Pin CLN mirror during conversion

Author: Grigory Ponomarenko

repos/system_upgrade/cloudlinux/actors/pinclnmirror/actor.py

@@ -0,0 +1,48 @@
+import json
+import os.path
+
+from leapp.actors import Actor
+from leapp.libraries.common.cllaunch import run_on_cloudlinux
+from leapp.libraries.stdlib import api
+from leapp.tags import DownloadPhaseTag, IPUWorkflowTag
+
+
+class PinClnMirror(Actor):
+    """
+    Pin CLN mirror.
+
+    In Spacewalk plugin new mirror (new repo URI) may be choosen on each `dnf` invocation.
+    Dnf caches packages per repo URI. That all may lead to a situation when package is downloaded from a mirror
+    but dnf can't find it in the cache on the next invocation. To fix that, we pin the mirror during the upgrade.
+    Mirror is unpinned by UninClnMirror actor.
+    """
+
+    name = 'pin_cln_mirror'
+    consumes = ()
+    produces = ()
+    tags = (IPUWorkflowTag, DownloadPhaseTag.After)
+
+    CLN_REPO_ID = "cloudlinux-x86_64-server-8"
+    DEFAULT_CLN_MIRROR = "https://xmlrpc.cln.cloudlinux.com/XMLRPC/"
+    NEW_ROOT = '/var/lib/leapp/el8userspace'
+
+    @run_on_cloudlinux
+    def process(self):
+        # load last mirror URL from dnf spacewalk plugin cache
+        spacewalk_settings = {}
+
+        try:
+            with open(os.path.join(self.NEW_ROOT, '/var/lib/dnf/_spacewalk.json')) as file:
+                spacewalk_settings = json.load(file)
+        except (OSError, IOError, json.JSONDecodeError):
+            api.current_logger().error("No spacewalk settings found")
+
+        mirror_url = spacewalk_settings.get(self.CLN_REPO_ID, {}).get("url", [self.DEFAULT_CLN_MIRROR])[0]
+        api.current_logger().info("Pin CLN mirror: %s", mirror_url)
+
+        # pin mirror
+        with open(os.path.join(self.NEW_ROOT, '/etc/mirrorlist'), 'w') as file:
+            file.write(mirror_url + '\n')
+
+        with open(os.path.join(self.NEW_ROOT, '/etc/sysconfig/rhn/up2date'), 'a+') as file:
+            file.write('\nmirrorURL=file:///etc/mirrorlist\n')

repos/system_upgrade/cloudlinux/actors/unpinclnmirror/actor.py

@@ -0,0 +1,34 @@
+import os
+
+from leapp.actors import Actor
+from leapp.libraries.common.cllaunch import run_on_cloudlinux
+from leapp.tags import FirstBootPhaseTag, IPUWorkflowTag
+
+class UnpinClnMirror(Actor):
+    """
+    Remove pinned CLN mirror
+    """
+
+    name = 'unpin_cln_mirror'
+    consumes = ()
+    produces = ()
+    tags = (IPUWorkflowTag, FirstBootPhaseTag)
+
+    CLN_REPO_ID = "cloudlinux-x86_64-server-8"
+    DEFAULT_CLN_MIRROR = "https://xmlrpc.cln.cloudlinux.com/XMLRPC/"
+    MIRRORLIST_PATH = '/var/lib/leapp/el8userspace/etc/mirrorlist'
+    UP2DATE_PATH = '/var/lib/leapp/el8userspace/etc/sysconfig/rhn/up2date'
+
+    @run_on_cloudlinux
+    def process(self):
+        try:
+            os.remove(self.MIRRORLIST_PATH)
+        except FileNotFoundError:
+            self.log.info('mirrorlist does not exist, doing nothing.')
+
+        with open(self.UP2DATE_PATH, 'r') as file:
+            lines = [
+                line for line in file.readlines() if 'mirrorURL=file:///etc/mirrorlist' not in line
+            ]
+        with open(self.UP2DATE_PATH, 'w') as file:
+            file.writelines(lines)