Same issue here.  Adding haveged reduced the error count, but still failed with 2 processors and 2gb. 3 processors and 3gb failed with a network error 

[24/28]: migrating certificate profiles to LDAP
  [error] NetworkError: cannot connect to 'https://directory1.ri.mamabosso.com:8443/ca/rest/account/logout': [Errno 104] Connection reset by peer
ipapython.admintool: ERROR    cannot connect to 'https://XXXXXXXXXXXXXXXXXX.com:8443/ca/rest/account/logout': [Errno 104] Connection reset by peer
ipapython.admintool: ERROR    The ipa-server-install command failed. See /var/log/ipaserver-install.log for more information

4gb and 4 processors:  CPU usage 100$ after 10/28 was printed. (requesting RA cert..)

Usage at 100% through step 21 (restarting cert server), and.. 24 migrating cert profiles...(where it failed before)... 55% cpu usage.. 37%... 43%... 64%... 87%... 73%... and failed again:

  [24/28]: migrating certificate profiles to LDAP
  [error] NetworkError: cannot connect to 'https://directory1.ri.mamabosso.com:8443/ca/rest/account/logout': [Errno 111] Connection refused
ipapython.admintool: ERROR    cannot connect to 'https://XXXXXXXXXXXXXXX.com:8443/ca/rest/account/logout': [Errno 111] Connection refused
ipapython.admintool: ERROR    The ipa-server-install command failed. See /var/log/ipaserver-install.log for more information

from the log:

2018-06-21T15:49:02Z DEBUG request POST https://directory1.ri.mamabosso.com:8443/ca/rest/profiles/raw
2018-06-21T15:49:02Z DEBUG request body "desc=This certificate profile is for ...

2018-06-21T15:49:02Z DEBUG httplib request failed:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/ipapython/dogtag.py", line 220, in _httplib_request
    conn.request(method, uri, body=request_body, headers=headers)
  File "/usr/lib/python2.7/httplib.py", line 1042, in request
    self._send_request(method, url, body, headers)
  File "/usr/lib/python2.7/httplib.py", line 1082, in _send_request
    self.endheaders(body)
  File "/usr/lib/python2.7/httplib.py", line 1038, in endheaders
    self._send_output(message_body)
  File "/usr/lib/python2.7/httplib.py", line 882, in _send_output
    self.send(msg)
  File "/usr/lib/python2.7/httplib.py", line 844, in send
    self.connect()
  File "/usr/lib/python2.7/httplib.py", line 1263, in connect
    server_hostname=server_hostname)
  File "/usr/lib/python2.7/ssl.py", line 369, in wrap_socket
    _context=self)
  File "/usr/lib/python2.7/ssl.py", line 617, in __init__
    self.do_handshake()
  File "/usr/lib/python2.7/ssl.py", line 846, in do_handshake
    self._sslobj.do_handshake()
error: [Errno 104] Connection reset by peer
2018-06-21T15:49:02Z DEBUG request GET https://directory1.ri.mamabosso.com:8443/ca/rest/account/logout
2018-06-21T15:49:02Z DEBUG request body ''
2018-06-21T15:49:02Z DEBUG httplib request failed:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/ipapython/dogtag.py", line 220, in _httplib_request
    conn.request(method, uri, body=request_body, headers=headers)
  File "/usr/lib/python2.7/httplib.py", line 1042, in request
    self._send_request(method, url, body, headers)
  File "/usr/lib/python2.7/httplib.py", line 1082, in _send_request
    self.endheaders(body)
  File "/usr/lib/python2.7/httplib.py", line 1038, in endheaders
    self._send_output(message_body)
  File "/usr/lib/python2.7/httplib.py", line 882, in _send_output
    self.send(msg)
  File "/usr/lib/python2.7/httplib.py", line 844, in send
    self.connect()
  File "/usr/lib/python2.7/httplib.py", line 1255, in connect
    HTTPConnection.connect(self)
  File "/usr/lib/python2.7/httplib.py", line 821, in connect
    self.timeout, self.source_address)
  File "/usr/lib/python2.7/socket.py", line 575, in create_connection
    raise err
error: [Errno 111] Connection refused
2018-06-21T15:49:02Z DEBUG Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/ipaserver/install/service.py", line 555, in start_creation
    run_step(full_msg, method)
  File "/usr/lib/python2.7/dist-packages/ipaserver/install/service.py", line 541, in run_step
    method()
  File "/usr/lib/python2.7/dist-packages/ipaserver/install/cainstance.py", line 1790, in migrate_profiles_to_ldap
    _create_dogtag_profile(profile_id, profile_data, overwrite=False)
  File "/usr/lib/python2.7/dist-packages/ipaserver/install/cainstance.py", line 1823, in _create_dogtag_profile
    profile_id)
  File "/usr/lib/python2.7/dist-packages/ipaserver/plugins/dogtag.py", line 1312, in __exit__
    method='GET'
  File "/usr/lib/python2.7/dist-packages/ipapython/dogtag.py", line 167, in https_request
    method=method, headers=headers)
  File "/usr/lib/python2.7/dist-packages/ipapython/dogtag.py", line 229, in _httplib_request
    raise NetworkError(uri=uri, error=str(e))
NetworkError: cannot connect to 'https://directory1.ri.mamabosso.com:8443/ca/rest/account/logout': [Errno 111] Connection refused

2018-06-21T15:49:02Z DEBUG   [error] NetworkError: cannot connect to 'https://directory1.ri.mamabosso.com:8443/ca/rest/account/logout': [Errno 111] Connection refused
2018-06-21T15:49:02Z DEBUG   File "/usr/lib/python2.7/dist-packages/ipapython/admintool.py", line 174, in execute
    return_value = self.run()
  File "/usr/lib/python2.7/dist-packages/ipapython/install/cli.py", line 319, in run
    return cfgr.run()
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 364, in run
    return self.execute()
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 389, in execute
    for rval in self._executor():
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 434, in __runner
    exc_handler(exc_info)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 463, in _handle_execute_exception
    self._handle_exception(exc_info)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 453, in _handle_exception
    six.reraise(*exc_info)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 424, in __runner
    step()
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 421, in <lambda>
    step = lambda: next(self.__gen)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/util.py", line 81, in run_generator_with_yield_from
    six.reraise(*exc_info)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/util.py", line 59, in run_generator_with_yield_from
    value = gen.send(prev_value)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 658, in _configure
    next(executor)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 434, in __runner
    exc_handler(exc_info)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 463, in _handle_execute_exception
    self._handle_exception(exc_info)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 521, in _handle_exception
    self.__parent._handle_exception(exc_info)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 453, in _handle_exception
    six.reraise(*exc_info)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 518, in _handle_exception
    super(ComponentBase, self)._handle_exception(exc_info)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 453, in _handle_exception
    six.reraise(*exc_info)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 424, in __runner
    step()
  File "/usr/lib/python2.7/dist-packages/ipapython/install/core.py", line 421, in <lambda>
    step = lambda: next(self.__gen)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/util.py", line 81, in run_generator_with_yield_from
    six.reraise(*exc_info)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/util.py", line 59, in run_generator_with_yield_from
    value = gen.send(prev_value)
  File "/usr/lib/python2.7/dist-packages/ipapython/install/common.py", line 65, in _install
    for unused in self._installer(self.parent):
  File "/usr/lib/python2.7/dist-packages/ipaserver/install/server/__init__.py", line 581, in main
    master_install(self)
  File "/usr/lib/python2.7/dist-packages/ipaserver/install/server/install.py", line 252, in decorated
    func(installer)
  File "/usr/lib/python2.7/dist-packages/ipaserver/install/server/install.py", line 838, in install
    ca.install_step_0(False, None, options)
  File "/usr/lib/python2.7/dist-packages/ipaserver/install/ca.py", line 326, in install_step_0
    use_ldaps=standalone)
  File "/usr/lib/python2.7/dist-packages/ipaserver/install/cainstance.py", line 473, in configure_instance
    self.start_creation(runtime=runtime)
  File "/usr/lib/python2.7/dist-packages/ipaserver/install/service.py", line 555, in start_creation
    run_step(full_msg, method)
  File "/usr/lib/python2.7/dist-packages/ipaserver/install/service.py", line 541, in run_step
    method()
  File "/usr/lib/python2.7/dist-packages/ipaserver/install/cainstance.py", line 1790, in migrate_profiles_to_ldap
    _create_dogtag_profile(profile_id, profile_data, overwrite=False)
  File "/usr/lib/python2.7/dist-packages/ipaserver/install/cainstance.py", line 1823, in _create_dogtag_profile
    profile_id)
  File "/usr/lib/python2.7/dist-packages/ipaserver/plugins/dogtag.py", line 1312, in __exit__
    method='GET'
  File "/usr/lib/python2.7/dist-packages/ipapython/dogtag.py", line 167, in https_request
    method=method, headers=headers)
  File "/usr/lib/python2.7/dist-packages/ipapython/dogtag.py", line 229, in _httplib_request
    raise NetworkError(uri=uri, error=str(e))
2018-06-21T15:49:02Z DEBUG The ipa-server-install command failed,...