diff options
Diffstat (limited to 'roles/openshift_health_checker/openshift_checks/disk_availability.py')
-rw-r--r-- | roles/openshift_health_checker/openshift_checks/disk_availability.py | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/roles/openshift_health_checker/openshift_checks/disk_availability.py b/roles/openshift_health_checker/openshift_checks/disk_availability.py new file mode 100644 index 000000000..c2792a0fe --- /dev/null +++ b/roles/openshift_health_checker/openshift_checks/disk_availability.py @@ -0,0 +1,65 @@ +# pylint: disable=missing-docstring +from openshift_checks import OpenShiftCheck, OpenShiftCheckException, get_var +from openshift_checks.mixins import NotContainerizedMixin + + +class DiskAvailability(NotContainerizedMixin, OpenShiftCheck): + """Check that recommended disk space is available before a first-time install.""" + + name = "disk_availability" + tags = ["preflight"] + + # Values taken from the official installation documentation: + # https://docs.openshift.org/latest/install_config/install/prerequisites.html#system-requirements + recommended_disk_space_bytes = { + "masters": 40 * 10**9, + "nodes": 15 * 10**9, + "etcd": 20 * 10**9, + } + + @classmethod + def is_active(cls, task_vars): + """Skip hosts that do not have recommended disk space requirements.""" + group_names = get_var(task_vars, "group_names", default=[]) + has_disk_space_recommendation = bool(set(group_names).intersection(cls.recommended_disk_space_bytes)) + return super(DiskAvailability, cls).is_active(task_vars) and has_disk_space_recommendation + + def run(self, tmp, task_vars): + group_names = get_var(task_vars, "group_names") + ansible_mounts = get_var(task_vars, "ansible_mounts") + + min_free_bytes = max(self.recommended_disk_space_bytes.get(name, 0) for name in group_names) + free_bytes = self.openshift_available_disk(ansible_mounts) + + if free_bytes < min_free_bytes: + return { + 'failed': True, + 'msg': ( + 'Available disk space ({:.1f} GB) for the volume containing ' + '"/var" is below minimum recommended space ({:.1f} GB)' + ).format(float(free_bytes) / 10**9, float(min_free_bytes) / 10**9) + } + + return {} + + @staticmethod + def openshift_available_disk(ansible_mounts): + """Determine the available disk space for an OpenShift installation. + + ansible_mounts should be a list of dicts like the 'setup' Ansible module + returns. + """ + # priority list in descending order + supported_mnt_paths = ["/var", "/"] + available_mnts = {mnt.get("mount"): mnt for mnt in ansible_mounts} + + try: + for path in supported_mnt_paths: + if path in available_mnts: + return available_mnts[path]["size_available"] + except KeyError: + pass + + paths = ''.join(sorted(available_mnts)) or 'none' + msg = "Unable to determine available disk space. Paths mounted: {}.".format(paths) + raise OpenShiftCheckException(msg) |