sigs.k8s.io/cluster-api@v1.7.1/docs/book/src/images/cluster-admission-machinedeployment-controller.svg

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stroke-width: 1.5;" width="378" x="185" y="147.9688"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="358" x="195" y="169.1074">MachineDeployment controller enqueues a Reconcile call</text><rect fill="#FEFECE" filter="url(#fzmnu8cr7jimo)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; stroke-width: 1.5;" width="235" x="256.5" y="201.9375"/><text fill="#000000" font-family="sans-serif" font-size="12" lengthAdjust="spacingAndGlyphs" textLength="215" x="266.5" y="223.0762">List all MachineSets in namespace</text><polygon fill="#FEFECE" filter="url(#fzmnu8cr7jimo)" points="83,355.6167,350,355.6167,362,367.6167,350,379.6167,83,379.6167,71,367.6167,83,355.6167" style="stroke: #A80036; stroke-width: 1.5;"/><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="20" x="220.5" y="389.8271">yes</text><text fill="#000000" font-family="sans-serif" font-size="11" lengthAdjust="spacingAndGlyphs" textLength="267" x="83" y="371.4248">MachineSet Owned by this MachineDeployment</text><rect fill="#ADD8E6" filter="url(#fzmnu8cr7jimo)" height="33.9688" rx="12.5" ry="12.5" style="stroke: #A80036; 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@startuml cluster-admission-machinedeployment-controller

start;
:MachineDeployment controller;

repeat
  :MachineDeployment controller enqueues a Reconcile call;
  :List all MachineSets in namespace;
  repeat
    if (MachineSet matches MachineDeployment's selector) then (yes)
      if (MachineSet Owned by this MachineDeployment) then (yes)
        #LightBlue:Add to List;
      elseif (Not Owned By Any MachineDeployment) then (yes)
        :Adopt MachineSet;
        #LightBlue:Add to List;
      endif
    endif
  repeat while (More MachineSets) then (yes)
  if (Paused) then (yes)
   #LightBlue:Update status and exit;
  else 
    if (RollingUpdate Deployment Strategy) then (yes)
      :Select newest MachineSet;
      if (Too Many replicas) then (yes)
        #LightBlue:Scale machineSet down;
      elseif (Not Enough Replicas)
        #LightBlue:Create new replicas;
      endif
      if (Old MachineSet Replicas are Unhealthy) then (yes)
        #LightBlue:Cleanup Unhealthy Replicas;
      elseif (New MachineSets Replicas available) then (yes)
        #LightBlue:Scale MachineSet down;
      endif
    else (no)
      #Pink:Unknown strategy;
    endif
  endif
repeat while (More updates to MachineDeployments) then (yes)
stop;

@enduml

PlantUML version 1.2017.15(Mon Jul 03 12:45:34 EDT 2017)
(GPL source distribution)
Java Runtime: OpenJDK Runtime Environment
JVM: OpenJDK 64-Bit Server VM
Java Version: 11.0.4+11-post-Ubuntu-1ubuntu218.04.3
Operating System: Linux
OS Version: 5.1.14-050114-generic
Default Encoding: UTF-8
Language: en
Country: US
--></g></svg>