001.png\" alt=\"\" width=\"1024\" height=\"683\" \/><\/p>\n<p>I&#8217;m connecting to the public IP Address with ssh (the public key is uploaded when creating the VM) and I&#8217;ll will run everything as root:<\/p>\n<pre><code>ssh opc@129.213.138.34\nsudo su -\ncat \/etc\/oracle-release<\/code><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-37066\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Annotation-2020-02-08-172455.jpg\" alt=\"\" width=\"1024\" height=\"135\" \/><\/p>\n<p>I install docker engine (version 19.3 there)<\/p>\n<pre><code>yum install -y docker-engine<\/code><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-37065\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Annotation-2020-02-08-172733.jpg\" alt=\"\" width=\"1024\" height=\"483\" \/><\/p>\n<p>I start docker<\/p>\n<pre><code>\nsystemctl start docker\ndocker info<\/code><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-37064\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Annotation-2020-02-08-172947.jpg\" alt=\"\" width=\"1024\" height=\"697\" \/><br \/>\nI&#8217;ll use the latest SQL Server 2019 image built on RHEL<\/p>\n<pre><code>docker pull mcr.microsoft.com\/mssql\/rhel\/server:2019-latest\ndocker images<\/code><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-37063\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Annotation-2020-02-08-173411.jpg\" alt=\"\" width=\"1024\" height=\"256\" \/><\/p>\n<p>5 minutes to download a 1.5GB image. Now trying to start it.<br \/>\nThe nice thing (when I compare to Oracle) is that we don&#8217;t have to manually accept the license terms with a click-through process. I just mention that I have read and accepted them with: ACCEPT_EULA=Y<\/p>\n<p>I try to run it:<\/p>\n<pre><code>docker run \\\n -e \"ACCEPT_EULA=Y\" \\\n -e 'MSSQL_PID=Express' \\\n -p 1433:1433 \\\n -e 'SA_PASSWORD=**P455w0rd**' \\\n --name mssql \\\n mcr.microsoft.com\/mssql\/rhel\/server:2019-latest<\/code><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-37062\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Annotation-2020-02-08-173451.jpg\" alt=\"\" width=\"1024\" height=\"228\" \/><\/p>\n<p>There&#8217;s a hardcoded prerequisite verification to check that the system has at least 2000 MB of RAM. And I have less than one GB here in this free tier:<\/p>\n<pre><code>\nawk '\/^Mem\/{print $0,$2\/1024\" MB\"}' \/proc\/meminfo\n<\/code><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-37071\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Annotation-2020-02-08-174805.jpg\" alt=\"\" width=\"1024\" height=\"137\" \/><\/p>\n<p>Fortunately, there&#8217;s always a nice geek on the internet with an awesome solution: hack the sysinfo() system call with a LD_PRELOAD&#8217;ed wrapper : <a href=\"https:\/\/github.com\/justin2004\/mssql_server_tiny\" target=\"_blank\" rel=\"noopener noreferrer\">A Slightly Liberated Microsoft SQL Server Docker image<\/a><\/p>\n<p>Let&#8217;s get it:<\/p>\n<pre><code>git clone https:\/\/github.com\/justin2004\/mssql_server_tiny.git\ncd mssql_server_tiny<\/code><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-37061\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Annotation-2020-02-08-173735.jpg\" alt=\"\" width=\"1024\" height=\"769\" \/><\/p>\n<p>I changed the FROM to build from the 2019 RHEL image and I preferred to use \/etc\/ld.so.preload rather than overriding the CMD command with LD_LIBRARY:<\/p>\n<pre><code>\nFROM oraclelinux:7-slim AS build0\nWORKDIR \/root\nRUN yum update -y &amp;&amp; yum install -y binutils gcc\nADD wrapper.c \/root\/\nRUN gcc -shared  -ldl -fPIC -o wrapper.so wrapper.c\nFROM mcr.microsoft.com\/mssql\/rhel\/server:2019-latest\nCOPY --from=build0 \/root\/wrapper.so \/root\/\nADD wrapper.c \/root\/\nUSER root\nRUN echo \"\/root\/wrapper.so\" &gt; \/etc\/ld.so.preload\nUSER mssql\n<\/code><\/pre>\n<p>I didn&#8217;t change the wrapper for the sysinfo function:<\/p>\n<pre><code>#define _GNU_SOURCE\n#include \n#include \n#include\nint sysinfo(struct sysinfo *info){\n    \/\/ clear it\n    \/\/dlerror();\n    void *pt=NULL;\n    typedef int (*real_sysinfo)(struct sysinfo *info);\n    \/\/ we need the real sysinfo function address\n    pt = dlsym(RTLD_NEXT,\"sysinfo\");\n    \/\/printf(\"pt: %x\\n\", *(char *)pt);\n    \/\/ call the real sysinfo system call\n    int real_return_val=((real_sysinfo)pt)(info);\n    \/\/ but then modify its returned totalram field if necessary\n    \/\/ because sqlserver needs to believe it has \"2000 megabytes\"\n    \/\/ physical memory\n    if( info-&gt;totalram totalram = 1000l * 1000l * 1000l * 2l ;\n    }\n    return real_return_val;\n}\n<\/code><\/pre>\n<p>I build the image from there:<\/p>\n<pre><code>docker build -t mssql .<\/code><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-37070\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Annotation-2020-02-08-175629.jpg\" alt=\"\" width=\"1024\" height=\"523\" \/><br \/>\nI run it:<\/p>\n<pre><code>docker run -d \\\n -e \"ACCEPT_EULA=Y\" \\\n -e 'MSSQL_PID=Express' \\\n -p 1433:1433 \\\n -e 'SA_PASSWORD=**P455w0rd**' \\\n --name mssql \\\n mssql<\/code><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-37069\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Annotation-2020-02-08-180121-scaled.jpg\" alt=\"\" width=\"1024\" height=\"558\" \/><\/p>\n<p>I wait until it is ready:<\/p>\n<pre><code>until docker logs mssql  | grep -C10 \"Recovery is complete.\" ; do sleep 1 ; done<\/code><\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-37068\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Annotation-2020-02-08-180219.jpg\" alt=\"\" width=\"1024\" height=\"236\" \/><\/p>\n<p>All is ok and I connect and check the version:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-37067\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/Annotation-2020-02-08-180605-scaled.jpg\" alt=\"\" width=\"1024\" height=\"493\" \/><\/p>\n<p>Well&#8230; as you can see my first attempt failed. I am running with very low memory here, and then many memory allocation problems can be expected. If you look at the logs after a while, many automatic system tasks fail. But that&#8217;s sufficient for a minimal lab and you can tweak some Linux and SQL Server parameters if you need it. Comments are welcome here for feedback and ideas&#8230;<\/p>\n<p>The port 1433 is exposed here locally and it can be tunneled through ssh. This is a free lab environment always accessible from everywhere to do small tests in MS SQL, running on the Oracle free tier. Here is how I connect with <a href=\"https:\/\/dbeaver.io\/download\/\" target=\"_blank\" rel=\"noopener noreferrer\">DBeaver<\/a> from my laptop, just mentioning the public IP address, private ssh key and connection information:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-37088\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/oraclefreetierforsqlserver002-1.png\" alt=\"\" width=\"1024\" height=\"683\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>By Franck Pachot The Oracle Cloud is not only for Oracle Database. You can create a VM running Oracle Linux with full root access to it, even in the free tier: a free VM that will be always up, never expires, with full ssh connectivity to a sudoer user, where you are able to tunnel [&hellip;]<\/p>\n","protected":false},"author":27,"featured_media":13400,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[955,59,99],"tags":[135,1817,96,51],"type_dbi":[],"class_list":["post-13386","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cloud","category-oracle","category-sql-server","tag-cloud","tag-ld_preload","tag-oracle","tag-sql-server"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Running SQL Server on the Oracle Free\u00a0tier - dbi Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbi-services.com\/blog\/running-sql-server-on-the-oracle-free-tier\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Running SQL Server on the Oracle Free\u00a0tier\" \/>\n<meta property=\"og:description\" content=\"By Franck Pachot The Oracle Cloud is not only for Oracle Database. 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