From 2aca8a4b833897ace556df407040e9eaeff1ebc4 Mon Sep 17 00:00:00 2001 From: Rodolfo Carvalho Date: Tue, 11 Apr 2017 17:09:33 +0200 Subject: Simplify memory availability check, review tests - Fix required memory for etcd hosts (10 -> 20 GB), as per documentation. - Some changes to make the code more similar to the similar DiskAvailability check. - Do not raise exception for hosts that do not have a recommended memory value (those are ignored anyway through `is_active`, so that was essentially dead code). - Test that the required memory is the max of the recommended memories for all groups assigned to a host. E.g. if a host is master and node, we should check that it has enough memory to be a master, because the memory requirement for a master is higher than for a node. --- .../openshift_checks/memory_availability.py | 50 ++++++++++++---------- 1 file changed, 28 insertions(+), 22 deletions(-) (limited to 'roles/openshift_health_checker/openshift_checks/memory_availability.py') diff --git a/roles/openshift_health_checker/openshift_checks/memory_availability.py b/roles/openshift_health_checker/openshift_checks/memory_availability.py index b1629aa89..28805dc37 100644 --- a/roles/openshift_health_checker/openshift_checks/memory_availability.py +++ b/roles/openshift_health_checker/openshift_checks/memory_availability.py @@ -1,5 +1,5 @@ # pylint: disable=missing-docstring -from openshift_checks import OpenShiftCheck, OpenShiftCheckException, get_var +from openshift_checks import OpenShiftCheck, get_var class MemoryAvailability(OpenShiftCheck): @@ -8,31 +8,37 @@ class MemoryAvailability(OpenShiftCheck): name = "memory_availability" tags = ["preflight"] - recommended_memory_mb = { - "nodes": 8 * 1000, - "masters": 16 * 1000, - "etcd": 10 * 1000, + # Values taken from the official installation documentation: + # https://docs.openshift.org/latest/install_config/install/prerequisites.html#system-requirements + recommended_memory_bytes = { + "masters": 16 * 10**9, + "nodes": 8 * 10**9, + "etcd": 20 * 10**9, } @classmethod def is_active(cls, task_vars): - """Skip hosts that do not have recommended memory space requirements.""" + """Skip hosts that do not have recommended memory requirements.""" group_names = get_var(task_vars, "group_names", default=[]) - has_mem_space_recommendation = bool(set(group_names).intersection(cls.recommended_memory_mb)) - return super(MemoryAvailability, cls).is_active(task_vars) and has_mem_space_recommendation + has_memory_recommendation = bool(set(group_names).intersection(cls.recommended_memory_bytes)) + return super(MemoryAvailability, cls).is_active(task_vars) and has_memory_recommendation def run(self, tmp, task_vars): - group_names = get_var(task_vars, "group_names", default=[]) - total_memory = get_var(task_vars, "ansible_memtotal_mb") - - recommended_memory_mb = max(self.recommended_memory_mb.get(group, 0) for group in group_names) - if not recommended_memory_mb: - msg = "Unable to determine recommended memory size for group_name {group_name}" - raise OpenShiftCheckException(msg.format(group_name=group_names)) - - if total_memory < recommended_memory_mb: - msg = ("Available memory ({available} MB) below recommended storage. " - "Minimum required memory: {recommended} MB") - return {"failed": True, "msg": msg.format(available=total_memory, recommended=recommended_memory_mb)} - - return {"changed": False} + group_names = get_var(task_vars, "group_names") + total_memory_bytes = get_var(task_vars, "ansible_memtotal_mb") * 10**6 + + min_memory_bytes = max(self.recommended_memory_bytes.get(name, 0) for name in group_names) + + if total_memory_bytes < min_memory_bytes: + return { + 'failed': True, + 'msg': ( + 'Available memory ({available:.1f} GB) ' + 'below recommended value ({recommended:.1f} GB)' + ).format( + available=float(total_memory_bytes) / 10**9, + recommended=float(min_memory_bytes) / 10**9, + ), + } + + return {} -- cgit v1.2.3