PostgreSQL15Beta1已于2022-05-19发布，在前一天，也就是2022-05-18，RHEL9.0也正式GA。于是从access.redhat.com下载了RHEL9.0的安装介质，该介质有8GB大小。使用虚拟机进行了RHEL9.0的安装（最小化安装），总体来看，安装界面跟RHEL8.x和RHEL7.x差不多，只是下面的界面有点不同：
默认值是Allow root SSH login with password不打钩。
因此，想用root+密码通过远程登录，在上述安装界面上要做如下设置：
Allow root SSH login with password要打钩。
若是在安装过程中Allow root SSH login with password的复选框没有打钩，那么在安装完成之后，可以进行如下修改以便能root+密码进行远程登录：
[root@rhel90 ~]# cat /etc/ssh/sshd_config |grep -i permit |grep -v ^# PermitRootLogin yes [root@rhel90 ~]# 也就是修改成yes
然后重启sshd即可:systemctl restart sshd
插曲：
若是在RHEL9.0的安装过程中对Allow root SSH login with password的复选框进行了选中，那么该设置会体现在/etc/ssh/sshd_config.d/01-permitrootlogin.conf文件中，该文件的内容如下：
[root@localhost sshd_config.d]# cat 01-permitrootlogin.conf # This file has been generated by the Anaconda Installer. # Allow root to log in using ssh. Remove this file to opt-out. PermitRootLogin yes [root@localhost sshd_config.d]#
然后配置RHEL9.0的yum源，见下：
[root@rhel90 yum.repos.d]# ll total 12 -rw-r--r--. 1 root root 172 May 21 10:56 AppStream.repo -rw-r--r--. 1 root root 163 May 21 10:48 BaseOS.repo -rw-r--r--. 1 root root 358 May 21 10:51 redhat.repo [root@rhel90 yum.repos.d]# cat AppStream.repo [AppStream] name=Red Hat Enterprise Linux 9.0 AppStream baseurl=file:///mnt/cdrom/AppStream/ enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release [root@rhel90 yum.repos.d]# cat BaseOS.repo [BaseOS] name=Red Hat Enterprise Linux 9.0 BaseOS baseurl=file:///mnt/cdrom/BaseOS/ enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release [root@rhel90 yum.repos.d]# # dnf clean all # rm -rf /var/cache/yum/* # dnf makecache # dnf repolist
然后安装PostgreSQL 15所需要的rpm包
dnf install systemtap-sdt-devel -y dnf install gcc -y dnf install libicu-devel -y dnf install bison -y dnf install flex -y dnf install perl -y dnf install readline-devel -y dnf install zlib-devel -y dnf install krb5-devel -y dnf install openssl-devel -y dnf install pam pam-devel -y dnf install libxml2-devel -y dnf install libxslt-devel -y dnf install openldap-devel -y dnf install libuuid libuuid-devel -y dnf install systemd-devel -y dnf install tcl tcl-devel -y dnf install python-devel -y dnf install lz4-devel -y dnf install python3 -y dnf install python3-devel -y dnf install libzstd-devel -y
然后执行PostgreSQL15Beta1的安装过程
./configure --prefix=/home/pg15beta1/soft --includedir=/home/pg15beta1/soft/include --libdir=/home/pg15beta1/soft/lib --mandir=/home/pg15beta1/soft/share/man --datadir=/home/pg15beta1/soft/share --with-icu --with-perl --with-python --with-tcl --with-tclconfig=/usr/lib64 --with-openssl --with-pam --with-gssapi --with-libraries=/usr/lib64 --enable-nls --enable-dtrace --with-uuid=e2fs --with-libxml --with-libxslt --with-ldap --with-selinux --with-systemd --with-system-tzdata=/usr/share/zoneinfo --docdir=/home/pg15beta1/soft/doc --htmldir=/home/pg15beta1/soft/doc/html --with-lz4 --with-zstd
注意：上述编译选项中带有--with-zstd，这也是PG15中新添加的编译选项。
make world make install world [pg15beta1@rhel90 bin]$ ./psql -d postgres -p 5432 psql (15beta1) 输入 "help" 来获取帮助信息. postgres=# select version(); version ------------------------------------------------------------------------------------------------------------- PostgreSQL 15beta1 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 11.2.1 20220127 (Red Hat 11.2.1-9), 64-bit (1 行记录) postgres=# postgres=# dconfig List of non-default configuration parameters Parameter | Value ----------------------------------+-------------------------------------- TimeZone | Asia/Shanghai application_name | psql client_encoding | UTF8 config_file | /home/pg15beta1/data/postgresql.conf data_directory | /home/pg15beta1/data default_text_search_config | pg_catalog.english hba_file | /home/pg15beta1/data/pg_hba.conf ident_file | /home/pg15beta1/data/pg_ident.conf lc_messages | C log_timezone | Asia/Shanghai max_stack_depth | 2MB shared_memory_size | 143MB shared_memory_size_in_huge_pages | 1 wal_buffers | 4MB (14 行记录) postgres=#
