initial commit

Olaf Bohlen

2019-10-02 a812b5684a44f1c11ebe8ad98ef6f103636d2138

initial commit

 openshift-diagrams.org

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#+TODO: TODO(t) NEXT(n) WAITING(w) SOMEDAY(s) DELEGATED(g) PROJ(p) PLANNED(l) | DONE(d) FORWARDED(f) CANCELLED(c)
#+PRIORITIES: A D D
#+OPTIONS: H:1 author:nil toc:nil date:nil t:nil <:t e:t p:t num:nil
#+TITLE: OpenShift Diagrams by Olaf Bohlen
#+LaTeX_CLASS: article
#+LaTeX_HEADER: \usepackage[ttscale=.875]{libertine}
#+LaTeX_HEADER: \usepackage{sectsty}
#+LaTeX_HEADER: \sectionfont{\normalfont\scshape}
#+LaTeX_HEADER: \subsectionfont{\normalfont\itshape}
#+LATEX_HEADER: \renewcommand\maketitle{}

* Deployment on OpenShift with images

#+BEGIN_SRC ditaa :file ocp-dep-image1.png :cmdline -r
oc new-app sample.registry.org/user/image:tag
   |
   |                             
   | (1)  +-------------+   points to    +------------------------------------+
   +--->  | ImageStream |  ----------->  | external Registry cRED {s}         |
   |      | (IS)        |                | sample.registry.org/user/image:tag |
   |      +-------------+                +------------------------------------+
   |             ^
   |             | points to
   | (2)  +------------------+  (5) creates                       +-----------------------+
   +--->  | DeploymentConfig | -------------------------------->  | ReplicationController |                
   |      | (DC)             |  (4)         +-----------+         | (RC)                  |
   |      |                  | --------->   | DeployPod |         +-----------------------+
   |      +------------------+  creates     +-----------+                 |
   |                                              | (6) creates           |scales &
   |                                              v                       |monitors
   | (3)  +---------+   load balances   +----------------+                |
   +--->  | Service |  -------------->  | ApplicationPod |  <-------------+
          | (SVC)   |                   |                |
          +---------+                   +----------------+
#+END_SRC

#+results:
[[file:ocp-dep-image1.png]]

* Deployment on OpenShift with Source-to-Image (S2I)

#+BEGIN_SRC ditaa :file ocp-dep-s2i1.png :cmdline -rE
oc new-app http://git.repo-server.org/sampleapp
       |
       |                             
       | (1)  +-------------+   points to    +----------------------------+    +------------------------------------+
       +--->  | ImageStream |  ----------->  | internal Registry cBLU {s} |    | external Registry cRED {s}         |
       |      | (IS)        |<+              | sampleapp:latest           |    | sample.registry.org/ose/s2ibuilder |
       |      +-------------+ |              +----------------------------+    +------------------------------------+
       |                      |                  ^                                      ^
       |                      |                  | (9) docker commits                   | points to
       |                      |                  |                                      |
       | (2)  +-------------+ |(5) creates   +--------------+  (6) docker run      +-----------------+
       +--->  | BuildConfig | |----------->  | BuilderPod   | ------------------>  | S2I ImageStream |
       |      | (BC)        | |              | (8) assemble |                      | (IS)            |
       |      +-------------+ |              +--------------+                      +-----------------+
       |             |        |                  | (7) git clone                        ^
       |             +--=-----|----=-------------|---=----------------------------------+
       |       ImageChange    |                  |                                                                   
       |       Trigger watches|                  v                                                                    
       |       S2I IS         |              +--------------------------------------+                                
       |                      |              | git Repository {s}                   |                                
build  |                      |              | http://git.repo-server.org/sampleapp |                                
step   |                      :              +--------------------------------------+                                
-=-----|-=--------------------|--=-------------------------------------------------------------------------------------
deploy |                      |ImageChange
step   |                      |Trigger
       |                      |watches IS 
       | (3)  +------------------+  (11) creates                      +-----------------------+
       +--->  | DeploymentConfig | -------------------------------->  | ReplicationController |                
       |      | (DC)             |  (10)        +-----------+         | (RC)                  |
       |      |                  | --------->   | DeployPod |         +-----------------------+
       |      +------------------+  creates     +-----------+                 |
       |                                              | (12) creates          |scales &
       |                                              v                       |monitors
       | (4)  +---------+   load balances   +----------------+                |
       +--->  | Service |  -------------->  | ApplicationPod |  <-------------+
              | (SVC)   |                   |                |
              +---------+                   +----------------+
#+END_SRC

#+results:
[[file:ocp-dep-s2i1.png]]

* Input Detection OpenShift 
#+begin_src plantuml :file openshift-input-detection.png
!pragma useVerticalIf on
:oc new-app <input spec>;
if (docker pull) then (yes)
  -> yes
  --docker-image= forces this;
  :docker run;
  note: --docker-image= forces this
  stop
else (no)
  :try for an SCM code repo;
  note: --code forces this
if (git clone) then (no)
  :abort with error;
  stop
elseif (Dockerfile found?) then (yes)
  :docker build;
  note: --strategy=docker forces this
  :docker run;
  stop
else (no)
  :continue with S2I;
  note right: --strategy=source forces this
if (pom.xml found?) then (yes)
  :search for JEE S2I builder;
  note: use -i to suggest an S2I image stream (tag);
  :continue with S2I process;
  stop
elseif (index.php found?) then (yes)
  :search for PHP S2I builder;
  note 
    prefix the git url with builderis~ (tilda!) 
    to turn off language detection and force this builder
  end note
  :continue with S2I process;
  stop
else
  :abort with error;
  stop
endif
#+end_src

#+results:
[[file:openshift-input-detection.png]]

 openshift-diagrams.pdf

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