podspec needs to be truncated to log because it could be a very long str

[ycliuhw]

podspec needs to be truncated to log because it could be a very long str.

2018-08-31 03:24:11 ERROR juju-log redis:0: Hook error:
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/dist-packages/charms/reactive/__init__.py", line 73, in main
    bus.dispatch(restricted=restricted_mode)
  File "/usr/local/lib/python3.6/dist-packages/charms/reactive/bus.py", line 382, in dispatch
    _invoke(other_handlers)
  File "/usr/local/lib/python3.6/dist-packages/charms/reactive/bus.py", line 358, in _invoke
    handler.invoke()
  File "/usr/local/lib/python3.6/dist-packages/charms/reactive/bus.py", line 180, in invoke
    self._action(*args)
  File "/var/lib/juju/agents/unit-kubeflow-seldon-cluster-manager-0/charm/reactive/kubeflow_seldon_cluster_manager.py", line 51, in start_charm
    layer.caas_base.pod_spec_set(yaml.load(rendered_podspec))
  File "lib/charms/layer/caas_base.py", line 15, in pod_spec_set
    log('set pod spec:\n{}'.format(spec), level='TRACE')
  File "/usr/local/lib/python3.6/dist-packages/charmhelpers/core/hookenv.py", line 105, in log
    subprocess.call(command)
  File "lib/charms/layer/status.py", line 165, in _patched_call
    return _orig_call(cmd, *args, **kwargs)
  File "/usr/lib/python3.6/subprocess.py", line 267, in call
    with Popen(*popenargs, **kwargs) as p:
  File "/usr/lib/python3.6/subprocess.py", line 709, in __init__
    restore_signals, start_new_session)
  File "/usr/lib/python3.6/subprocess.py", line 1344, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
OSError: [Errno 7] Argument list too long: 'juju-log'

[ycliuhw]

sorry, this should go to charm-helpers, so close it.