yq

https://github.com/mikefarah/yq/

1、下载

wget https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64 -O /usr/bin/yq
chmod +x /usr/bin/yq

2、测试

cat a.yaml 
hl:
  yani: bbb

yq .hl a.yaml

yq e -i '.hl.yani = "bbb"'  a.yaml

cat a.yaml | yq .hl

admin_key=$(yq '.deployment.admin.admin_key[0].key' conf/config.yaml | sed 's/"//g')