fix(openeuler): add configurable openeuler_repo_baseurl for faster mirrors (#13134)

Add openeuler_repo_baseurl variable to override the default baseurl
(repo.openeuler.org) with a faster mirror. CI uses Huawei Cloud CDN,
reducing package installation from >900s timeout to ~2min.

Signed-off-by: Kay Yan <kay.yan@daocloud.io>

roles/bootstrap_os/defaults/main.yml

@@ -15,6 +15,10 @@ epel_enabled: false
 ## openEuler specific variables
 # Enable metalink for openEuler repos (auto-selects fastest mirror by location)
 openeuler_metalink_enabled: false
+# Override the default baseurl host for openEuler repos.
+# Used as fallback when metalink is unavailable (502/timeout).
+# Default repo.openeuler.org (Hong Kong) is slow from many CI/cloud environments.
+openeuler_repo_baseurl: ""
 
 ## Oracle Linux specific variables
 # Install public repo on Oracle Linux

roles/bootstrap_os/tasks/openEuler.yml

@@ -54,6 +54,15 @@
       update: "https://mirrors.openeuler.org/metalink?repo={{ _openeuler_releasever }}/update&arch=$basearch"
       update-source: "https://mirrors.openeuler.org/metalink?repo={{ _openeuler_releasever }}/update&arch=source"
 
+- name: Override baseurl to a faster mirror (fallback when metalink is unavailable)
+  ansible.builtin.replace:
+    path: /etc/yum.repos.d/openEuler.repo
+    regexp: 'baseurl=http://repo\.openeuler\.org/'
+    replace: "baseurl={{ openeuler_repo_baseurl }}/"
+    mode: "0644"
+  become: true
+  when: openeuler_repo_baseurl != ""
+
 - name: Clean dnf metadata cache to apply metalink mirror selection
   ansible.builtin.command: dnf clean metadata
   become: true