The following Ansible script installs prerequisites. This includes packages for Python, etc. <\/p>\n\n\n\n
---\n- name: Update all packages and install prereqs on AWS Linux\n hosts: all\n become: yes # Required for installing system packages\n\n tasks:\n - name: Update all current packages\n ansible.builtin.yum:\n name: '*'\n state: latest\n\n - name: Ensure dnf-plugins-core is installed (for dnf config-manager)\n ansible.builtin.dnf:\n name: dnf-plugins-core\n state: present\n\n - name: Enable the CRB (CodeReady Builder) repository on Rocky Linux\n ansible.builtin.shell: \n cmd: dnf config-manager --set-enabled crb\n when: ansible_distribution == \"Rocky\" and ansible_distribution_major_version == \"9\"\n\n - name: Install pip, python3-devel, nano\n ansible.builtin.yum:\n name:\n - nano\n - python3-pip # Ensures pip is installed\n - python3-devel # Python development files necessary for psycopg2\n - git\n - htop\n - python3-dnf\n - python3-libselinux\n state: present\n\n - name: Install system packages for psycopg2\n ansible.builtin.yum:\n name:\n - perl\n - perl-App-cpanminus\n - perl-devel\n - postgresql-devel # PostgreSQL development files necessary for psycopg2\n state: present\n - name: Install psycopg2 using pip\n ansible.builtin.pip:\n name: psycopg2-binary\n state: present\n...\n<\/code><\/pre>\n\n\n\nPostgreSQL<\/h2>\n\n\n\n
The following Ansible script installs a single instance of PostgreSQL via ansible.<\/p>\n\n\n\n
---\n- name: Install and configure PostgreSQL 16 on Rocky Linux 9.1\n hosts: all\n become: yes\n\n vars:\n postgres_version: 16\n db_name: \"postgres\"\n user1:\n name: \"dbaadmin\"\n password: \"dbaadmin1234\"\n role: \"superuser\"\n user2:\n name: \"repluser\"\n password: \"repluser1234\"\n role: \"replication\"\n\n tasks:\n - name: Ensure all packages are up to date\n yum:\n name: \"*\"\n state: latest\n\n - name: Add PostgreSQL repository\n yum_repository:\n name: \"postgresql\"\n description: \"PostgreSQL Repository\"\n baseurl: \"https:\/\/download.postgresql.org\/pub\/repos\/yum\/{{ postgres_version }}\/redhat\/rhel-9-x86_64\"\n gpgkey: \"https:\/\/download.postgresql.org\/pub\/repos\/yum\/keys\/PGDG-RPM-GPG-KEY-RHEL\"\n enabled: yes\n state: present\n\n - name: Install PostgreSQL and contrib package\n yum:\n name: \"postgresql{{ postgres_version }}, postgresql{{ postgres_version }}-server, postgresql{{ postgres_version }}-contrib\"\n state: present\n\n - name: Initialize the PostgreSQL database\n command: \"\/usr\/pgsql-{{ postgres_version }}\/bin\/postgresql-{{ postgres_version }}-setup initdb\"\n args:\n creates: \"\/var\/lib\/pgsql\/{{ postgres_version }}\/data\/PG_VERSION\"\n\n - name: Start and enable PostgreSQL service\n systemd:\n name: \"postgresql-{{ postgres_version }}\"\n enabled: yes\n state: started\n\n - name: Install dependencies for psycopg2\n yum:\n name:\n - python3\n - python3-devel\n - gcc\n - postgresql{{ postgres_version }}-devel\n state: present\n\n - name: Install psycopg2 using pip\n pip:\n name: psycopg2\n state: present\n\n - name: Set up PostgreSQL user accounts\n postgresql_user:\n name: \"{{ item.name }}\"\n password: \"{{ item.password }}\"\n role_attr_flags: \"{{ item.role }}\"\n loop:\n - \"{{ user1 }}\"\n - \"{{ user2 }}\"\n\n - name: Allow replication connections\n lineinfile:\n path: \"\/var\/lib\/pgsql\/{{ postgres_version }}\/data\/pg_hba.conf\"\n line: \"host replication {{ user2.name }} 0.0.0.0\/0 md5\"\n create: yes\n\n - name: Configure PostgreSQL for replication and enable pg_stat_statements\n blockinfile:\n path: \"\/var\/lib\/pgsql\/{{ postgres_version }}\/data\/postgresql.conf\"\n block: |\n listen_addresses = '*'\n wal_level = replica\n max_wal_senders = 10\n archive_mode = on\n archive_command = 'cp %p \/var\/lib\/pgsql\/{{ postgres_version }}\/data\/archive\/%f'\n shared_preload_libraries = 'pg_stat_statements'\n\n - name: Restart PostgreSQL to apply changes\n systemd:\n name: \"postgresql-{{ postgres_version }}\"\n state: restarted\n\n - name: Enable pg_stat_statements extension\n postgresql_ext:\n name: pg_stat_statements\n db: \"{{ db_name }}\"\n state: present\n...<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"Prerequisites The following Ansible script installs prerequisites. This includes packages for Python, etc. PostgreSQL The following Ansible script installs a single instance of PostgreSQL via ansible.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[50,18],"class_list":["post-354","post","type-post","status-publish","format-standard","hentry","category-postgresql","tag-ansible","tag-postgresql"],"yoast_head":"\n
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