yaml语法

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include_newlines: |
  exactly as you see
  will appear these three
  lines of poetry  

fold_newlines: >
  this is really a
  single line of text
  despite appearances  

fold_some_newlines: >
  a
  b

  c
  d
    e
  f  
same_as: "a b\nc d\n  e\nf\n"

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---
receipt:     Oz-Ware Purchase Invoice
date:        2012-08-06
customer:
    given:   Dorothy
    family:  Gale
   
items:
    - part_no:   A4786
      descrip:   Water Bucket (Filled)
      price:     1.47
      quantity:  4

    - part_no:   E1628
      descrip:   High Heeled "Ruby" Slippers
      size:      8
      price:     133.7
      quantity:  1

bill-to:  &id001    # 锚点
    street: | 
            123 Tornado Alley
            Suite 16
    city:   East Centerville
    state:  KS

ship-to:  *id001    # 引用

specialDelivery:  >
    Follow the Yellow Brick
    Road to the Emerald City.
    Pay no attention to the
    man behind the curtain.    
...

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--- # 最喜欢的电影
- Casablanca
- North by Northwest
- Notorious

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--- # 货物清单
[milk, pumpkin pie, eggs, juice]

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data: |
  There once was a man from Darjeeling
  Who got on a bus bound for Ealing
    It said on the door
    "Please don't spit on the floor"
  So he carefully spat on the ceiling  

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data: >
  Wrapped text
  will be folded
  into a single
  paragraph

  Blank lines denote
  paragraph breaks  

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- {name: John Smith, age: 33}
- name: Mary Smith
  age: 27

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men: [John Smith, Bill Jones]
women: 
  - Mary Smith
  - Susan Williams

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---
- step: &id001
    instrument:   Lasik 2000
    pulseEnergy:  5.4
    pulseDuration: 12
    repetition:   1000
    spotSize:     1mm
- step:
    <<: *id001
    spotSize:     2mm   #覆盖"spotSize"的值
- step:
    <<: *id001    
    pulseEnergy:   500.0  # 覆盖键值
    alert: >              # 加入其他键值
      warn patient of
      andible pop

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for a in ${aa[@]}; do echo $a; kubectl get deploy $a -n lanjing-test -o go-template --template '{{range $key,$val:=  .spec.template.spec.volumes }}{{range $key1,$val1 := $val}}{{if eq $key1 "configMap"}}{{ println $val1.name }}{{end}}{{end}}{{end}}' >> test.txt; done

cat test.txt | uniq  > test.txt