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"""
Mixin classes meant to be used with subclasses of OpenShiftCheck.
"""
class NotContainerizedMixin(object):
"""Mixin for checks that are only active when not in containerized mode."""
# permanent # pylint: disable=too-few-public-methods
# Reason: The mixin is not intended to stand on its own as a class.
def is_active(self):
"""Only run on non-containerized hosts."""
openshift_is_containerized = self.get_var("openshift_is_containerized")
return super(NotContainerizedMixin, self).is_active() and not openshift_is_containerized
class DockerHostMixin(object):
"""Mixin for checks that are only active on hosts that require Docker."""
dependencies = []
def is_active(self):
"""Only run on hosts that depend on Docker."""
group_names = set(self.get_var("group_names", default=[]))
needs_docker = set(["oo_nodes_to_config"])
if self.get_var("openshift_is_containerized"):
needs_docker.update(["oo_masters_to_config", "oo_etcd_to_config"])
return super(DockerHostMixin, self).is_active() and bool(group_names.intersection(needs_docker))
def ensure_dependencies(self):
"""
Ensure that docker-related packages exist, but not on atomic hosts
(which would not be able to install but should already have them).
Returns: msg, failed
"""
if self.get_var("openshift_is_atomic"):
return "", False
# NOTE: we would use the "package" module but it's actually an action plugin
# and it's not clear how to invoke one of those. This is about the same anyway:
result = self.execute_module_with_retries(
self.get_var("ansible_pkg_mgr", default="yum"),
{"name": self.dependencies, "state": "present"},
)
msg = result.get("msg", "")
if result.get("failed"):
if "No package matching" in msg:
msg = "Ensure that all required dependencies can be installed via `yum`.\n"
msg = (
"Unable to install required packages on this host:\n"
" {deps}\n{msg}"
).format(deps=',\n '.join(self.dependencies), msg=msg)
failed = result.get("failed", False) or result.get("rc", 0) != 0
return msg, failed
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