/etc/yum.repos.d/CentOS-Base.repo を編集。 [base]と[update]に exclude=postgresql* を追記 そして下記を実行 cd /usr/local/src/yumrpm wget http://yum.pgsqlrpms.org/reporpms/8.4/pgdg-centos-8.4-1.noarch.rpm rpm -ivh pgdg-centos-8.4-1.noarch.rpm yum install postgresql postgresql-server postgresql-devel compat-postgresql-libs postgresql-libs postgresql-contrib yum -y --enablerepo=remi,epel,rpmforge install php-pgsql ser