From 3e8427f3aa392f961923f5c9d509bab64ce3c9ab Mon Sep 17 00:00:00 2001 From: Christian Heimes Date: Sun, 8 Jul 2018 11:53:58 +0200 Subject: [PATCH] Auto-retry failed certmonger requests During parallel replica installation, a request sometimes fails with CA_REJECTED or CA_UNREACHABLE. The error occur when the master is either busy or some information haven't been replicated yet. Even a stuck request can be recovered, e.g. when permission and group information have been replicated. A new function request_and_retry_cert() automatically resubmits failing requests until it times out. Fixes: https://pagure.io/freeipa/issue/7623 Signed-off-by: Christian Heimes Reviewed-By: Stanislav Laznicka --- ipalib/install/certmonger.py | 64 ++++++++++++++++++++++++------- ipaserver/install/cainstance.py | 4 +- ipaserver/install/certs.py | 19 ++++++--- ipaserver/install/dsinstance.py | 4 +- ipaserver/install/httpinstance.py | 5 ++- ipaserver/install/krbinstance.py | 4 +- 6 files changed, 76 insertions(+), 24 deletions(-) diff --git a/ipalib/install/certmonger.py b/ipalib/install/certmonger.py index c07242412affa29eca3312fd27985f65869d3f7a..3e1862192eb0d9245797ebbe8abf2ff69d7e7767 100644 --- a/ipalib/install/certmonger.py +++ b/ipalib/install/certmonger.py @@ -305,20 +305,56 @@ def add_subject(request_id, subject): def request_and_wait_for_cert( certpath, subject, principal, nickname=None, passwd_fname=None, dns=None, ca='IPA', profile=None, - pre_command=None, post_command=None, storage='NSSDB', perms=None): - """ - Execute certmonger to request a server certificate. - - The method also waits for the certificate to be available. - """ - reqId = request_cert(certpath, subject, principal, nickname, - passwd_fname, dns, ca, profile, - pre_command, post_command, storage, perms) - state = wait_for_request(reqId, api.env.startup_timeout) - ca_error = get_request_value(reqId, 'ca-error') - if state != 'MONITORING' or ca_error: - raise RuntimeError("Certificate issuance failed ({})".format(state)) - return reqId + pre_command=None, post_command=None, storage='NSSDB', perms=None, + resubmit_timeout=0): + """Request certificate, wait and possibly resubmit failing requests + + Submit a cert request to certmonger and wait until the request has + finished. + + With timeout, a failed request is resubmitted. During parallel replica + installation, a request sometimes fails with CA_REJECTED or + CA_UNREACHABLE. The error occurs when the master is either busy or some + information haven't been replicated yet. Even a stuck request can be + recovered, e.g. when permission and group information have been + replicated. + """ + req_id = request_cert( + certpath, subject, principal, nickname, passwd_fname, dns, ca, + profile, pre_command, post_command, storage, perms + ) + + deadline = time.time() + resubmit_timeout + while True: # until success, timeout, or error + state = wait_for_request(req_id, api.env.replication_wait_timeout) + ca_error = get_request_value(req_id, 'ca-error') + if state == 'MONITORING' and ca_error is None: + # we got a winner, exiting + logger.debug("Cert request %s was successful", req_id) + return req_id + + logger.debug( + "Cert request %s failed: %s (%s)", req_id, state, ca_error + ) + if state not in {'CA_REJECTED', 'CA_UNREACHABLE'}: + # probably unrecoverable error + logger.debug("Giving up on cert request %s", req_id) + break + elif not resubmit_timeout: + # no resubmit + break + elif time.time() > deadline: + logger.debug("Request %s reached resubmit dead line", req_id) + break + else: + # sleep and resubmit + logger.debug("Sleep and resubmit cert request %s", req_id) + time.sleep(10) + resubmit_request(req_id) + + raise RuntimeError( + "Certificate issuance failed ({}: {})".format(state, ca_error) + ) def request_cert( diff --git a/ipaserver/install/cainstance.py b/ipaserver/install/cainstance.py index 8193f3da854b3a20d175de523fbc453f5c5104d8..6dbf69b3e5833f220a4d7d640b66a8fcf824f445 100644 --- a/ipaserver/install/cainstance.py +++ b/ipaserver/install/cainstance.py @@ -917,7 +917,9 @@ class CAInstance(DogtagInstance): profile='caServerCert', pre_command='renew_ra_cert_pre', post_command='renew_ra_cert', - storage="FILE") + storage="FILE", + resubmit_timeout=api.env.replication_wait_timeout + ) self.__set_ra_cert_perms() self.requestId = str(reqId) diff --git a/ipaserver/install/certs.py b/ipaserver/install/certs.py index 3f843399f4f964223f52242d610e842a5dc473e8..30b2aa0d3e7b2cafbcc17ad3d04764a342ae8002 100644 --- a/ipaserver/install/certs.py +++ b/ipaserver/install/certs.py @@ -600,12 +600,19 @@ class CertDB(object): def export_pem_cert(self, nickname, location): return self.nssdb.export_pem_cert(nickname, location) - def request_service_cert(self, nickname, principal, host): - certmonger.request_and_wait_for_cert(certpath=self.secdir, - nickname=nickname, - principal=principal, - subject=host, - passwd_fname=self.passwd_fname) + def request_service_cert(self, nickname, principal, host, + resubmit_timeout=None): + if resubmit_timeout is None: + resubmit_timeout = api.env.replication_wait_timeout + return certmonger.request_and_wait_for_cert( + certpath=self.secdir, + storage='NSSDB', + nickname=nickname, + principal=principal, + subject=host, + passwd_fname=self.passwd_fname, + resubmit_timeout=resubmit_timeout + ) def is_ipa_issued_cert(self, api, nickname): """ diff --git a/ipaserver/install/dsinstance.py b/ipaserver/install/dsinstance.py index eefbde3356e1077d490d09c4ea47d961ce3ce8e6..ac95f8c746477da375de518526dea0d02d51d984 100644 --- a/ipaserver/install/dsinstance.py +++ b/ipaserver/install/dsinstance.py @@ -851,7 +851,9 @@ class DsInstance(service.Service): ca='IPA', profile=dogtag.DEFAULT_PROFILE, dns=[self.fqdn], - post_command=cmd) + post_command=cmd, + resubmit_timeout=api.env.replication_wait_timeout + ) finally: if prev_helper is not None: certmonger.modify_ca_helper('IPA', prev_helper) diff --git a/ipaserver/install/httpinstance.py b/ipaserver/install/httpinstance.py index 0b7023c2f1b0feb996e0dd0adbefbd49c51da757..3f83248dd89118aeecfbf458c5079dde8b2cb93d 100644 --- a/ipaserver/install/httpinstance.py +++ b/ipaserver/install/httpinstance.py @@ -447,7 +447,10 @@ class HTTPInstance(service.Service): ca='IPA', profile=dogtag.DEFAULT_PROFILE, dns=[self.fqdn], - post_command='restart_httpd') + post_command='restart_httpd', + storage='NSSDB', + resubmit_timeout=api.env.replication_wait_timeout + ) finally: if prev_helper is not None: certmonger.modify_ca_helper('IPA', prev_helper) diff --git a/ipaserver/install/krbinstance.py b/ipaserver/install/krbinstance.py index 33d66fb94b0a1f7571b22120e5159a0e0ad2e675..09cafb7b84623594fe88083f5b914cee0f050409 100644 --- a/ipaserver/install/krbinstance.py +++ b/ipaserver/install/krbinstance.py @@ -445,7 +445,9 @@ class KrbInstance(service.Service): storage='FILE', profile=KDC_PROFILE, post_command='renew_kdc_cert', - perms=(0o644, 0o600)) + perms=(0o644, 0o600), + resubmit_timeout=api.env.replication_wait_timeout + ) except dbus.DBusException as e: # if the certificate is already tracked, ignore the error name = e.get_dbus_name() -- 2.17.1