在注册到 Red Hat Satellite 6 的内容主机上运行 leapp upgrade 会失败并显示消息：Unable to install RHEL X userspace packages.

Issue

• 使用 leapp 将与 Red Hat Satellite 6 注册的 RHEL-7.9 Content Hosts 升级到 RHEL-8.10 失败并显示以下错误：

  2020-01-01 00:00:00.12345 [ERROR] Actor: target_userspace_creator
  Message: Unable to install RHEL 8 userspace packages.
  Summary:
     Details: Command ['systemd-nspawn', '--register=no', '--quiet', '-D', '/var/lib/leapp/scratch/mounts/root_/system_overlay', '--bind=/etc/hosts:/etc/hosts', '--setenv=LEAPP_NO_RHSM=0', '--setenv=LEAPP_EXPERIMENTAL=0', '
  --
  setenv=LEAPP_COMMON_TOOLS=:/etc/leapp/repos.d/system_upgrade/el7toel8/tools', '
  --
  setenv=LEAPP_COMMON_FILES=:/etc/leapp/repos.d/system_upgrade/el7toel8/files', '--setenv=LEAPP_UNSUPPORTED=0', '--setenv=LEAPP_EXECUTION_ID=123456-abcd-efgh-7890-7dd0123456789', '--setenv=LEAPP_HOSTNAME=client.example.com', 'dnf', 'install', '-y', '--nogpgcheck', '--setopt=module_platform_id=platform:el8', '--setopt=keepcache=1', '--releasever', u'8.10', '--installroot','/el8target', '--disablerepo', '*', '--enablerepo', u'rhel-8-for-x86_64-baseos-rpms', '--enablerepo', u'rhel-8-for-x86_64-appstream-rpms', '--enablerepo', u'rhel-8-for-x86_64-supplementary-rpms', '--enablerepo', u'rhel-8-for-x86_64-baseos-rpms', '--enablerepo',u'rhel-8-for-x86_64-appstream-rpms', '--enablerepo', u'rhel-8-for-x86_64-appstream-rpms', '--enablerepo', u'rhel-8-for-x86_64-baseos-rpms', 'dnf'] failed with exit code 1.
     Stderr: Host and machine ids are equal
  (123a45678b901234c567d8901234efg5): refusing to link journals
             Failed to synchronize cache for repo 'rhel-8-for-x86_64-appstream-rpms', ignoring this repo.
             Failed to synchronize cache for repo 'rhel-8-for-x86_64-supplementary-rpms', ignoring this repo.
             Failed to synchronize cache for repo 'rhel-8-for-x86_64-baseos-rpms', ignoring this repo.
             Error: Unable to find a match: dnf
  

  或者，错误消息如下：

  2020-01-01 00:00:00.12345 [ERROR] Actor: target_userspace_creator
  Message: Cannot find required basic RHEL 8 repositories.
  

• 当试图从 RHEL 8.10 原位升级到 RHEL 9.X 时会出现类似的错误：

  Risk Factor: high
  Title: Unable to install RHEL 9 userspace packages.
  Summary: {"details": "Command ['systemd-nspawn', '--register=no', '--quiet', '--keep-unit', '--capability=all', '-D', '/var/lib/leapp/scratch/mounts/root_/system_overlay', '--setenv=LEAPP_HOSTNAME=client.example.com', '--setenv=LEAPP_EXPERIMENTAL=0', '--setenv=LEAPP_UNSUPPORTED=0', '--setenv=LEAPP_NO_RHSM=0', '--setenv=LEAPP_UPGRADE_PATH_TARGET_RELEASE=9.5', '--setenv=LEAPP_UPGRADE_PATH_FLAVOUR=default', '--setenv=LEAPP_IPU_IN_PROGRESS=8to9', '--setenv=LEAPP_EXECUTION_ID=e853b20e-af72-4819-ac3a-5abe1c0e0b40', '--setenv=LEAPP_COMMON_TOOLS=:/etc/leapp/repos.d/system_upgrade/common/tools:/etc/leapp/repos.d/system_upgrade/el8toel9/tools', '--setenv=LEAPP_COMMON_FILES=:/etc/leapp/repos.d/system_upgrade/common/files:/etc/leapp/repos.d/system_upgrade/el8toel9/files', 'dnf', 'install', '-y', '--setopt=module_platform_id=platform:el9', '--setopt=keepcache=1', '--releasever', '9.5', '--installroot', '/el9target', '--disablerepo', '*', '--enablerepo', 'rhel-9-for-x86_64-appstream-rpms', '--enablerepo', 'rhel-9-for-x86_64-baseos-rpms', 'crypto-policies-scripts', 'kpatch-dnf', 'dnf', 'dnf-command(config-manager)'] failed with exit code 1.", "stderr": "Host and machine ids are equal (b15dcf0b0f4e4f3cb26d20acb8434929): refusing to link journals\nErrors during downloading metadata for repository 'rhel-9-for-x86_64-baseos-rpms':\n  - Status code: 404 for https://satellite.example.com/pulp/content/My_Org/Library/RHEL_CV/content/dist/rhel9/9.5/x86_64/baseos/os/repodata/repomd.xml (IP: 10.x.x.x)\nError: Failed to download metadata for repo 'rhel-9-for-x86_64-baseos-rpms': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried\n"}
  Key: 0e5d8451adfe372b923058fd09028cb5356e733d
  

• 升级失败，并显示以下错误：

  1. Actor: target_userspace_creator
  Message: Unable to install RHEL 9 userspace packages.
  

  或者，错误消息如下：

  Risk Factor: high (inhibitor)
  Title: Cannot find required basic RHEL target repositories.