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authorJason DeTiberus <detiber@gmail.com>2015-11-06 10:59:58 -0500
committerJason DeTiberus <detiber@gmail.com>2015-11-06 10:59:58 -0500
commite5cafe3da31848e12568a6fbd79dfd2193bb72e7 (patch)
treedd444fa5401e4448b37e583e9a16858e356ddbff /playbooks/adhoc
parent77228623b9c96682b44056f07a933ab2d60d5041 (diff)
parent98b69946496d0b214c5bd0d384e1cea0856c4cbb (diff)
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Merge pull request #50 from dgoodwin/pre-upgrade
Run pre-upgrade script on nodes
Diffstat (limited to 'playbooks/adhoc')
-rw-r--r--playbooks/adhoc/upgrades/files/pre-upgrade-check185
-rw-r--r--playbooks/adhoc/upgrades/upgrade.yml7
2 files changed, 192 insertions, 0 deletions
diff --git a/playbooks/adhoc/upgrades/files/pre-upgrade-check b/playbooks/adhoc/upgrades/files/pre-upgrade-check
new file mode 100644
index 000000000..c8ecae399
--- /dev/null
+++ b/playbooks/adhoc/upgrades/files/pre-upgrade-check
@@ -0,0 +1,185 @@
+#!/usr/bin/env python
+"""
+Pre-upgrade checks that must be run on a master before proceeding with upgrade.
+"""
+# This is a script not a python module:
+# pylint: disable=invalid-name
+
+# NOTE: This script should not require any python libs other than what is
+# in the standard library.
+
+__license__ = "ASL 2.0"
+
+import json
+import os
+import subprocess
+import re
+
+# The maximum length of container.ports.name
+ALLOWED_LENGTH = 15
+# The valid structure of container.ports.name
+ALLOWED_CHARS = re.compile('^[a-z0-9][a-z0-9\\-]*[a-z0-9]$')
+AT_LEAST_ONE_LETTER = re.compile('[a-z]')
+# look at OS_PATH for the full path. Default ot 'oc'
+OC_PATH = os.getenv('OC_PATH', 'oc')
+
+
+def validate(value):
+ """
+ validate verifies that value matches required conventions
+
+ Rules of container.ports.name validation:
+
+ * must be less that 16 chars
+ * at least one letter
+ * only a-z0-9-
+ * hyphens can not be leading or trailing or next to each other
+
+ :Parameters:
+ - `value`: Value to validate
+ """
+ if len(value) > ALLOWED_LENGTH:
+ return False
+
+ if '--' in value:
+ return False
+
+ # We search since it can be anywhere
+ if not AT_LEAST_ONE_LETTER.search(value):
+ return False
+
+ # We match because it must start at the beginning
+ if not ALLOWED_CHARS.match(value):
+ return False
+ return True
+
+
+def list_items(kind):
+ """
+ list_items returns a list of items from the api
+
+ :Parameters:
+ - `kind`: Kind of item to access
+ """
+ response = subprocess.check_output([OC_PATH, 'get', '--all-namespaces', '-o', 'json', kind])
+ items = json.loads(response)
+ return items.get("items", [])
+
+
+def get(obj, *paths):
+ """
+ Gets an object
+
+ :Parameters:
+ - `obj`: A dictionary structure
+ - `path`: All other non-keyword arguments
+ """
+ ret_obj = obj
+ for path in paths:
+ if ret_obj.get(path, None) is None:
+ return []
+ ret_obj = ret_obj[path]
+ return ret_obj
+
+
+# pylint: disable=too-many-arguments
+def pretty_print_errors(namespace, kind, item_name, container_name, port_name, valid):
+ """
+ Prints out results in human friendly way.
+
+ :Parameters:
+ - `namespace`: Namespace of the resource
+ - `kind`: Kind of the resource
+ - `item_name`: Name of the resource
+ - `container_name`: Name of the container. May be "" when kind=Service.
+ - `port_name`: Name of the port
+ - `valid`: True if the port is valid
+ """
+ if not valid:
+ if len(container_name) > 0:
+ print('%s/%s -n %s (Container="%s" Port="%s")' % (
+ kind, item_name, namespace, container_name, port_name))
+ else:
+ print('%s/%s -n %s (Port="%s")' % (
+ kind, item_name, namespace, port_name))
+
+
+def print_validation_header():
+ """
+ Prints the error header. Should run on the first error to avoid
+ overwhelming the user.
+ """
+ print """\
+At least one port name does not validate. Valid port names:
+
+ * must be less that 16 chars
+ * have at least one letter
+ * only a-z0-9-
+ * do not start or end with -
+ * Dashes may not be next to eachother ('--')
+"""
+
+
+def main():
+ """
+ main is the main entry point to this script
+ """
+ try:
+ # the comma at the end suppresses the newline
+ print "Checking for oc ...",
+ subprocess.check_output([OC_PATH, 'whoami'])
+ print "found"
+ except:
+ print(
+ 'Can not find oc (%s). Override the path with the '
+ 'OC_PATH environment variable. Exiting...' % OC_PATH)
+ raise SystemExit(1)
+
+ # Where the magic happens
+ first_error = True
+ for kind, path in [
+ ('replicationcontrollers', ("spec", "template", "spec", "containers")),
+ ('pods', ("spec", "containers")),
+ ('deploymentconfigs', ("spec", "template", "spec", "containers"))]:
+ for item in list_items(kind):
+ namespace = item["metadata"]["namespace"]
+ item_name = item["metadata"]["name"]
+ for container in get(item, *path):
+ container_name = container["name"]
+ for port in get(container, "ports"):
+ port_name = port.get("name", None)
+ if not port_name:
+ # Unnamed ports are OK
+ continue
+ valid = validate(port_name)
+ if not valid and first_error:
+ first_error = False
+ print_validation_header()
+ pretty_print_errors(
+ namespace, kind, item_name,
+ container_name, port_name, valid)
+
+ # Services follow a different flow
+ for item in list_items('services'):
+ namespace = item["metadata"]["namespace"]
+ item_name = item["metadata"]["name"]
+ for port in get(item, "spec", "ports"):
+ port_name = port.get("targetPort", None)
+ if isinstance(port_name, int) or port_name is None:
+ # Integer only or unnamed ports are OK
+ continue
+ valid = validate(port_name)
+ if not valid and first_error:
+ first_error = False
+ print_validation_header()
+ pretty_print_errors(
+ namespace, "services", item_name, "", port_name, valid)
+
+ # If we had at least 1 error then exit with 1
+ if not first_error:
+ raise SystemExit(1)
+
+
+if __name__ == '__main__':
+ main()
+
diff --git a/playbooks/adhoc/upgrades/upgrade.yml b/playbooks/adhoc/upgrades/upgrade.yml
index e807d3fa8..dab0195ac 100644
--- a/playbooks/adhoc/upgrades/upgrade.yml
+++ b/playbooks/adhoc/upgrades/upgrade.yml
@@ -18,6 +18,13 @@
- fail: msg="openshift_master_cluster_method must be set to 'pacemaker'"
when: openshift_master_ha | bool and ((openshift_master_cluster_method is not defined) or (openshift_master_cluster_method is defined and openshift_master_cluster_method != "pacemaker"))
+- name: Run pre-upgrade checks on first master
+ hosts: masters[0]
+ tasks:
+ # If this script errors out ansible will show the default stdout/stderr
+ # which contains details for the user:
+ - script: files/pre-upgrade-check
+
- name: Evaluate etcd_hosts
hosts: localhost
tasks: