Add AlmaLinux OS support (#872)

AlmaLinux OS is RHEL-compatible so all the changes needed are trivial.

14 files changed, 62 insertions, 17 deletions

diff --git a/README.md b/README.md
index aa6d84ae..01fd3b07 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ get in contact with that distribution and send them our way!
 
 | Supported OSes | Supported Public Clouds | Supported Private Clouds |
 | --- | --- | --- |
-| Alpine Linux<br />ArchLinux<br />Debian<br />Fedora<br />FreeBSD<br />Gentoo Linux<br />NetBSD<br />OpenBSD<br />RHEL/CentOS<br />SLES/openSUSE<br />Ubuntu<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /> | Amazon Web Services<br />Microsoft Azure<br />Google Cloud Platform<br />Oracle Cloud Infrastructure<br />Softlayer<br />Rackspace Public Cloud<br />IBM Cloud<br />Digital Ocean<br />Bigstep<br />Hetzner<br />Joyent<br />CloudSigma<br />Alibaba Cloud<br />OVH<br />OpenNebula<br />Exoscale<br />Scaleway<br />CloudStack<br />AltCloud<br />SmartOS<br />HyperOne<br />Vultr<br />Rootbox<br /> | Bare metal installs<br />OpenStack<br />LXD<br />KVM<br />Metal-as-a-Service (MAAS)<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />|
+| Alpine Linux<br />ArchLinux<br />Debian<br />Fedora<br />FreeBSD<br />Gentoo Linux<br />NetBSD<br />OpenBSD<br />RHEL/CentOS/AlmaLinux<br />SLES/openSUSE<br />Ubuntu<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /> | Amazon Web Services<br />Microsoft Azure<br />Google Cloud Platform<br />Oracle Cloud Infrastructure<br />Softlayer<br />Rackspace Public Cloud<br />IBM Cloud<br />Digital Ocean<br />Bigstep<br />Hetzner<br />Joyent<br />CloudSigma<br />Alibaba Cloud<br />OVH<br />OpenNebula<br />Exoscale<br />Scaleway<br />CloudStack<br />AltCloud<br />SmartOS<br />HyperOne<br />Vultr<br />Rootbox<br /> | Bare metal installs<br />OpenStack<br />LXD<br />KVM<br />Metal-as-a-Service (MAAS)<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />|
 
 ## To start developing cloud-init
 
diff --git a/cloudinit/config/cc_ntp.py b/cloudinit/config/cc_ntp.py
index e183993f..41c278ff 100644
--- a/cloudinit/config/cc_ntp.py
+++ b/cloudinit/config/cc_ntp.py
@@ -24,8 +24,8 @@ LOG = logging.getLogger(__name__)
 frequency = PER_INSTANCE
 NTP_CONF = '/etc/ntp.conf'
 NR_POOL_SERVERS = 4
-distros = ['alpine', 'centos', 'debian', 'fedora', 'opensuse', 'rhel',
-           'sles', 'ubuntu']
+distros = ['almalinux', 'alpine', 'centos', 'debian', 'fedora', 'opensuse',
+           'rhel', 'sles', 'ubuntu']
 
 NTP_CLIENT_CONFIG = {
     'chrony': {
diff --git a/cloudinit/config/cc_yum_add_repo.py b/cloudinit/config/cc_yum_add_repo.py
index 01fe683c..db513ed7 100644
--- a/cloudinit/config/cc_yum_add_repo.py
+++ b/cloudinit/config/cc_yum_add_repo.py
@@ -18,7 +18,7 @@ entry, the config entry will be skipped.
 
 **Module frequency:** per always
 
-**Supported distros:** centos, fedora, rhel
+**Supported distros:** almalinux, centos, fedora, rhel
 
 **Config keys**::
 
@@ -36,7 +36,7 @@ from configparser import ConfigParser
 
 from cloudinit import util
 
-distros = ['centos', 'fedora', 'rhel']
+distros = ['almalinux', 'centos', 'fedora', 'rhel']
 
 
 def _canonicalize_id(repo_id):
diff --git a/cloudinit/distros/__init__.py b/cloudinit/distros/__init__.py
index 8b8a647d..107b928c 100755
--- a/cloudinit/distros/__init__.py
+++ b/cloudinit/distros/__init__.py
@@ -46,7 +46,7 @@ OSFAMILIES = {
     'debian': ['debian', 'ubuntu'],
     'freebsd': ['freebsd'],
     'gentoo': ['gentoo'],
-    'redhat': ['amazon', 'centos', 'fedora', 'rhel'],
+    'redhat': ['almalinux', 'amazon', 'centos', 'fedora', 'rhel'],
     'suse': ['opensuse', 'sles'],
 }
 
diff --git a/cloudinit/distros/almalinux.py b/cloudinit/distros/almalinux.py
new file mode 100644
index 00000000..edb3165d
--- /dev/null
+++ b/cloudinit/distros/almalinux.py
@@ -0,0 +1,9 @@
+# This file is part of cloud-init. See LICENSE file for license information.
+
+from cloudinit.distros import rhel
+
+
+class Distro(rhel.Distro):
+    pass
+
+# vi: ts=4 expandtab
diff --git a/cloudinit/net/sysconfig.py b/cloudinit/net/sysconfig.py
index e4607804..089b44b2 100644
--- a/cloudinit/net/sysconfig.py
+++ b/cloudinit/net/sysconfig.py
@@ -19,7 +19,7 @@ from .network_state import (
 
 LOG = logging.getLogger(__name__)
 NM_CFG_FILE = "/etc/NetworkManager/NetworkManager.conf"
-KNOWN_DISTROS = ['centos', 'fedora', 'rhel', 'suse']
+KNOWN_DISTROS = ['almalinux', 'centos', 'fedora', 'rhel', 'suse']
 
 
 def _make_header(sep='#'):
diff --git a/cloudinit/tests/test_util.py b/cloudinit/tests/test_util.py
index e811917e..a4c02877 100644
--- a/cloudinit/tests/test_util.py
+++ b/cloudinit/tests/test_util.py
@@ -107,12 +107,31 @@ OS_RELEASE_REDHAT_7 = dedent("""\
     REDHAT_SUPPORT_PRODUCT_VERSION="7.5"
 """)
 
+OS_RELEASE_ALMALINUX_8 = dedent("""\
+    NAME="AlmaLinux"
+    VERSION="8.3 (Purple Manul)"
+    ID="almalinux"
+    ID_LIKE="rhel centos fedora"
+    VERSION_ID="8.3"
+    PLATFORM_ID="platform:el8"
+    PRETTY_NAME="AlmaLinux 8.3 (Purple Manul)"
+    ANSI_COLOR="0;34"
+    CPE_NAME="cpe:/o:almalinux:almalinux:8.3:GA"
+    HOME_URL="https://almalinux.org/"
+    BUG_REPORT_URL="https://bugs.almalinux.org/"
+
+    ALMALINUX_MANTISBT_PROJECT="AlmaLinux-8"
+    ALMALINUX_MANTISBT_PROJECT_VERSION="8.3"
+""")
+
 REDHAT_RELEASE_CENTOS_6 = "CentOS release 6.10 (Final)"
 REDHAT_RELEASE_CENTOS_7 = "CentOS Linux release 7.5.1804 (Core)"
 REDHAT_RELEASE_REDHAT_6 = (
     "Red Hat Enterprise Linux Server release 6.10 (Santiago)")
 REDHAT_RELEASE_REDHAT_7 = (
     "Red Hat Enterprise Linux Server release 7.5 (Maipo)")
+REDHAT_RELEASE_ALMALINUX_8 = (
+    "AlmaLinux release 8.3 (Purple Manul)")
 
 
 OS_RELEASE_DEBIAN = dedent("""\
@@ -503,6 +522,22 @@ class TestGetLinuxDistro(CiTestCase):
         self.assertEqual(('centos', '7', 'Core'), dist)
 
     @mock.patch('cloudinit.util.load_file')
+    def test_get_linux_almalinux8_rhrelease(self, m_os_release, m_path_exists):
+        """Verify almalinux 8 read from redhat-release."""
+        m_os_release.return_value = REDHAT_RELEASE_ALMALINUX_8
+        m_path_exists.side_effect = TestGetLinuxDistro.redhat_release_exists
+        dist = util.get_linux_distro()
+        self.assertEqual(('almalinux', '8.3', 'Purple Manul'), dist)
+
+    @mock.patch('cloudinit.util.load_file')
+    def test_get_linux_almalinux8_osrelease(self, m_os_release, m_path_exists):
+        """Verify almalinux 8 read from os-release."""
+        m_os_release.return_value = OS_RELEASE_ALMALINUX_8
+        m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
+        dist = util.get_linux_distro()
+        self.assertEqual(('almalinux', '8.3', 'Purple Manul'), dist)
+
+    @mock.patch('cloudinit.util.load_file')
     def test_get_linux_debian(self, m_os_release, m_path_exists):
         """Verify we get the correct name and release name on Debian."""
         m_os_release.return_value = OS_RELEASE_DEBIAN
diff --git a/cloudinit/util.py b/cloudinit/util.py
index 4e0a72db..fdea1181 100644
--- a/cloudinit/util.py
+++ b/cloudinit/util.py
@@ -521,8 +521,8 @@ def system_info():
     if system == "linux":
         linux_dist = info['dist'][0].lower()
         if linux_dist in (
-                'alpine', 'arch', 'centos', 'debian', 'fedora', 'rhel',
-                'suse'):
+                'almalinux', 'alpine', 'arch', 'centos', 'debian', 'fedora',
+                'rhel', 'suse'):
             var = linux_dist
         elif linux_dist in ('ubuntu', 'linuxmint', 'mint'):
             var = 'ubuntu'
diff --git a/config/cloud.cfg.tmpl b/config/cloud.cfg.tmpl
index 7171aaa5..8656daa7 100644
--- a/config/cloud.cfg.tmpl
+++ b/config/cloud.cfg.tmpl
@@ -21,7 +21,7 @@ disable_root: false
 disable_root: true
 {% endif %}
 
-{% if variant in ["alpine", "amazon", "centos", "fedora", "rhel"] %}
+{% if variant in ["almalinux", "alpine", "amazon", "centos", "fedora", "rhel"] %}
 mount_default_fields: [~, ~, 'auto', 'defaults,nofail', '0', '2']
 {% if variant == "amazon" %}
 resize_rootfs: noblock
@@ -153,7 +153,7 @@ cloud_final_modules:
 # (not accessible to handlers/transforms)
 system_info:
    # This will affect which distro class gets used
-{% if variant in ["alpine", "amazon", "arch", "centos", "debian",
+{% if variant in ["almalinux", "alpine", "amazon", "arch", "centos", "debian",
                   "fedora", "freebsd", "netbsd", "openbsd", "rhel",
                   "suse", "ubuntu"] %}
    distro: {{ variant }}
@@ -206,7 +206,7 @@ system_info:
          primary: http://ports.ubuntu.com/ubuntu-ports
          security: http://ports.ubuntu.com/ubuntu-ports
    ssh_svcname: ssh
-{% elif variant in ["alpine", "amazon", "arch", "centos", "fedora",
+{% elif variant in ["almalinux", "alpine", "amazon", "arch", "centos", "fedora",
                     "rhel", "suse"] %}
    # Default user name + that default users groups (if added/used)
    default_user:
diff --git a/systemd/cloud-init-generator.tmpl b/systemd/cloud-init-generator.tmpl
index 0773356b..9b103ef9 100755
--- a/systemd/cloud-init-generator.tmpl
+++ b/systemd/cloud-init-generator.tmpl
@@ -83,7 +83,7 @@ default() {
 
 check_for_datasource() {
     local ds_rc=""
-{% if variant in ["rhel", "fedora", "centos"] %}
+{% if variant in ["almalinux", "rhel", "fedora", "centos"] %}
     local dsidentify="/usr/libexec/cloud-init/ds-identify"
 {% else %}
     local dsidentify="/usr/lib/cloud-init/ds-identify"
diff --git a/systemd/cloud-init.service.tmpl b/systemd/cloud-init.service.tmpl
index f140344d..a5c51277 100644
--- a/systemd/cloud-init.service.tmpl
+++ b/systemd/cloud-init.service.tmpl
@@ -10,7 +10,7 @@ After=systemd-networkd-wait-online.service
 {% if variant in ["ubuntu", "unknown", "debian"] %}
 After=networking.service
 {% endif %}
-{% if variant in ["centos", "fedora", "rhel"] %}
+{% if variant in ["almalinux", "centos", "fedora", "rhel"] %}
 After=network.service
 After=NetworkManager.service
 {% endif %}
diff --git a/tests/unittests/test_cli.py b/tests/unittests/test_cli.py
index 74f85959..f5cf514d 100644
--- a/tests/unittests/test_cli.py
+++ b/tests/unittests/test_cli.py
@@ -224,7 +224,7 @@ class TestCLI(test_helpers.FilesystemMockingTestCase):
         self._call_main(['cloud-init', 'devel', 'schema', '--docs', 'all'])
         expected_doc_sections = [
             '**Supported distros:** all',
-            '**Supported distros:** alpine, centos, debian, fedora',
+            '**Supported distros:** almalinux, alpine, centos, debian, fedora',
             '**Config schema**:\n    **resize_rootfs:** (true/false/noblock)',
             '**Examples**::\n\n    runcmd:\n        - [ ls, -l, / ]\n'
         ]
diff --git a/tools/.github-cla-signers b/tools/.github-cla-signers
index 607f1d8e..48995057 100644
--- a/tools/.github-cla-signers
+++ b/tools/.github-cla-signers
@@ -3,6 +3,7 @@ ajmyyra
 AlexBaranowski
 Aman306
 andrewbogott
+andrewlukoshko
 antonyc
 aswinrajamannar
 beezly
diff --git a/tools/render-cloudcfg b/tools/render-cloudcfg
index ed454840..f5990748 100755
--- a/tools/render-cloudcfg
+++ b/tools/render-cloudcfg
@@ -4,8 +4,8 @@ import argparse
 import os
 import sys
 
-VARIANTS = ["alpine", "amazon", "arch", "centos", "debian", "fedora",
-            "freebsd", "netbsd", "openbsd", "rhel", "suse", "ubuntu",
+VARIANTS = ["almalinux", "alpine", "amazon", "arch", "centos", "debian",
+            "fedora", "freebsd", "netbsd", "openbsd", "rhel", "suse", "ubuntu",
             "unknown"]