use printf to replace printenv
Signed-off-by: Weiping Cai <weiping.cai@daocloud.io>
This commit is contained in:
+4
-6
@@ -53,12 +53,10 @@ Pod:
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kubectl logs pod/dependent-envars-demo
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```
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```
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SERVICE_ADDRESS
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https://172.17.0.1:80
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UNCHANGED_REFERENCE
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$(PROTOCOL)://172.17.0.1:80
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ESCAPED_REFERENCE
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$(PROTOCOL)://172.17.0.1:80
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UNCHANGED_REFERENCE=$(PROTOCOL)://172.17.0.1:80
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SERVICE_ADDRESS=https://172.17.0.1:80
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ESCAPED_REFERENCE=$(PROTOCOL)://172.17.0.1:80
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```
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As shown above, you have defined the correct dependency reference of `SERVICE_ADDRESS`, bad dependency reference of `UNCHANGED_REFERENCE` and skip dependent references of `ESCAPED_REFERENCE`.
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@@ -4,23 +4,23 @@ metadata:
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name: dependent-envars-demo
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spec:
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containers:
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- name: dependent-envars-demo
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args:
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- while true; do echo -en '\n'; echo SERVICE_ADDRESS;printenv SERVICE_ADDRESS;echo UNCHANGE_REFERENCE;printenv UNCHANGE_REFERENCE;echo ESCAPED_REFERENCE;printenv ESCAPED_REFERENCE; sleep 30; done;
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command:
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- name: dependent-envars-demo
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args:
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- while true; do echo -en '\n'; printf UNCHANGED_REFERENCE=$UNCHANGED_REFERENCE'\n'; printf SERVICE_ADDRESS=$SERVICE_ADDRESS'\n';printf ESCAPED_REFERENCE=$ESCAPED_REFERENCE'\n'; sleep 30; done;
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command:
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- sh
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- -c
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image: busybox
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env:
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- name: SERVICE_PORT
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value: "80"
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- name: SERVICE_IP
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value: "172.17.0.1"
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- name: UNCHANGED_REFERENCE
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value: "$(PROTOCOL)://$(SERVICE_IP):$(SERVICE_PORT)"
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- name: PROTOCOL
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value: "https"
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- name: SERVICE_ADDRESS
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value: "$(PROTOCOL)://$(SERVICE_IP):$(SERVICE_PORT)"
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- name: ESCAPED_REFERENCE
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value: "$$(PROTOCOL)://$(SERVICE_IP):$(SERVICE_PORT)"
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image: busybox
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env:
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- name: SERVICE_PORT
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value: "80"
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- name: SERVICE_IP
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value: "172.17.0.1"
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- name: UNCHANGED_REFERENCE
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value: "$(PROTOCOL)://$(SERVICE_IP):$(SERVICE_PORT)"
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- name: PROTOCOL
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value: "https"
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- name: SERVICE_ADDRESS
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value: "$(PROTOCOL)://$(SERVICE_IP):$(SERVICE_PORT)"
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- name: ESCAPED_REFERENCE
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value: "$$(PROTOCOL)://$(SERVICE_IP):$(SERVICE_PORT)"
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