def _fix_default_links_for_current(self):
"""
If a prior version of Ambari did not correctly reverse the conf symlinks, then they would
be put into a bad state when distributing a new stack. For example:
/etc/component/conf (directory)
<stack-root>/v1/component/conf -> /etc/component/conf
When distributing v2, we'd detect the /etc/component/conf problems and would try to adjust it:
/etc/component/conf -> <stack-root>/current/component/conf
<stack-root>/v2/component/conf -> /etc/component/v2/0
The problem is that v1 never gets changed (since the stack being distributed is v2), and
we end up with a circular link:
/etc/component/conf -> <stack-root>/current/component/conf
<stack-root>/v1/component/conf -> /etc/component/conf
:return: None
"""
Logger.info(
"Attempting to fix any configuration symlinks which are not in the correct state"
)
from resource_management.libraries.functions import stack_select
restricted_packages = conf_select.get_restricted_packages()
if 0 == len(restricted_packages):
Logger.info(
"There are no restricted conf-select packages for this installation"
)
else:
Logger.info("Restricting conf-select packages to {0}".format(
restricted_packages))
for package_name, directories in conf_select.get_package_dirs(
).iteritems():
Logger.info(
"Attempting to fix the default conf links for {0}".format(
package_name))
Logger.info(
"The following directories will be fixed for {0}: {1}".format(
package_name, str(directories)))
component_name = None
for directory_struct in directories:
if "component" in directory_struct:
component_name = directory_struct["component"]
if component_name:
stack_version = stack_select.get_stack_version_before_install(
component_name)
if 0 == len(restricted_packages
) or package_name in restricted_packages:
if stack_version:
conf_select.convert_conf_directories_to_symlinks(
package_name, stack_version, directories)
else:
Logger.warning(
"Unable to fix {0} since there is no known installed version for this component"
.format(package_name))
def _relink_configurations_with_conf_select(self, stack_id, stack_version):
"""
Sets up the required structure for /etc/<component>/conf symlinks and <stack-root>/current
configuration symlinks IFF the current stack is < HDP 2.3+ and the new stack is >= HDP 2.3
stack_id: stack id, ie HDP-2.3
stack_version: version to set, ie 2.3.0.0-1234
"""
if stack_id is None:
Logger.info(
"Cannot create config links when stack_id is not defined")
return
args = stack_id.upper().split('-')
if len(args) != 2:
Logger.info(
"Unrecognized stack id {0}, cannot create config links".format(
stack_id))
return
target_stack_version = args[1]
if not (target_stack_version and check_stack_feature(
StackFeature.CONFIG_VERSIONING, target_stack_version)):
Logger.info("Configuration symlinks are not needed for {0}".format(
stack_version))
return
# After upgrading hdf-select package from HDF-2.X to HDF-3.Y, we need to create this symlink
if self.stack_name.upper() == "HDF" \
and not sudo.path_exists("/usr/bin/conf-select") and sudo.path_exists("/usr/bin/hdfconf-select"):
Link("/usr/bin/conf-select", to="/usr/bin/hdfconf-select")
restricted_packages = conf_select.get_restricted_packages()
if 0 == len(restricted_packages):
Logger.info(
"There are no restricted conf-select packages for this installation"
)
else:
Logger.info("Restricting conf-select packages to {0}".format(
restricted_packages))
for package_name, directories in conf_select.get_package_dirs(
).iteritems():
if 0 == len(restricted_packages
) or package_name in restricted_packages:
conf_select.convert_conf_directories_to_symlinks(
package_name, stack_version, directories)
def test_restrictions(self):
Script.config.update({
'roleParameters': {
'cluster_version_summary': {
'services': {
'HIVE': {
'upgrade': True
}
}
}
}
})
restricted = conf_select.get_restricted_packages()
self.assertTrue("hive" in restricted)
self.assertTrue("hive-hcatalog" in restricted)
self.assertTrue("hive2" in restricted)
self.assertTrue("tez_hive2" in restricted)
self.assertTrue("hadoop" not in restricted)
