Pro Tip: do not run the server in any language except "c".
(crmsh cluster init will not find your interfaces if language is German )

I can ping the nodes from each other.
Password less ssh is working.

# LANG=c crm -d cluster init node1
ends with "ERROR: cluster.init: No JSON object could be decoded"

Code:
OK: Install packages
Generate corosync authkey...
DEBUG: parallax.copy([], /tmp/crm-tmp-59688c9dd0fa5d2b476a/script.input, /tmp/crm-tmp-59688c9dd0fa5d2b476a/script.input)
DEBUG: is_local (None): True
** node1 - cd "/tmp/crm-tmp-59688c9dd0fa5d2b476a"; ./authkey.py
DEBUG: Result(local): ''
DEBUG: parallax.call([], if [ -f '/tmp/crm-tmp-59688c9dd0fa5d2b476a/crm_script.debug' ]; then cat '/tmp/crm-tmp-59688c9dd0fa5d2b476a/crm_script.debug'; fi)
OK: [('node1', None, None)]: crm_script(call): ['/usr/bin/systemctl', 'start', 'sshd.service']
crm_script(call): ['mkdir', '-m', '700', '-p', '/root/.ssh']
crm_script(call): ['./crm_rpmcheck.py', 'booth', 'cluster-glue', 'corosync', 'crmsh', 'csync2', 'drbd', 'fence-agents', 'gfs2', 'gfs2-utils', 'hawk', 'ocfs2', 'ocfs2-tools', 'pacemaker', 'pacemaker-mgmt', 'resource-agents', 'sbd']
crm_script(call): ['/usr/bin/systemctl', 'is-enabled', 'sshd.service']
crm_script(call): ['/usr/bin/systemctl', 'is-active', 'sshd.service']
crm_script(call): ['/usr/bin/systemctl', 'is-enabled', 'ntp.service']
crm_script(call): ['/usr/bin/systemctl', 'is-enabled', 'corosync.service']
crm_script(call): ['/usr/bin/systemctl', 'is-active', 'corosync.service']
crm_script(call): ['/usr/bin/systemctl', 'is-enabled', 'pacemaker.service']
crm_script(call): ['/usr/bin/systemctl', 'is-active', 'pacemaker.service']
crm_script(call): ['/usr/bin/systemctl', 'is-enabled', 'hawk.service']
crm_script(call): ['/usr/bin/systemctl', 'is-enabled', 'SuSEfirewall2_init.service']
crm_script(call): ['/usr/bin/systemctl', 'is-active', 'SuSEfirewall2_init.service']
crm_script(call): ['netstat', '-nr']
crm_script(call): grep -r corosync.conf /etc/logrotate.d
crm_script(call): ['df']
crm_script(call): ['./crm_pkg.py', '-n', 'cluster-glue', '-s', 'latest']
crm_script(call): ['./crm_pkg.py', '-n', 'corosync', '-s', 'latest']
crm_script(call): ['./crm_pkg.py', '-n', 'crmsh', '-s', 'latest']
crm_script(call): ['./crm_pkg.py', '-n', 'pacemaker', '-s', 'latest']
crm_script(call): ['./crm_pkg.py', '-n', 'resource-agents', '-s', 'latest']
crm_script(call): ['/usr/bin/systemctl', 'is-enabled', 'SuSEfirewall2.service']
crm_script(call): ['/usr/bin/systemctl', 'is-active', 'SuSEfirewall2.service']
crm_script(call): ['/usr/bin/systemctl', 'is-enabled', 'SuSEfirewall2.service']
crm_script(call): ['/usr/bin/systemctl', 'is-active', 'SuSEfirewall2.service']
crm_script(call): ['/usr/bin/systemctl', 'restart', 'SuSEfirewall2.service']
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/crmsh/ui_context.py", line 75, in run
    rv = self.execute_command() is not False
  File "/usr/lib/python2.7/site-packages/crmsh/ui_context.py", line 245, in execute_command
    rv = self.command_info.function(*arglist)
  File "/usr/lib/python2.7/site-packages/crmsh/ui_cluster.py", line 110, in do_init
    return scripts.run(script, script_args(args), script_printer())
  File "/usr/lib/python2.7/site-packages/crmsh/scripts.py", line 2049, in run
    return runner.all_actions()
  File "/usr/lib/python2.7/site-packages/crmsh/scripts.py", line 1766, in all_actions
    if not self._run_action(action):
  File "/usr/lib/python2.7/site-packages/crmsh/scripts.py", line 1852, in _run_action
    method(Actions(self, action))
  File "/usr/lib/python2.7/site-packages/crmsh/scripts.py", line 280, in apply_local
    self._run.run_command(None, self._value, True)
  File "/usr/lib/python2.7/site-packages/crmsh/scripts.py", line 1787, in run_command
    self.call(nodes, cmdline, is_json_output)
  File "/usr/lib/python2.7/site-packages/crmsh/scripts.py", line 1879, in call
    self.result = self._process_local(cmdline, is_json_output)
  File "/usr/lib/python2.7/site-packages/crmsh/scripts.py", line 1998, in _process_local
    out = json.loads(out)
  File "/usr/lib64/python2.7/json/__init__.py", line 338, in loads
    return _default_decoder.decode(s)
  File "/usr/lib64/python2.7/json/decoder.py", line 366, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib64/python2.7/json/decoder.py", line 384, in raw_decode
    raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded
ERROR: cluster.init: No JSON object could be decoded