Graphviz how to fix the x pos of clusters - graphviz

Question

Currently, I'm trying to fix the x Pos of clusters as they seem to move around creating a cluttered graph. All the sub-graph got rank=same and newrank=true. constraint value is set to true only for edges going from one cluster to another.
Tried many options from http://martin-loetzsch.de/S-DOT/constraint.html and couldn't get it to work. Does anyone know why the sub-graphs get moved horizontally like above?
// layered_view
digraph layered_view {
bgcolor=transparent fontsize=8 nodesep=0.2 rankdir=TB splines=ortho
switch_1 -> lake [label="" color=gold4 constraint=True dir=both style=solid]
switch_1 -> lake [label="" color=chartreuse4 constraint=True dir=both style=solid]
switch_1 -> switch_2 [label="" color=gold4 constraint=True dir=both style=solid]
switch_1 -> switch_2 [label="" color=chartreuse4 constraint=True dir=both style=solid]
switch_1 -> azure_1 [label="" color=gold4 constraint=True dir=both style=solid]
switch_1 -> azure_1 [label="" color=chartreuse4 constraint=True dir=both style=solid]
switch_2 -> watson [label="" color=goldenrod4 constraint=True dir=both style=solid]
lake -> tsX [label="" color=chartreuse4 constraint=True dir=both style=solid]
lake -> ptX [label="" color=chartreuse4 constraint=True dir=both style=solid]
switch_1 -> dropBox [label="" color=chartreuse4 constraint=True dir=both style=solid]
switch_1 -> ptX [label="" color=gold4 constraint=True dir=both style=solid]
switch_1 -> tsX [label="" color=goldenrod4 constraint=True dir=both style=solid]
switch_1 -> watson [label="" color=goldenrod4 constraint=True dir=both style=solid]
// software
subgraph cluster_software {
bgcolor=green color=black concentrate=true fontsize=8 label=Software newrank=true rank=same splines=ortho
// applications
subgraph cluster_applications {
bgcolor=green color=black concentrate=true fontsize=8 label=Applications newrank=true rank=same splines=ortho
tsX [label=tsX color=black fillcolor=chartreuse1 fixedsize=true shape=rectangle style=filled width=1.3 xlabel=""]
ptX [label=ptX color=black fillcolor=chartreuse1 fixedsize=true shape=rectangle style=filled width=1.3 xlabel=""]
}
// cloud
subgraph cluster_cloud {
bgcolor=green color=black concentrate=true fontsize=8 label=Cloud newrank=true rank=same splines=ortho
azure_1 [label=azure_1 color=black fillcolor=darkolivegreen1 fixedsize=true shape=rectangle style=filled width=1.3 xlabel=""]
dropBox [label=dropBox color=black fillcolor=darkolivegreen1 fixedsize=true shape=rectangle style=filled width=1.3 xlabel=""]
}
}
// systems
subgraph cluster_systems {
bgcolor=green color=black concentrate=true fontsize=8 label=Systems newrank=true rank=same splines=ortho
// computing
subgraph cluster_computing {
bgcolor=green color=black concentrate=true fontsize=8 label=Computing newrank=true rank=same splines=ortho
"ex-uni" [label="ex-uni" color=black fillcolor=cadetblue fixedsize=true shape=rectangle style=filled width=1.3 xlabel=""]
}
// sensors
subgraph cluster_sensors {
bgcolor=green color=black concentrate=true fontsize=8 label=Sensors newrank=true rank=same splines=ortho
watson [label=watson color=black fillcolor=blue fixedsize=true shape=rectangle style=filled width=1.3 xlabel=""]
}
// storage
subgraph cluster_storage {
bgcolor=green color=black concentrate=true fontsize=8 label=Storages newrank=true rank=same splines=ortho
lake [label=lake color=black fillcolor=deepskyblue2 fixedsize=true shape=rectangle style=filled width=1.3 xlabel=""]
}
}
// network
subgraph cluster_network {
bgcolor=green color=black concentrate=true fontsize=8 label=Network newrank=true rank=same splines=ortho
// switch
subgraph cluster_switch {
bgcolor=green color=black concentrate=true fontsize=8 label=Switch newrank=true rank=same splines=ortho
switch_1 [label=switch_1 color=black fillcolor=gold fixedsize=true shape=rectangle style=filled width=1.3 xlabel=""]
}
}
// artifacts
subgraph cluster_artifacts {
bgcolor=green color=black concentrate=true fontsize=8 label=Artifacts newrank=true rank=same splines=ortho
switch_2 [label=switch_2 color=black fillcolor=white fixedsize=true shape=rectangle style=filled width=1.3 xlabel=""]
}
}

Answer 1

I've not found a straight-forward way to easily move clusters around. Here is kludge that does what you want (I think) and does not take too much fiddling of the source:
comment out all your edges with /* ... */ (the edges are causing the non-alignment)
add these lines at the end (to produce the alignment you want):
switch_1 -> switch_2 -> watson [style=invis]
watson -> {azure_1 tsX} [style=invis]
run dot with -Tdot for the output file format
edit the output file and reinsert the edges you commented out
run neato with -n option to pin the nodes & clusters and add the edges
neato -n -Tpng mylile.dot >myfile.png
Giving: