keras和tensorflow的版本对应关系，可参考：

Framework Env name (--env parameter) Description Docker Image Packages and Nvidia Settings
TensorFlow 1.14 tensorflow-1.14 TensorFlow 1.14.0 + Keras 2.2.5 on Python 3.6. floydhub/tensorflow TensorFlow-1.14
TensorFlow 1.13 tensorflow-1.13 TensorFlow 1.13.0 + Keras 2.2.4 on Python 3.6. floydhub/tensorflow TensorFlow-1.13
TensorFlow 1.12 tensorflow-1.12 TensorFlow 1.12.0 + Keras 2.2.4 on Python 3.6. floydhub/tensorflow TensorFlow-1.12
  tensorflow-1.12:py2 TensorFlow 1.12.0 + Keras 2.2.4 on Python 2. floydhub/tensorflow  
TensorFlow 1.11 tensorflow-1.11 TensorFlow 1.11.0 + Keras 2.2.4 on Python 3.6. floydhub/tensorflow TensorFlow-1.11
  tensorflow-1.11:py2 TensorFlow 1.11.0 + Keras 2.2.4 on Python 2. floydhub/tensorflow  
TensorFlow 1.10 tensorflow-1.10 TensorFlow 1.10.0 + Keras 2.2.0 on Python 3.6. floydhub/tensorflow TensorFlow-1.10
  tensorflow-1.10:py2 TensorFlow 1.10.0 + Keras 2.2.0 on Python 2. floydhub/tensorflow  
TensorFlow 1.9 tensorflow-1.9 TensorFlow 1.9.0 + Keras 2.2.0 on Python 3.6. floydhub/tensorflow TensorFlow-1.9
  tensorflow-1.9:py2 TensorFlow 1.9.0 + Keras 2.2.0 on Python 2. floydhub/tensorflow  
TensorFlow 1.8 tensorflow-1.8 TensorFlow 1.8.0 + Keras 2.1.6 on Python 3.6. floydhub/tensorflow TensorFlow-1.8
  tensorflow-1.8:py2 TensorFlow 1.8.0 + Keras 2.1.6 on Python 2. floydhub/tensorflow  
TensorFlow 1.7 tensorflow-1.7 TensorFlow 1.7.0 + Keras 2.1.6 on Python 3.6. floydhub/tensorflow TensorFlow-1.7
  tensorflow-1.7:py2 TensorFlow 1.7.0 + Keras 2.1.6 on Python 2. floydhub/tensorflow  
TensorFlow 1.5 tensorflow-1.5 TensorFlow 1.5.0 + Keras 2.1.6 on Python 3.6. floydhub/tensorflow TensorFlow-1.5
  tensorflow-1.5:py2 TensorFlow 1.5.0 + Keras 2.1.6 on Python 2. floydhub/tensorflow  
TensorFlow 1.4 tensorflow-1.4 TensorFlow 1.4.0 + Keras 2.0.8 on Python 3.6. floydhub/tensorflow  
  tensorflow-1.4:py2 TensorFlow 1.4.0 + Keras 2.0.8 on Python 2. floydhub/tensorflow  
TensorFlow 1.3 tensorflow-1.3 TensorFlow 1.3.0 + Keras 2.0.6 on Python 3.6. floydhub/tensorflow  
  tensorflow-1.3:py2 TensorFlow 1.3.0 + Keras 2.0.6 on Python 2. floydhub/tensorflow  
TensorFlow 1.2 tensorflow-1.2 TensorFlow 1.2.0 + Keras 2.0.6 on Python 3.5. floydhub/tensorflow  
  tensorflow-1.2:py2 TensorFlow 1.2.0 + Keras 2.0.6 on Python 2. floydhub/tensorflow  
TensorFlow 1.1 tensorflow TensorFlow 1.1.0 + Keras 2.0.6 on Python 3.5. floydhub/tensorflow  
  tensorflow:py2 TensorFlow 1.1.0 + Keras 2.0.6 on Python 2. floydhub/tensorflow  
TensorFlow 1.0 tensorflow-1.0 TensorFlow 1.0.0 + Keras 2.0.6 on Python 3.5. floydhub/tensorflow  
  tensorflow-1.0:py2 TensorFlow 1.0.0 + Keras 2.0.6 on Python 2. floydhub/tensorflow  
TensorFlow 0.12 tensorflow-0.12 TensorFlow 0.12.1 + Keras 1.2.2 on Python 3.5. floydhub/tensorflow  
  tensorflow-0.12:py2 TensorFlow 0.12.1 + Keras 1.2.2 on Python 2. floydhub/tensorflow  
PyTorch 1.1 pytorch-1.1 PyTorch 1.1.0 + fastai 1.0.57 on Python 3.6. floydhub/pytorch PyTorch-1.1
PyTorch 1.0 pytorch-1.0 PyTorch 1.0.0 + fastai 1.0.51 on Python 3.6. floydhub/pytorch PyTorch-1.0
  pytorch-1.0:py2 PyTorch 1.0.0 on Python 2. floydhub/pytorch  
PyTorch 0.4 pytorch-0.4 PyTorch 0.4.1 on Python 3.6. floydhub/pytorch PyTorch-0.4
  pytorch-0.4:py2 PyTorch 0.4.1 on Python 2. floydhub/pytorch  
PyTorch 0.3 pytorch-0.3 PyTorch 0.3.1 on Python 3.6. floydhub/pytorch PyTorch-0.3
  pytorch-0.3:py2 PyTorch 0.3.1 on Python 2. floydhub/pytorch  
PyTorch 0.2 pytorch-0.2 PyTorch 0.2.0 on Python 3.5 floydhub/pytorch  
  pytorch-0.2:py2 PyTorch 0.2.0 on Python 2. floydhub/pytorch  
PyTorch 0.1 pytorch-0.1 PyTorch 0.1.12 on Python 3. floydhub/pytorch  
  pytorch-0.1:py2 PyTorch 0.1.12 on Python 2. floydhub/pytorch  
Theano 0.9 theano-0.9 Theano rel-0.8.2 + Keras 2.0.3 on Python3.5. floydhub/theano  
  theano-0.9:py2 Theano rel-0.8.2 + Keras 2.0.3 on Python2. floydhub/theano  
Caffe caffe Caffe rc4 on Python3.5. floydhub/caffe  
  caffe:py2 Caffe rc4 on Python2. floydhub/caffe  
Torch torch Torch 7 with Python 3 env. floydhub/torch  
  torch:py2 Torch 7 with Python 2 env. floydhub/torch  
Chainer 1.23 chainer-1.23 Chainer 1.23.0 on Python 3. floydhub/chainer  
  chainer-1.23:py2 Chainer 1.23.0 on Python 2. floydhub/chainer  
Chainer 2.0 chainer-2.0 Chainer 1.23.0 on Python 3. floydhub/chainer  
  chainer-2.0:py2 Chainer 1.23.0 on Python 2. floydhub/chainer  
MxNet 1.0 mxnet MxNet 1.0.0 on Python 3.6. floydhub/mxnet  
  mxnet:py2 MxNet 1.0.0 on Python 2. floydhub/mxnet

@https://docs.floydhub.com/guides/environments/