ambari自动生成的repo文件url为空

报错：Traceback (most recent call last):

  File "/var/lib/ambari-agent/cache/stack-hooks/before-INSTALL/scripts/hook.py", line 37, in

    BeforeInstallHook().execute()

  File "/usr/lib/ambari-agent/lib/resource_management/libraries/script/script.py", line 352, in execute

    method(env)

  File "/var/lib/ambari-agent/cache/stack-hooks/before-INSTALL/scripts/hook.py", line 33, in hook

    install_packages()

  File "/var/lib/ambari-agent/cache/stack-hooks/before-INSTALL/scripts/shared_initialization.py", line 37, in install_packages

    retry_count=params.agent_stack_retry_count)

  File "/usr/lib/ambari-agent/lib/resource_management/core/base.py", line 166, in __init__

    self.env.run()

  File "/usr/lib/ambari-agent/lib/resource_management/core/environment.py", line 160, in run

    self.run_action(resource, action)

  File "/usr/lib/ambari-agent/lib/resource_management/core/environment.py", line 124, in run_action

    provider_action()

  File "/usr/lib/ambari-agent/lib/resource_management/core/providers/packaging.py", line 30, in action_install

    self._pkg_manager.install_package(package_name, self.__create_context())

  File "/usr/lib/ambari-agent/lib/ambari_commons/repo_manager/yum_manager.py", line 219, in install_package

    shell.repository_manager_executor(cmd, self.properties, context)

  File "/usr/lib/ambari-agent/lib/ambari_commons/shell.py", line 753, in repository_manager_executor

    raise RuntimeError(message)

RuntimeError: Failed to execute command '/usr/bin/yum -y install hdp-select', exited with code '1', message: '

One of the configured repositories failed (Unknown),

and yum doesn't have enough cached data to continue. At this point the only

safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working

        upstream. This is most often useful if you are using a newer

        distribution release than is supported by the repository (and the

        packages for the previous distribution release still work).

     3. Disable the repository, so yum won't use it by default. Yum will then

        just ignore the repository until you permanently enable it again or use

        --enablerepo for temporary usage:

            yum-config-manager --disable

     4. Configure the failing repository to be skipped, if it is unavailable.

        Note that yum will try to contact the repo. when it runs most commands,

        so will have to try and fail each time (and thus. yum will be be much

        slower). If it is a very temporary problem though, this is often a nice

        compromise:

            yum-config-manager --save --setopt=.skip_if_unavailable=true

Cannot find a valid baseurl for repo: HDP-3.1-repo-4

1、登录数据库修改表

sudo mysql -u root -p

use ambari;

update repo_definition set base_url="http://x.x.x.x/hdp/centos7/3.1.0.0-78/" where repo_name="HDP";

update repo_definition set base_url="http://x.x.x.x/hdp-utils/centos7/1.1.0.22/" where repo_name="HDP-UTILS";

update repo_definition set base_url="http://x.x.x.x/hdp-gpl/centos7/3.1.0.0-78/" where repo_name= "HDP-GPL";

2、删除生成的空的repo文件，并且刷新源

yum clean all && yum makecache

3、然后重启服务，不需要重新注册，页面会自动跳转到step9.

有些情况HDP-GPL为官网地址，还需要再此更新为实际地址，再此重启ambari-server。