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authorjuanvallejo <jvallejo@redhat.com>2017-06-06 12:41:49 -0400
committerjuanvallejo <jvallejo@redhat.com>2017-08-02 09:54:06 -0400
commitfc905cf14bbfc75e25a0a58fdb3c92f602ce9450 (patch)
tree41564f655bf5d553bfc03546074a9d94014753fc
parentbf0bf407479458206f48885e43d3e1d3a2eab6e1 (diff)
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add pre-flight checks to ugrade path
-rw-r--r--playbooks/common/openshift-cluster/upgrades/pre/verify_health_checks.yml13
-rw-r--r--playbooks/common/openshift-cluster/upgrades/v3_6/upgrade.yml4
-rw-r--r--roles/openshift_health_checker/openshift_checks/disk_availability.py34
-rw-r--r--roles/openshift_health_checker/test/disk_availability_test.py69
4 files changed, 115 insertions, 5 deletions
diff --git a/playbooks/common/openshift-cluster/upgrades/pre/verify_health_checks.yml b/playbooks/common/openshift-cluster/upgrades/pre/verify_health_checks.yml
new file mode 100644
index 000000000..497709d25
--- /dev/null
+++ b/playbooks/common/openshift-cluster/upgrades/pre/verify_health_checks.yml
@@ -0,0 +1,13 @@
+---
+- name: Verify Host Requirements
+ hosts: oo_all_hosts
+ roles:
+ - openshift_health_checker
+ vars:
+ - r_openshift_health_checker_playbook_context: upgrade
+ post_tasks:
+ - action: openshift_health_check
+ args:
+ checks:
+ - disk_availability
+ - memory_availability
diff --git a/playbooks/common/openshift-cluster/upgrades/v3_6/upgrade.yml b/playbooks/common/openshift-cluster/upgrades/v3_6/upgrade.yml
index 5b9ac9e8f..da4444867 100644
--- a/playbooks/common/openshift-cluster/upgrades/v3_6/upgrade.yml
+++ b/playbooks/common/openshift-cluster/upgrades/v3_6/upgrade.yml
@@ -70,6 +70,10 @@
# docker is configured and running.
skip_docker_role: True
+- include: ../pre/verify_health_checks.yml
+ tags:
+ - pre_upgrade
+
- include: ../pre/verify_control_plane_running.yml
tags:
- pre_upgrade
diff --git a/roles/openshift_health_checker/openshift_checks/disk_availability.py b/roles/openshift_health_checker/openshift_checks/disk_availability.py
index 283461294..39ac0e4ec 100644
--- a/roles/openshift_health_checker/openshift_checks/disk_availability.py
+++ b/roles/openshift_health_checker/openshift_checks/disk_availability.py
@@ -35,6 +35,15 @@ class DiskAvailability(OpenShiftCheck):
},
}
+ # recommended disk space for each location under an upgrade context
+ recommended_disk_upgrade_bytes = {
+ '/var': {
+ 'masters': 10 * 10**9,
+ 'nodes': 5 * 10 ** 9,
+ 'etcd': 5 * 10 ** 9,
+ },
+ }
+
def is_active(self):
"""Skip hosts that do not have recommended disk space requirements."""
group_names = self.get_var("group_names", default=[])
@@ -80,9 +89,34 @@ class DiskAvailability(OpenShiftCheck):
config_bytes = max(config.get(name, 0) for name in group_names) * 10**9
recommended_bytes = config_bytes or recommended_bytes
+ # if an "upgrade" context is set, update the minimum disk requirement
+ # as this signifies an in-place upgrade - the node might have the
+ # required total disk space, but some of that space may already be
+ # in use by the existing OpenShift deployment.
+ context = self.get_var("r_openshift_health_checker_playbook_context", default="")
+ if context == "upgrade":
+ recommended_upgrade_paths = self.recommended_disk_upgrade_bytes.get(path, {})
+ if recommended_upgrade_paths:
+ recommended_bytes = config_bytes or max(recommended_upgrade_paths.get(name, 0)
+ for name in group_names)
+
if free_bytes < recommended_bytes:
free_gb = float(free_bytes) / 10**9
recommended_gb = float(recommended_bytes) / 10**9
+ msg = (
+ 'Available disk space in "{}" ({:.1f} GB) '
+ 'is below minimum recommended ({:.1f} GB)'
+ ).format(path, free_gb, recommended_gb)
+
+ # warn if check failed under an "upgrade" context
+ # due to limits imposed by the user config
+ if config_bytes and context == "upgrade":
+ msg += ('\n\nMake sure to account for decreased disk space during an upgrade\n'
+ 'due to an existing OpenShift deployment. Please check the value of\n'
+ ' openshift_check_min_host_disk_gb={}\n'
+ 'in your Ansible inventory, and lower the recommended disk space availability\n'
+ 'if necessary for this upgrade.').format(config_bytes)
+
return {
'failed': True,
'msg': (
diff --git a/roles/openshift_health_checker/test/disk_availability_test.py b/roles/openshift_health_checker/test/disk_availability_test.py
index e98d02c58..5720eeacf 100644
--- a/roles/openshift_health_checker/test/disk_availability_test.py
+++ b/roles/openshift_health_checker/test/disk_availability_test.py
@@ -97,8 +97,9 @@ def test_succeeds_with_recommended_disk_space(group_names, configured_min, ansib
assert not result.get('failed', False)
-@pytest.mark.parametrize('group_names,configured_min,ansible_mounts,extra_words', [
+@pytest.mark.parametrize('name,group_names,configured_min,ansible_mounts,extra_words', [
(
+ 'test with no space available',
['masters'],
0,
[{
@@ -108,6 +109,7 @@ def test_succeeds_with_recommended_disk_space(group_names, configured_min, ansib
['0.0 GB'],
),
(
+ 'test with a higher configured required value',
['masters'],
100, # set a higher threshold
[{
@@ -117,6 +119,7 @@ def test_succeeds_with_recommended_disk_space(group_names, configured_min, ansib
['100.0 GB'],
),
(
+ 'test with 1GB available, but "0" GB space requirement',
['nodes'],
0,
[{
@@ -126,6 +129,7 @@ def test_succeeds_with_recommended_disk_space(group_names, configured_min, ansib
['1.0 GB'],
),
(
+ 'test with no space available, but "0" GB space requirement',
['etcd'],
0,
[{
@@ -135,16 +139,17 @@ def test_succeeds_with_recommended_disk_space(group_names, configured_min, ansib
['0.0 GB'],
),
(
+ 'test with enough space for a node, but not for a master',
['nodes', 'masters'],
0,
[{
'mount': '/',
- # enough space for a node, not enough for a master
'size_available': 15 * 10**9 + 1,
}],
['15.0 GB'],
),
(
+ 'test failure with enough space on "/", but not enough on "/var"',
['etcd'],
0,
[{
@@ -158,8 +163,8 @@ def test_succeeds_with_recommended_disk_space(group_names, configured_min, ansib
}],
['0.0 GB'],
),
-])
-def test_fails_with_insufficient_disk_space(group_names, configured_min, ansible_mounts, extra_words):
+], ids=lambda argval: argval[0])
+def test_fails_with_insufficient_disk_space(name, group_names, configured_min, ansible_mounts, extra_words):
task_vars = dict(
group_names=group_names,
openshift_check_min_host_disk_gb=configured_min,
@@ -170,7 +175,61 @@ def test_fails_with_insufficient_disk_space(group_names, configured_min, ansible
assert result['failed']
for word in 'below recommended'.split() + extra_words:
- assert word in result['msg']
+ assert word in result.get('msg', '')
+
+
+@pytest.mark.parametrize('name,group_names,context,ansible_mounts,failed,extra_words', [
+ (
+ 'test without enough space for master under "upgrade" context',
+ ['nodes', 'masters'],
+ "upgrade",
+ [{
+ 'mount': '/',
+ 'size_available': 1 * 10**9 + 1,
+ 'size_total': 21 * 10**9 + 1,
+ }],
+ True,
+ ["1.0 GB"],
+ ),
+ (
+ 'test with enough space for master under "upgrade" context',
+ ['nodes', 'masters'],
+ "upgrade",
+ [{
+ 'mount': '/',
+ 'size_available': 10 * 10**9 + 1,
+ 'size_total': 21 * 10**9 + 1,
+ }],
+ False,
+ [],
+ ),
+ (
+ 'test with not enough space for master, and non-upgrade context',
+ ['nodes', 'masters'],
+ "health",
+ [{
+ 'mount': '/',
+ # not enough space for a master,
+ # "health" context should not lower requirement
+ 'size_available': 20 * 10**9 + 1,
+ }],
+ True,
+ ["20.0 GB", "below minimum"],
+ ),
+], ids=lambda argval: argval[0])
+def test_min_required_space_changes_with_upgrade_context(name, group_names, context, ansible_mounts, failed, extra_words):
+ task_vars = dict(
+ r_openshift_health_checker_playbook_context=context,
+ group_names=group_names,
+ ansible_mounts=ansible_mounts,
+ )
+
+ check = DiskAvailability(fake_execute_module, task_vars)
+ result = check.run()
+
+ assert result.get("failed", False) == failed
+ for word in extra_words:
+ assert word in result.get('msg', '')
def fake_execute_module(*args):