{"id":16850,"date":"2021-11-18T08:58:13","date_gmt":"2021-11-18T07:58:13","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/switching-from-centos-8-to-red-hat-8\/"},"modified":"2021-11-18T08:58:13","modified_gmt":"2021-11-18T07:58:13","slug":"switching-from-centos-8-to-red-hat-8","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/switching-from-centos-8-to-red-hat-8\/","title":{"rendered":"Switching from CentOS 8 to Red Hat 8"},"content":{"rendered":"<p>We have quite a few customers still running on <a href=\"https:\/\/centos.org\/\" target=\"_blank\" rel=\"noopener\">CentOS 8<\/a> and you probably already are aware that CentOS 8 will be <a href=\"https:\/\/blog.centos.org\/2021\/11\/announcing-the-latest-release-of-centos-linux-8-2111\/?utm_source=rss&amp;utm_medium=rss&amp;utm_campaign=announcing-the-latest-release-of-centos-linux-8-2111\" target=\"_blank\" rel=\"noopener\">end of life by the end of this year<\/a>. This forces a lot of companies to either switch to an alternative or to stick with <a href=\"https:\/\/centos.org\/centos-stream\/\" target=\"_blank\" rel=\"noopener\">CentOS stream<\/a>. For most enterprise workloads CentOS stream is not a solution as it is rolling release, and if you want to keep a Red Hat compatible enterprise distribution there are the following alternatives:<\/p>\n<ul>\n<li><a href=\"https:\/\/rockylinux.org\/\" target=\"_blank\" rel=\"noopener\">Rocky Linux<\/a><\/li>\n<li><a href=\"https:\/\/almalinux.org\/\" target=\"_blank\" rel=\"noopener\">AlmaLinux<\/a><\/li>\n<li><a href=\"https:\/\/www.oracle.com\/linux\/\" target=\"_blank\" rel=\"noopener\">Oracle Linux<\/a><\/li>\n<li><a href=\"https:\/\/www.redhat.com\/en\/technologies\/linux-platforms\/enterprise-linux\" target=\"_blank\" rel=\"noopener\">Red Hat Enterprise Linux<\/a><\/li>\n<\/ul>\n<p>In this post we&#8217;ll look into how you can switch from CentOS 8 to Red Hat 8, as this is what we&#8217;re doing for one of our customers currently.<\/p>\n<p><!--more--><\/p>\n<p>I did a fresh installation of CentOS 8 which brings me to this release:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\">\n[root@centos8 ~]$ cat \/etc\/centos-release\nCentOS Linux release 8.5.2111\n<\/pre>\n<p>If you check the compatibility matrix in the <a href=\"https:\/\/access.redhat.com\/documentation\/en-us\/red_hat_enterprise_linux\/8\/html-single\/converting_from_an_rpm-based_linux_distribution_to_rhel\/index\" target=\"_blank\" rel=\"noopener\">official documentation<\/a> you&#8217;ll find this:<br \/>\n<a href=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/compatibility.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/compatibility.jpg\" alt=\"\" width=\"687\" height=\"396\" class=\"aligncenter size-full wp-image-52430\" \/><\/a><\/p>\n<p>Switching from CentOS 8.5 to Red Hat 8.5 seems not to be supported but as I do not want to downgrade we&#8217;ll try anyway. As Red Hat 8.5 was just released some days ago, I guess the documentation was not yet updated. For production systems, make sure that you check all <a href=\"https:\/\/access.redhat.com\/documentation\/en-us\/red_hat_enterprise_linux\/8\/html-single\/converting_from_an_rpm-based_linux_distribution_to_rhel\/index#proc_preparing-for-a-rhel-conversion_converting-from-a-linux-distribution-to-rhel\" target=\"_blank\" rel=\"noopener\">prerequisites<\/a> before you start.<\/p>\n<p>The first step is to install the conversion tool:<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1,5,9]\">\n[root@centos8 ~]$ curl -o \/etc\/pki\/rpm-gpg\/RPM-GPG-KEY-redhat-release https:\/\/www.redhat.com\/security\/data\/fd431d51.txt\n  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current\n                                 Dload  Upload   Total   Spent    Left  Speed\n100  1855  100  1855    0     0   3644      0 --:--:-- --:--:-- --:--:--  3644\n[root@centos8 ~]$ curl --create-dirs -o \/etc\/rhsm\/ca\/redhat-uep.pem https:\/\/ftp.redhat.com\/redhat\/convert2rhel\/redhat-uep.pem\n  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current\n                                 Dload  Upload   Total   Spent    Left  Speed\n100  7411  100  7411    0     0   4927      0  0:00:01  0:00:01 --:--:--  4924\n[root@centos8 ~]$ curl -o \/etc\/yum.repos.d\/convert2rhel.repo https:\/\/ftp.redhat.com\/redhat\/convert2rhel\/8\/convert2rhel.repo\n  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current\n                                 Dload  Upload   Total   Spent    Left  Speed\n100   247  100   247    0     0    164      0  0:00:01  0:00:01 --:--:--   164\n<\/pre>\n<p>This creates a new yum\/dnf repository definition:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\">\n[root@centos8 ~]$ cat \/etc\/yum.repos.d\/convert2rhel.repo\n[convert2rhel-for-rhel-8-rpms]\nname=Convert2RHEL for OS 8\nbaseurl=https:\/\/cdn.redhat.com\/content\/public\/convert2rhel\/8\/x86_64\/os\/\nenabled=1\ngpgcheck=1\nsslcacert=\/etc\/rhsm\/ca\/redhat-uep.pem\ngpgkey=file:\/\/\/etc\/pki\/rpm-gpg\/RPM-GPG-KEY-redhat-release\n<\/pre>\n<p>&#8230; and now the conversion tool can be installed:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\">\n[root@centos8 ~]$ yum -y install convert2rhel\nConvert2RHEL for OS 8                                                                                                                                                                                                                         6.5 kB\/s | 3.9 kB     00:00    \nDependencies resolved.\n==============================================================================================================================================================================================================================================================================\n Package                                                  Architecture                                       Version                                                                           Repository                                                                Size\n==============================================================================================================================================================================================================================================================================\nInstalling:\n convert2rhel                                             noarch                                             0.24-2.el8                                                                        convert2rhel-for-rhel-8-rpms                                             130 k\nInstalling dependencies:\n python3-pip                                              noarch                                             9.0.3-20.el8                                                                      appstream                                                                 20 k\n python36                                                 x86_64                                             3.6.8-38.module_el8.5.0+895+a459eca8                                              appstream                                                                 19 k\n yum-utils                                                noarch                                             4.0.21-3.el8                                                                      baseos                                                                    73 k\nEnabling module streams:\n python36                                                                                                    3.6                                                                                                                                                             \n\nTransaction Summary\n==============================================================================================================================================================================================================================================================================\nInstall  4 Packages\n\nTotal download size: 242 k\nInstalled size: 413 k\nDownloading Packages:\n(1\/4): python36-3.6.8-38.module_el8.5.0+895+a459eca8.x86_64.rpm                                                                                                                                                                               125 kB\/s |  19 kB     00:00    \n(2\/4): yum-utils-4.0.21-3.el8.noarch.rpm                                                                                                                                                                                                      431 kB\/s |  73 kB     00:00    \n(3\/4): python3-pip-9.0.3-20.el8.noarch.rpm                                                                                                                                                                                                    107 kB\/s |  20 kB     00:00    \n(4\/4): convert2rhel-0.24-2.el8.noarch.rpm                                                                                                                                                                                                     440 kB\/s | 130 kB     00:00    \n------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------\nTotal                                                                                                                                                                                                                                         217 kB\/s | 242 kB     00:01     \nCentOS Linux 8 - AppStream                                                                                                                                                                                                                    1.6 MB\/s | 1.6 kB     00:00    \nImporting GPG key 0x8483C65D:\n Userid     : \"CentOS (CentOS Official Signing Key) \"\n Fingerprint: 99DB 70FA E1D7 CE22 7FB6 4882 05B5 55B3 8483 C65D\n From       : \/etc\/pki\/rpm-gpg\/RPM-GPG-KEY-centosofficial\nKey imported successfully\nConvert2RHEL for OS 8                                                                                                                                                                                                                         1.8 MB\/s | 1.8 kB     00:00    \nImporting GPG key 0xFD431D51:\n Userid     : \"Red Hat, Inc. (release key 2) \"\n Fingerprint: 567E 347A D004 4ADE 55BA 8A5F 199E 2F91 FD43 1D51\n From       : \/etc\/pki\/rpm-gpg\/RPM-GPG-KEY-redhat-release\nKey imported successfully\nRunning transaction check\nTransaction check succeeded.\nRunning transaction test\nTransaction test succeeded.\nRunning transaction\n  Preparing        :                                                                                                                                                                                                                                                      1\/1 \n  Installing       : python36-3.6.8-38.module_el8.5.0+895+a459eca8.x86_64                                                                                                                                                                                                 1\/4 \n  Running scriptlet: python36-3.6.8-38.module_el8.5.0+895+a459eca8.x86_64                                                                                                                                                                                                 1\/4 \n  Installing       : python3-pip-9.0.3-20.el8.noarch                                                                                                                                                                                                                      2\/4 \n  Installing       : yum-utils-4.0.21-3.el8.noarch                                                                                                                                                                                                                        3\/4 \n  Installing       : convert2rhel-0.24-2.el8.noarch                                                                                                                                                                                                                       4\/4 \n  Running scriptlet: convert2rhel-0.24-2.el8.noarch                                                                                                                                                                                                                       4\/4 \n  Verifying        : python3-pip-9.0.3-20.el8.noarch                                                                                                                                                                                                                      1\/4 \n  Verifying        : python36-3.6.8-38.module_el8.5.0+895+a459eca8.x86_64                                                                                                                                                                                                 2\/4 \n  Verifying        : yum-utils-4.0.21-3.el8.noarch                                                                                                                                                                                                                        3\/4 \n  Verifying        : convert2rhel-0.24-2.el8.noarch                                                                                                                                                                                                                       4\/4 \n\nInstalled:\n  convert2rhel-0.24-2.el8.noarch                               python3-pip-9.0.3-20.el8.noarch                               python36-3.6.8-38.module_el8.5.0+895+a459eca8.x86_64                               yum-utils-4.0.21-3.el8.noarch                              \n\nComplete!\n<\/pre>\n<p>For actually converting the system to Red Hat Enterprise Linux you need access to the Red Hat portal and an active subscription you can attach to the system:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\">\n[root@centos8 ~]$ convert2rhel --username [username] --password [password]\n<\/pre>\n<p>The first output you&#8217;ll see is the license agreement:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\">\n[11\/18\/2021 03:22:53] TASK - [Prepare: Show Red Hat software EULA] ******************************\nThe following text is a copy of the November 18, 2019 version of Red Hat GPLv2-Based End User License Agreement (EULA) [1].\nFor up-to-date version of the EULA, visit [2].\n[1] https:\/\/www.redhat.com\/licenses\/Red_Hat_GPLv2-Based_EULA_20191118.pdf\n[2] https:\/\/www.redhat.com\/en\/about\/agreements\n\nEND USER LICENSE AGREEMENT\nRED HAT GPLv2-BASED\n...\n<\/pre>\n<p>Before you proceed, make sure that all the checks\/tasks are successful, e.g.:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\">\n[11\/18\/2021 03:23:16] TASK - [Prepare: Checking the firmware interface type (BIOS\/UEFI)] ********\nBIOS detected.\n\n[11\/18\/2021 03:23:16] TASK - [Prepare: Checking \/mnt and \/sys are read-write] *******************\nRead-only \/mnt or \/sys mount points not detected.\n\n[11\/18\/2021 03:23:16] TASK - [Prepare: Check kernel compatibility with RHEL] ********************\nKernel is compatible with RHEL\n\n[11\/18\/2021 03:23:16] TASK - [Prepare: Checking if --enablerepo repositories are accessible] ****\nSkipping the check of repositories due to the use of RHSM for the conversion.\n<\/pre>\n<p>Also note the packages that will be removed, maybe you need to re-install them after the conversion:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\">\nWARNING - The following packages will be removed...\nPackage                               Vendor\/Packager  Repository\n-------                               ---------------  ----------\ncentos-logos-85.8-2.el8.x86_64        CentOS           @baseos\ncentos-logos-httpd-85.8-2.el8.noarch  CentOS           @baseos\ncentos-gpg-keys-8-3.el8.noarch        CentOS           @baseos\n<\/pre>\n<p>Once you are sure to proceed:<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1]\">\nContinue with the system conversion? [y\/n]: y\n\nBacking up centos-logos-85.8-2.el8.x86_64\nSuccessfully downloaded the centos-logos-85.8-2.el8.x86_64 package.\nBacking up centos-logos-httpd-85.8-2.el8.noarch\nSuccessfully downloaded the centos-logos-httpd-85.8-2.el8.noarch package.\nBacking up centos-gpg-keys-8-3.el8.noarch\nSuccessfully downloaded the centos-gpg-keys-8-3.el8.noarch package.\nRemoving package: centos-logos-85.8-2.el8.x86_64\nRemoving package: centos-logos-httpd-85.8-2.el8.noarch\nRemoving package: centos-gpg-keys-8-3.el8.noarch\n...\n<\/pre>\n<p>Again, double check that all the tasks\/checks are fine, e.g.:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\">\n[11\/18\/2021 03:26:15] TASK - [Convert: Resolve possible edge cases] *****************************\nChecking if java-1.7.0-openjdk is installed.\njava-1.7.0-openjdk not installed.\nRemoving shim-x64 package yum protection.\nRelevant to Oracle Linux 7 only. Skipping.\n\n[11\/18\/2021 03:26:15] TASK - [Convert: Subscription Manager - Download packages] ****************\nSuccessfully downloaded the subscription-manager package.\nSuccessfully downloaded the subscription-manager-rhsm-certificates package.\nSuccessfully downloaded the python3-subscription-manager-rhsm package.\nSuccessfully downloaded the dnf-plugin-subscription-manager package.\nSuccessfully downloaded the python3-syspurpose package.\n...\n<\/pre>\n<p>Finally select the subscription you want to attach to the system:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\">\nEnter number of the chosen subscription: 11\n\nAttaching subscription with pool ID xxxx to the system ...\nSuccessfully attached a subscription for: Red Hat Enterprise Linux, Standard Support (128 Sockets, NFR, Partner Only)\n\n[11\/18\/2021 03:30:42] TASK - [Convert: Get RHEL repository IDs] *********************************\nRHEL repository IDs to enable: rhel-8-for-x86_64-baseos-rpms, rhel-8-for-x86_64-appstream-rpms\n\n[11\/18\/2021 03:30:42] TASK - [Convert: Subscription Manager - Check required repositories] ******\nVerifying needed RHEL repositories are available ... \nRepositories available through RHSM:\n...\nNeeded RHEL repos are available.\n\n[11\/18\/2021 03:31:13] TASK - [Convert: Subscription Manager - Disable all repositories] *********\nRepositories disabled.\n\n[11\/18\/2021 03:31:58] TASK - [Convert: Remove packages containing repofiles] ********************\nSearching for packages containing repofiles or affecting variables in the repofiles:\n\ncentos-release* ................................. 0\ncentos-repos .................................... 0\ncentos-linux-repos .............................. 1\ncentos-stream-repos ............................. 0\ncentos-linux-release ............................ 1\ncentos-stream-release ........................... 0\n\n\nWARNING - The following packages will be removed...\nPackage                                     Vendor\/Packager  Repository\n-------                                     ---------------  ----------\ncentos-linux-repos-8-3.el8.noarch           CentOS           @baseos\ncentos-linux-release-8.5-1.2111.el8.noarch  CentOS           @baseos\n\n\nContinue with the system conversion? [y\/n]: y\n\n\nBacking up centos-linux-repos-8-3.el8.noarch\nSuccessfully downloaded the centos-linux-repos-8-3.el8.noarch package.\nBacking up centos-linux-release-8.5-1.2111.el8.noarch\nSuccessfully downloaded the centos-linux-release-8.5-1.2111.el8.noarch package.\nRemoving package: centos-linux-repos-8-3.el8.noarch\nRemoving package: centos-linux-release-8.5-1.2111.el8.noarch\n\n[11\/18\/2021 03:33:20] TASK - [Convert: Subscription Manager - Enable RHEL repositories] *********\nRepositories enabled through subscription-manager\n\n[11\/18\/2021 03:33:58] TASK - [Convert: Final system checks before main conversion] **************\nComparing the loaded kernel modules with the modules available in the following RHEL kernel packages available in the enabled repositories:\n kernel-core-0:4.18.0-348.2.1.el8_5.x86_64\n kernel-debug-core-0:4.18.0-348.2.1.el8_5.x86_64\n kernel-debug-modules-0:4.18.0-348.2.1.el8_5.x86_64\n kernel-debug-modules-extra-0:4.18.0-348.2.1.el8_5.x86_64\n kernel-modules-0:4.18.0-348.2.1.el8_5.x86_64\n kernel-modules-extra-0:4.18.0-348.2.1.el8_5.x86_64\n kmod-kvdo-0:6.2.5.72-81.el8.x86_64\n kmod-redhat-atlantic-0:4.18.0_255.el8_dup8.3-1.el8_3.x86_64\n kmod-redhat-bnxt_en-0:1.10.0_dup8.1-2.el8_1.x86_64\n kmod-redhat-btusb-0:0.8_4.18.0_80.23_dup8.0-4.el8_0.x86_64\n kmod-redhat-ice-0:0.8.2_k_dup8.2-1.el8_2.x86_64\n kmod-redhat-ionic-0:4.18.0.210_dup8.2-2.el8_2.x86_64\n kmod-redhat-iwlwifi-0:4.18.0_107_dup8.0-5.el8_0.x86_64\n kmod-redhat-mlx5_core-0:5.0_0_dup8.2-2.el8_2.x86_64\n kmod-redhat-mpt3sas-0:35.101.00.00_dup8.3-1.el8_3.x86_64\n kmod-redhat-oracleasm-8:2.0.8-12.el8.x86_64\n kmod-redhat-oracleasm-kernel_4_18_0_240-8:2.0.8-1.3.el8_3.x86_64\n kmod-redhat-oracleasm-kernel_4_18_0_240_14_1-8:2.0.8-1.3.el8_3.x86_64\nWARNING - ********************************************************\nWARNING - The tool allows rollback of any action until this point.\nWARNING - By continuing all further changes on the system will need to be reverted manually by the user, if necessary.\nWARNING - ********************************************************\n\nContinue with the system conversion? [y\/n]: \n<\/pre>\n<p>Up until now you can rollback any changes, so please check all the output carefully before you continue from here. The following step will take some time as a lot of packages will be updated\/replaced:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\">\nContinue with the system conversion? [y\/n]: y\n\n\n\n[11\/18\/2021 03:36:16] TASK - [Convert: Import Red Hat GPG keys] *********************************\nGPG keys imported.\nGPG keys imported.\n\n[11\/18\/2021 03:36:16] TASK - [Convert: Prepare kernel] ******************************************\nInstalling RHEL kernel ...\nUpdating Subscription Management repositories.\nLast metadata expiration check: 0:02:03 ago on Thu Nov 18 03:34:16 2021.\nPackage kernel-4.18.0-348.2.1.el8_5.x86_64 is already installed.\nDependencies resolved.\nNothing to do.\nComplete!\n\nConflict of kernels: One of the installed kernels has the same version as the latest RHEL kernel.\nUpdating Subscription Management repositories.\nLast metadata expiration check: 0:02:12 ago on Thu Nov 18 03:34:16 2021.\nDependencies resolved.\n================================================================================\n Package         Arch    Version           Repository                      Size\n================================================================================\nInstalling:\n kernel          x86_64  4.18.0-348.el8    rhel-8-for-x86_64-baseos-rpms  7.0 M\nInstalling dependencies:\n kernel-core     x86_64  4.18.0-348.el8    rhel-8-for-x86_64-baseos-rpms   38 M\n kernel-modules  x86_64  4.18.0-348.el8    rhel-8-for-x86_64-baseos-rpms   30 M\n...\n[11\/18\/2021 03:39:56] TASK - [Convert: Replace packages] ****************************************\nPerforming update of the CentOS Linux packages ...\nUpdating Subscription Management repositories.\nLast metadata expiration check: 0:05:46 ago on Thu Nov 18 03:34:16 2021.\nDependencies resolved.\n========================================================================================================================\n Package                       Arch    Version                                   Repository                         Size\n========================================================================================================================\nUpgrading:\n buildah                       x86_64  1.22.3-2.module+el8.5.0+12582+56d94c81    rhel-8-for-x86_64-appstream-rpms  7.7 M\n cockpit-podman                noarch  33-1.module+el8.5.0+12582+56d94c81        rhel-8-for-x86_64-appstream-rpms  437 k\n conmon                        x86_64  2:2.0.29-1.module+el8.5.0+12582+56d94c81  rhel-8-for-x86_64-appstream-rpms   52 k\n container-selinux             noarch  2:2.167.0-1.module+el8.5.0+12582+56d94c81 rhel-8-for-x86_64-appstream-rpms   54 k\n containernetworking-plugins   x86_64  1.0.0-1.module+el8.5.0+12582+56d94c81     rhel-8-for-x86_64-appstream-rpms   19 M\n containers-common             noarch  2:1-2.module+el8.5.0+12582+56d94c81       rhel-8-for-x86_64-appstream-rpms   77 k\n criu                          x86_64  3.15-3.module+el8.5.0+12582+56d94c81      rhel-8-for-x86_64-appstream-rpms  518 k\n...\nPerforming reinstallation of the CentOS Linux packages ...\nUpdating Subscription Management repositories.\nLast metadata expiration check: 0:06:46 ago on Thu Nov 18 03:34:16 2021.\nDependencies resolved.\n=========================================================================================================================\n Package                                Arch    Version                           Repository                         Size\n=========================================================================================================================\nReinstalling:\n NetworkManager                         x86_64  1:1.32.10-4.el8                   rhel-8-for-x86_64-baseos-rpms     2.6 M\n NetworkManager-config-server           noarch  1:1.32.10-4.el8                   rhel-8-for-x86_64-baseos-rpms     131 k\n NetworkManager-libnm                   x86_64  1:1.32.10-4.el8                   rhel-8-for-x86_64-baseos-rpms     1.8 M\n NetworkManager-libreswan               x86_64  1.2.10-4.el8                      rhel-8-for-x86_64-appstream-rpms  120 k\n NetworkManager-team                    x86_64  1:1.32.10-4.el8                   rhel-8-for-x86_64-baseos-rpms     149 k\n NetworkManager-tui                     x86_64  1:1.32.10-4.el8                   rhel-8-for-x86_64-baseos-rpms     336 k\n PackageKit                             x86_64  1.1.12-6.el8                      rhel-8-for-x86_64-appstream-rpms  599 k\n PackageKit-glib                        x86_64  1.1.12-6.el8                      rhel-8-for-x86_64-appstream-rpms  140 k\n abattis-cantarell-fonts                noarch  0.0.25-6.el8                      rhel-8-for-x86_64-appstream-rpms  156 k\n...\nDependencies resolved.\nNothing to do.\nComplete!\nReceived return code: 0\n\n\n[11\/18\/2021 03:52:35] TASK - [Convert: List remaining non-Red Hat packages] *********************\nListing packages not signed by Red Hat\nAll packages are now signed by Red Hat.\n\n[11\/18\/2021 03:52:37] TASK - [Convert: Configure the bootloader] ********************************\nBIOS detected. Nothing to do.\n\n[11\/18\/2021 03:52:37] TASK - [Convert: Patch yum configuration file] ****************************\nSkipping patching, yum configuration file not modified\n\n[11\/18\/2021 03:52:37] TASK - [Final: rpm files modified by the conversion] **********************\nRunning the 'rpm -Va' command which can take several minutes. It can be disabled by using the --no-rpm-va option.\n\nRunning the 'rpm -Va' command which can take several minutes. It can be disabled by using the --no-rpm-va option.\nThe 'rpm -Va' output has been stored in the \/var\/log\/convert2rhel\/rpm_va_after_conversion.log file\nComparison of modified rpm files from before and after the conversion:\n--- \/var\/log\/convert2rhel\/rpm_va.log\n+++ \/var\/log\/convert2rhel\/rpm_va_after_conversion.log\n@@ -0,0 +1,2 @@\n+....L....  c \/etc\/nsswitch.conf\n+.M.......  g \/var\/lib\/plymouth\/boot-duration\n@@ -2,2 +3,0 @@\n-.M.......  g \/var\/lib\/plymouth\/boot-duration\n-....L....  c \/etc\/nsswitch.conf\n@@ -9,2 +8,0 @@\n-.......T.  c \/etc\/selinux\/targeted\/contexts\/customizable_types\n-.......T.    \/etc\/pki\/rpm-gpg\/RPM-GPG-KEY-redhat-release\n\n[11\/18\/2021 03:53:03] TASK - [Final: Remove temporary folder \/var\/lib\/convert2rhel\/] ************\nTemporary folder \/var\/lib\/convert2rhel\/ removed\n\nConversion successful!\n\nWARNING - In order to boot the RHEL kernel, restart of the system is needed.\n<\/pre>\n<p>Time to reboot and check if all is fine:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1\">\n[root@centos8 ~]$ systemctl reboot\n[root@centos8 ~]$ Connection to 192.168.100.243 closed by remote host.\nConnection to 192.168.100.243 closed.\ndwe@ltdwe:~$ ssh root@192.168.100.243\nroot@192.168.100.243's password: \nActivate the web console with: systemctl enable --now cockpit.socket\n\nLast login: Thu Nov 18 02:38:37 2021 from 192.168.100.1\n[root@centos8 ~]$ cat \/etc\/os-release \nNAME=\"Red Hat Enterprise Linux\"\nVERSION=\"8.5 (Ootpa)\"\nID=\"rhel\"\nID_LIKE=\"fedora\"\nVERSION_ID=\"8.5\"\nPLATFORM_ID=\"platform:el8\"\nPRETTY_NAME=\"Red Hat Enterprise Linux 8.5 (Ootpa)\"\nANSI_COLOR=\"0;31\"\nCPE_NAME=\"cpe:\/o:redhat:enterprise_linux:8::baseos\"\nHOME_URL=\"https:\/\/www.redhat.com\/\"\nDOCUMENTATION_URL=\"https:\/\/access.redhat.com\/documentation\/red_hat_enterprise_linux\/8\/\"\nBUG_REPORT_URL=\"https:\/\/bugzilla.redhat.com\/\"\n\nREDHAT_BUGZILLA_PRODUCT=\"Red Hat Enterprise Linux 8\"\nREDHAT_BUGZILLA_PRODUCT_VERSION=8.5\nREDHAT_SUPPORT_PRODUCT=\"Red Hat Enterprise Linux\"\nREDHAT_SUPPORT_PRODUCT_VERSION=\"8.5\"\n\n[root@centos8 ~]$ dnf repolist\nUpdating Subscription Management repositories.\nrepo id                                                                                                                    repo name\nconvert2rhel-for-rhel-8-rpms                                                                                               Convert2RHEL for OS 8\nrhel-8-for-x86_64-appstream-rpms                                                                                           Red Hat Enterprise Linux 8 for x86_64 - AppStream (RPMs)\nrhel-8-for-x86_64-baseos-rpms                                                                                              Red Hat Enterprise Linux 8 for x86_64 - BaseOS (RPMs)\n\n[root@centos8 ~]$ dnf update -y\nUpdating Subscription Management repositories.\nRed Hat Enterprise Linux 8 for x86_64 - BaseOS (RPMs)                                                                                                                                                                                         3.9 MB\/s |  41 MB     00:10    \nRed Hat Enterprise Linux 8 for x86_64 - AppStream (RPMs)                                                                                                                                                                                      4.1 MB\/s |  37 MB     00:09    \nLast metadata expiration check: 0:00:03 ago on Thu 18 Nov 2021 03:55:39 AM EST.\nDependencies resolved.\nNothing to do.\nComplete!\n<\/pre>\n<p>Looks good. In real live it might be more complicated, depending on what is installed on the original system.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>We have quite a few customers still running on CentOS 8 and you probably already are aware that CentOS 8 will be end of life by the end of this year. This forces a lot of companies to either switch to an alternative or to stick with CentOS stream. For most enterprise workloads CentOS stream [&hellip;]<\/p>\n","protected":false},"author":29,"featured_media":16851,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[229],"tags":[72,73,1462],"type_dbi":[],"class_list":["post-16850","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-database-administration-monitoring","tag-centos","tag-linux","tag-red-hat"],"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>Switching from CentOS 8 to Red Hat 8 - 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\/switching-from-centos-8-to-red-hat-8\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Switching from CentOS 8 to Red Hat 8\" \/>\n<meta property=\"og:description\" content=\"We have quite a few customers still running on CentOS 8 and you probably already are aware that CentOS 8 will be end of life by the end of this year. 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He has more than 15 years of experience in management, engineering and optimization of databases and infrastructures, especially on Oracle and PostgreSQL. Since the beginning of his career, he has specialized in Oracle Technologies and is Oracle Certified Professional 12c and Oracle Certified Expert RAC\/GridInfra. Over time, Daniel has become increasingly interested in open source technologies, becoming \u201cTechnology Leader Open Infrastructure\u201d and PostgreSQL expert. \u00a0Based on community or EnterpriseDB tools, he develops and installs complex high available solutions with PostgreSQL. He is also a certified PostgreSQL Plus 9.0 Professional and a Postgres Advanced Server 9.4 Professional. He is a regular speaker at PostgreSQL conferences in Switzerland and Europe. Today Daniel is also supporting our customers on AWS services such as AWS RDS, database migrations into the cloud, EC2 and automated infrastructure management with AWS SSM (System Manager). He is a certified AWS Solutions Architect Professional. Prior to dbi services, Daniel was Management System Engineer at LC SYSTEMS-Engineering AG in Basel. Before that, he worked as Oracle Developper &amp;\u00a0Project Manager at Delta Energy Solutions AG in Basel (today Powel AG). Daniel holds a diploma in Business Informatics (DHBW, Germany). His branch-related experience mainly covers the pharma industry, the financial sector, energy, lottery and telecommunications.","sameAs":["https:\/\/x.com\/westermanndanie"],"url":"https:\/\/www.dbi-services.com\/blog\/author\/daniel-westermann\/"}]}},"_links":{"self":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/posts\/16850","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/users\/29"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/comments?post=16850"}],"version-history":[{"count":0,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/posts\/16850\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/media\/16851"}],"wp:attachment":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/media?parent=16850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/categories?post=16850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/tags?post=16850"},{"taxonomy":"type","embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/type_dbi?post=16850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}