cat /etc/redhat-release
CentOS Stream release 9
RPM:- Package Manager and the package format used by many Linux distributions such as Fedora, RedHat, and CentOS to manage and distribute software in binary form.
rpmbuild directory is known as the root directory for the rpm build environment
tree rpmbuild
rpmbuild
├── BUILD
├── RPMS
├── SOURCES
├── SPECS
└── SRPMS
BUILD - directory, where the source code of the program want to package, is built
RPMS - where the rpm packages generated
SOURCES - have compressed source code of the software inthe form of a tarball or a zip file.
SPECS - have a .spec file with instructions to build the package
SRPMS - same as RPMS, but for source RPMS. these special packages contain the original source code of the application.
the spec file is where all instructions and information needed to build an rpm package are defined.
Build RPM: Example to build an RPM Create a local yum repo.
#as root
yum repolist
yum install -y rpmdevtools rpm-build
mv /etc/yum.repos.d/centos.repo /tmp
yum repolist
ls -l /etc/yum.repos.d/
#su to user account (recommended)
rpmdev-setuptree
ls -l rpmbuild
tree rpmbuild
rpmbuild
├── BUILD
├── RPMS
├── SOURCES
├── SPECS
└── SRPMS
5 directories, 0 files
cd rpmbuild/SOURCES/
ls
mkdir -p localrepo-1/etc/yum.repos.d/
ls
localrepo-1
Mount RHEL 9 ISO File or DVD
sudo mkdir /var/repo
sudo mount -o loop rhel-baseos-9.0-x86_64-dvd.iso /var/repo/
sudo mount /dev/sr0 /var/repo/
vim localrepo-1/etc/yum.repos.d/RHEL9local.repo
[Local-BaseOS]
name=Red Hat Enterprise Linux 9 - BaseOS
metadata_expire=-1
gpgcheck=1
enabled=1
baseurl=file:///var/repo/BaseOS/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
[Local-AppStream]
name=Red Hat Enterprise Linux 9 - AppStream
metadata_expire=-1
gpgcheck=1
enabled=1
baseurl=file:///var/repo/AppStream/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
tar -cvzf localrepo-1.tar.gz localrepo-1/
localrepo-1/
localrepo-1/etc/
localrepo-1/etc/yum.repos.d/
localrepo-1/etc/yum.repos.d/RHEL9local.repo
cd ../SPECS/
ls
#create spec file
rpmdev-newspec localrepo.spec
localrepo.spec created; type minimal, rpm version >= 4.16.
vim localrepo.spec
Name: localrepo
Version: 1
Release: 0
Summary: Local Repo For RHEL 9
Group: System Environment/Base
License: GPL
URL: https://www.linuxmissive.com/
Source0: localrepo-1.tar.gz
BuildArch: noarch
BuildRoot: %{_tmppath}/%{name}-buildroot
%description
Create a local yum repo file in /etc/yum.repos.d/ directory.
%prep
%setup -q
%install
mkdir -p "$RPM_BUILD_ROOT"
cp -R * "$RPM_BUILD_ROOT"
%clean
rm -rf $RPM_BUILD_ROOT
%files
%defattr(-,root,root,-)
/etc/yum.repos.d/RHEL9local.repo
%changelog
* Wed Feb 15 2023 Jojan Paul <jpmolekunnel@gmail.com>
-
cd
#build now
rpmbuild -v -bb rpmbuild/SPECS/localrepo.spec
rpm -qpl rpmbuild/RPMS/noarch/localrepo-1-0.noarch.rpm
/etc/yum.repos.d/RHEL9local.repo
#install rpm as root
su -
rpm -ivh /home/devops/rpmbuild/RPMS/noarch/localrepo-1-0.noarch.rpm
rpm -qa | grep localrepo
localrepo-1-0.noarch
cd /etc/yum.repos.d/
ls
centos-addons.repo RHEL9local.repo
#check yum repo working after installing rpm package
yum repolist
repo id repo name
Local-AppStream Red Hat Enterprise Linux 9 - AppStream
Local-BaseOS Red Hat Enterprise Linux 9 - BaseOS
extras-common CentOS Stream 9 - Extras packages
#test
yum install httpd
