{"id":34441,"date":"2024-07-30T22:53:50","date_gmt":"2024-07-30T20:53:50","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/?p=34441"},"modified":"2024-07-30T22:53:53","modified_gmt":"2024-07-30T20:53:53","slug":"issue-running-dynamic-scaling-on-hardened-system","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/issue-running-dynamic-scaling-on-hardened-system\/","title":{"rendered":"Issue running Dynamic Scaling on hardened system"},"content":{"rendered":"\n<p>During my Dynamic Scaling tests, you might have seen my other blog on same subject, I faced one issue where Dynamic Scaling could not be started properly due to hardened configuration. In this blog I would like to share my investigation and solution on this subject.<\/p>\n\n\n<a class=\"wp-block-read-more\" href=\"https:\/\/www.dbi-services.com\/blog\/issue-running-dynamic-scaling-on-hardened-system\/\" target=\"_self\">Read more<span class=\"screen-reader-text\">: Issue running Dynamic Scaling on hardened system<\/span><\/a>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-problem-description\">Problem description<\/h2>\n\n\n\n<p>I have installed Dynamic Scaling package and remote plug-in on a Red Hat VM, in the intention to be used as remote master vm for Dynamic Scaling.<\/p>\n\n\n\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1,4,9]\">\n[root@dynscal-vm ~]# cat \/etc\/redhat-release\nRed Hat Enterprise Linux release 8.9 (Ootpa)\n\n[root@dynscal-vm dynamscaling-rpm]# rpm -i dynamicscaling-2.0.2-3.el8.x86_64.rpm\nwarning: dynamicscaling-2.0.2-3.el8.x86_64.rpm: Header V4 RSA\/SHA256 Signature, key ID c9c430a5: NOKEY\n\ndynamicscaling-2.0.2.3 binary has been installed on \/opt\/dynamicscaling succesfully!\n\n[root@dynscal-vm dynamscaling-rpm]# rpm -i dynamicscaling-plugin-1.0.1-13.el8.x86_64.rpm\nwarning: dynamicscaling-plugin-1.0.1-13.el8.x86_64.rpm: Header V4 RSA\/SHA256 Signature, key ID c9c430a5: NOKEY\n\ndynamicscaling-plugin-1.0.1.13 binary has been installed on \/opt\/dynamicscaling-plugin succesfully!\n<\/pre>\n<\/br>\n\n\n\n<p>I have been installing other required package.<\/p>\n\n\n\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1]\">\n[root@dynscal-vm yum.repos.d]# dnf install glibc-langpack-en\n<\/pre>\n<\/br>\n\n\n\n<p>And then I tried to start manually Dynamic Scaling daemon.<\/p>\n\n\n\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1,2]\">\n[root@dynscal-vm ~]# cd \/opt\/dynamicscaling\n[root@dynscal-vm dynamicscaling]# .\/dynamicscaling.bin status\n[root@dynscal-vm dynamicscaling]#\n<\/pre>\n<\/br>\n\n\n\n<p>Which did not work. Same can be seen when displaying the status.<\/p>\n\n\n\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1]\">\n[root@dynscal-vm ~]# \/opt\/dynamicscaling\/dynamicscaling.bin status\n\n\u2502\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2502\n Dynamicscaling for ExaCC &amp; ExaCS - Version: 2.0.2-03\n Copyright (c) 2020-2024 Oracle and\/or its affiliates.\n----------------------------------------------------------\n Author: Ruggero Citton \n RAC Pack, Cloud Innovation and Solution Engineering Team\n\u2502\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2502\n\nDynamicscaling is not running\n<\/pre>\n<\/br>\n\n\n\n<p>And same problem with the remote plug-in.<\/p>\n\n\n\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1,2]\">\n[root@dynscal-vm dynamicscaling-plugin]# \/opt\/dynamicscaling-plugin\/dynamicscaling-plugin.bin --ocicli \\\n&gt; --vm-cluster-id ocid1.vmcluster.oc1.eu-zurich-1.an5h****************************************************47na \\\n&gt; --ssh-user opc \\\n&gt; --ociprofile DEFAULT \\\n&gt; --opcsshkey ~\/.oci\/baloise_exacc_dbaas_automation.pem\n[root@dynscal-vm dynamicscaling-plugin]# \/opt\/dynamicscaling-plugin\/dynamicscaling-plugin.bin --ocicli \\\n&gt; --vm-cluster-id ocid1.vmcluster.oc1.eu-zurich-1.an5h****************************************************47na \\\n&gt; --ssh-user opc \\\n&gt; --ociprofile DEFAULT \\\n&gt; --opcsshkey ~\/.ssh\/oci_exacc_vmcluster_opc \\\n&gt; --nosilent\n[root@dynscal-vm dynamicscaling-plugin]# \n<\/pre>\n<\/br>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-troubleshooting\">Troubleshooting<\/h2>\n\n\n\n<p>I ran a strace.<\/p>\n\n\n\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1]\">\n[root@dynscal-vm dynamscaling-rpm]# strace -o Redhat_strace_DynScal_status.txt \/opt\/dynamicscaling\/dynamicscaling.bin status\n<\/pre>\n<\/br>\n\n\n\n<p>And could find following in the log file.<\/p>\n\n\n\n<p><code>execve(\"\/tmp\/par-726f6f74\/cache-48a43edb76f05575ffe0cb3772651416666f42b3\/dynamicscaling.bin\", [\"\/tmp\/par-726f6f74\/cache-48a43edb\"..., \"status\"], 0x55edefe570f0 \/* 24 vars *\/) = -1 EACCES (Permission denied)<\/code><\/p>\n\n\n\n<p>This is due because the OS is hardened. There is noexec permission on \/tmp. Dynamic Scaling is trying to run a file from \/tmp which is forbidden.<\/p>\n\n\n\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1]\">\n[root@dynscal-vm ~]# findmnt -l | grep noexec | grep tmp\n\/tmp                            \/dev\/mapper\/rootvg-tmp                           xfs         rw,nosuid,nodev,noexec,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota\n<\/pre>\n<\/br>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-solution\">Solution<\/h2>\n\n\n\n<p>The solution is to setup TEMP variable to another directory : <code>export TEMP=\/var\/tmp<\/code><\/p>\n\n\n\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1,2]\">\n[opc@dynscal-vm ~]$ export TEMP=\/var\/tmp\n[opc@dynscal-vm ~]$ \/opt\/dynamicscaling-plugin\/dynamicscaling-plugin.bin --ocicli \\\n&gt; --vm-cluster-id ocid1.vmcluster.oc1.eu-zurich-1.an5h****************************************************47na \\\n&gt; --ssh-user opc \\\n&gt; --ociprofile DEFAULT \\\n&gt; --opcsshkey ~\/.ssh\/oci_exacc_vmcluster_opc \\\n&gt; --logpath \/tmp \\\n&gt; --logfile test_dynamic_scaling_plugin \\\n&gt; --nosilent\n\n\u2502\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2502\n  Dynamicscaling remote plugin - Version: 1.0.1-13\n  Copyright (c) 2021-2023 Oracle and\/or its affiliates.\n----------------------------------------------------------\n  Author: Ruggero Citton \n  RAC Pack, Cloud Innovation and Solution Engineering Team\n\u2502\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2592\u2502\n\nINFO: 2024-06-17 10:06:51: dynamicscaling_plugin log file at '\/tmp\/test_dynamic_scaling_plugin.log'\nINFO: 2024-06-17 10:06:51: Getting exadata-infrastructure informations\nINFO: 2024-06-17 10:06:52: Current OCPU: 18\nINFO: 2024-06-17 10:06:52: Getting ExaCC 'public-ip' IPs list...\nINFO: 2024-06-17 10:06:53: Checking ssh nodes connectivity...\nINFO: 2024-06-17 10:06:54: Getting nodes load...\nINFO: 2024-06-17 10:06:58: Getting cluster load\nSUCCESS: 2024-06-17 10:06:58: Cluster max load is 30\n<\/pre>\n<\/br>\n","protected":false},"excerpt":{"rendered":"<p>During my Dynamic Scaling tests, you might have seen my other blog on same subject, I faced one issue where Dynamic Scaling could not be started properly due to hardened configuration. In this blog I would like to share my investigation and solution on this subject. Problem description I have installed Dynamic Scaling package and [&hellip;]<\/p>\n","protected":false},"author":48,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[59],"tags":[3412,2598,1375],"type_dbi":[],"class_list":["post-34441","post","type-post","status-publish","format-standard","hentry","category-oracle","tag-dynamic-scaling","tag-exacc-3","tag-oci"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Issue running Dynamic Scaling on hardened system - 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\/issue-running-dynamic-scaling-on-hardened-system\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Issue running Dynamic Scaling on hardened system\" \/>\n<meta property=\"og:description\" content=\"During my Dynamic Scaling tests, you might have seen my other blog on same subject, I faced one issue where Dynamic Scaling could not be started properly due to hardened configuration. In this blog I would like to share my investigation and solution on this subject. Problem description I have installed Dynamic Scaling package and [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dbi-services.com\/blog\/issue-running-dynamic-scaling-on-hardened-system\/\" \/>\n<meta property=\"og:site_name\" content=\"dbi Blog\" \/>\n<meta property=\"article:published_time\" content=\"2024-07-30T20:53:50+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-07-30T20:53:53+00:00\" \/>\n<meta name=\"author\" content=\"Marc Wagner\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Marc Wagner\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/issue-running-dynamic-scaling-on-hardened-system\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/issue-running-dynamic-scaling-on-hardened-system\/\"},\"author\":{\"name\":\"Marc Wagner\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/225d9884b8467ead9a872823acb14628\"},\"headline\":\"Issue running Dynamic Scaling on hardened system\",\"datePublished\":\"2024-07-30T20:53:50+00:00\",\"dateModified\":\"2024-07-30T20:53:53+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/issue-running-dynamic-scaling-on-hardened-system\/\"},\"wordCount\":169,\"commentCount\":0,\"keywords\":[\"Dynamic Scaling\",\"exacc\",\"OCI\"],\"articleSection\":[\"Oracle\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.dbi-services.com\/blog\/issue-running-dynamic-scaling-on-hardened-system\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/issue-running-dynamic-scaling-on-hardened-system\/\",\"url\":\"https:\/\/www.dbi-services.com\/blog\/issue-running-dynamic-scaling-on-hardened-system\/\",\"name\":\"Issue running Dynamic Scaling on hardened system - 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