Remove support for CentOS 7

CentOS 8 support is now fairly complete - time to drop CentOS 7.

Partially-Implements: blueprint centos-rhel-8

Change-Id: I940b1d3eceb98e16fa366c243672f588b1412d70

ansible/group_vars/all.yml

@@ -844,7 +844,7 @@ gnocchi_metric_datadir_volume: "gnocchi"
 cinder_backend_ceph: "no"
 cinder_backend_vmwarevc_vmdk: "no"
 cinder_volume_group: "cinder-volumes"
-cinder_target_helper: "{{ 'lioadm' if ansible_os_family == 'RedHat' and ansible_distribution_major_version is version_compare('8', '>=') else 'tgtadm' }}"
+cinder_target_helper: "{{ 'lioadm' if ansible_os_family == 'RedHat' else 'tgtadm' }}"
 # Valid options are [ '', redis, etcd ]
 cinder_coordination_backend: "{{ 'redis' if enable_redis|bool else 'etcd' if enable_etcd|bool else '' }}"
 
@@ -1051,9 +1051,9 @@ kafka_datadir_volume: "kafka"
 # Internal Image options
 #########################
 distro_python_version_map: {
-  "centos": "{{ '3.6' if ansible_distribution_major_version is version(8, '>=') else '2.7' }}",
+  "centos": "3.6",
   "debian": "3.7",
-  "rhel": "{{ '3.6' if ansible_distribution_major_version is version(8, '>=') else '2.7' }}",
+  "rhel": "3.6",
   "ubuntu": "3.6"
 }
 

ansible/roles/baremetal/defaults/main.yml

@@ -11,8 +11,7 @@ docker_apt_package: "docker-ce"
 
 # Docker Yum repository configuration.
 docker_yum_url: "https://download.docker.com/linux/{{ ansible_distribution | lower }}"
-# FIXME(mgoddard): Use {{ ansible_distribution_major_version | lower }} rather
-# than 7.
+# FIXME(mgoddard): $releasever rather than 7.
 docker_yum_baseurl: "{{ docker_yum_url }}/7/$basearch/stable"
 docker_yum_gpgkey: "{{ docker_yum_url }}/gpg"
 docker_yum_gpgcheck: true
@@ -46,8 +45,7 @@ easy_install_available: >-
      not (ansible_distribution == 'Debian' and
           ansible_distribution_major_version is version(10, 'ge'))
      and
-     not (ansible_os_family == 'RedHat' and
-          ansible_distribution_major_version is version(8, 'ge')) }}
+     not ansible_os_family == 'RedHat' }}
 
 # Version of python used to execute Ansible modules.
 host_python_version: "{{ ansible_python.version.major }}.{{ ansible_python.version.minor }}"

ansible/roles/baremetal/tasks/install.yml

@@ -55,10 +55,8 @@
   register: apt_install_result
 
 - name: Install deltarpm packages
-  vars:
-    package_name: "{{ 'deltarpm' if ansible_distribution_major_version == '7' else 'drpm' }}"
   package:
-    name: "{{ package_name }}"
+    name: drpm
     state: present
     update_cache: yes
   become: True

ansible/roles/baremetal/tasks/pre-install.yml

@@ -139,8 +139,6 @@
             line: "module_hotfixes = True"
             state: present
           become: True
-          when:
-            - ansible_distribution_major_version == '8'
 
         - name: Install docker rpm gpg key
           rpm_key:

ansible/roles/haproxy/templates/haproxy_run.sh.j2

@@ -1,6 +1,4 @@
 #!/bin/bash -x
-{% set has_haproxy_1_8=kolla_base_distro in ['debian', 'ubuntu'] or (kolla_base_distro == 'centos' and ansible_distribution_major_version is version(8, '>=')) %}
-{% set haproxy_cmd='/usr/sbin/haproxy -W -db' if has_haproxy_1_8 else '/usr/sbin/haproxy-systemd-wrapper' %}
 
 # We need to run haproxy with one `-f` for each service, because including an
 # entire config directory was not a feature until version 1.7 of HAProxy.
@@ -8,4 +6,4 @@
 # This will run haproxy_cmd *exactly once*.
 find /etc/haproxy/services.d/ -mindepth 1 -print0 | \
     xargs -0 -Icfg echo -f cfg | \
-    xargs {{ haproxy_cmd }} -p /run/haproxy.pid -f /etc/haproxy/haproxy.cfg
+    xargs /usr/sbin/haproxy -W -db -p /run/haproxy.pid -f /etc/haproxy/haproxy.cfg

ansible/roles/iscsi/tasks/precheck.yml

@@ -24,5 +24,4 @@
       The SCSI target daemon tgtd is not supported on CentOS/RHEL 8 and later
   when:
     - ansible_os_family == 'RedHat'
-    - ansible_distribution_major_version is version_compare('8', '>=')
     - enable_tgtd | bool

tests/deploy-ceph-ansible.sh

@@ -8,12 +8,7 @@ export PYTHONUNBUFFERED=1
 
 function setup_ceph_ansible {
     # Prepare virtualenv for ceph-ansible deployment
-    # NOTE(mnasiadka): Use python2 on centos7 due to missing python3 selinux bindings
-    if [[ $BASE_DISTRO == "centos" ]] && [[ $BASE_DISTRO_MAJOR_VERSION -eq 8 ]]; then
-        virtualenv --system-site-packages ~/ceph-venv
-    else
-        virtualenv -p `which python2` --system-site-packages ~/ceph-venv
-    fi
+    virtualenv --system-site-packages ~/ceph-venv
     ~/ceph-venv/bin/pip install -Ir requirements.txt
     ~/ceph-venv/bin/pip install -IU selinux
 }

tests/run.yml

@@ -11,8 +11,6 @@
       vars:
         # NOTE(yoctozepto): needed here to use in other facts too
         openstack_core_enabled: "{{ scenario not in ['bifrost', 'mariadb'] }}"
-        # TODO(mgoddard): Remove when previous_release is ussuri.
-        is_centos8: "{{ ansible_os_family == 'RedHat' and ansible_distribution_major_version | int == 8 }}"
       set_fact:
         kolla_inventory_path: "/etc/kolla/inventory"
         logs_dir: "/tmp/logs"
@@ -26,7 +24,7 @@
         openstack_core_tested: "{{ scenario in ['core', 'ceph-ansible', 'zun', 'cells', 'swift', 'linuxbridge'] }}"
         dashboard_enabled: "{{ openstack_core_enabled }}"
         # TODO(mgoddard): Remove when previous_release is ussuri.
-        playbook_python_version: "{{ '2' if is_upgrade and previous_release == 'train' and not is_centos8 else '3' }}"
+        playbook_python_version: "{{ '2' if is_upgrade and previous_release == 'train' and ansible_os_family != 'RedHat' else '3' }}"
         upper_constraints_file: "{{ ansible_env.HOME }}/src/opendev.org/openstack/requirements/upper-constraints.txt"
 
     - name: Install xfsprogs package for Swift filesystems
@@ -276,7 +274,6 @@
         chdir: "{{ kolla_ansible_src_dir }}"
       environment:
         BASE_DISTRO: "{{ base_distro }}"
-        BASE_DISTRO_MAJOR_VERSION: "{{ ansible_distribution_major_version }}"
         INSTALL_TYPE: "{{ install_type }}"
         BUILD_IMAGE: "{{ need_build_image }}"
         TAG: "{{ build_image_tag }}"
@@ -310,7 +307,6 @@
             chdir: "{{ ceph_ansible_src_dir }}"
           environment:
             BASE_DISTRO: "{{ base_distro }}"
-            BASE_DISTRO_MAJOR_VERSION: "{{ ansible_distribution_major_version }}"
 
         - name: Ensure required kolla config directories exist
           file:

tests/templates/globals-default.j2

@@ -1,12 +1,4 @@
 ---
-{% if ansible_os_family == 'RedHat' and ansible_distribution_major_version == '7' %}
-# Force the use of python2 on CentOS7 remote hosts. This is necessary for
-# delegate_to: localhost, which will otherwise use the local python interpreter
-# (python3).  On CentOS 7, that fails due to a lack of python3 bindings for
-# SELinux.  https://bugs.centos.org/view.php?id=16389
-ansible_python_interpreter: /usr/bin/python2
-{% endif %}
-
 kolla_base_distro: "{{ base_distro }}"
 kolla_install_type: "{{ install_type }}"
 network_interface: "{{ api_interface_name }}"

tools/setup_gate.sh

@@ -45,7 +45,7 @@ function prepare_images {
 
     if [[ $SCENARIO == "zun" ]]; then
         GATE_IMAGES+=",^zun,^kuryr,^etcd,^cinder,^iscsid"
-        if [[ $BASE_DISTRO != "centos" ]] || [[ $BASE_DISTRO_MAJOR_VERSION -eq 7 ]]; then
+        if [[ $BASE_DISTRO != "centos" ]]; then
             GATE_IMAGES+=",^tgtd"
         fi
     fi