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use printf to replace printenv

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Signed-off-by: Weiping Cai <weiping.cai@daocloud.io>
This commit is contained in:
Weiping Cai
2020-07-01 14:48:38 +08:00
parent 506a57849b
commit 4490fe014f
2 changed files with 22 additions and 24 deletions
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content/en/docs/tasks/inject-data-application/define-interdependent-environment-variables.md
+4 -6
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@@ -53,12 +53,10 @@ Pod:
kubectl logs pod/dependent-envars-demo kubectl logs pod/dependent-envars-demo
``` ```
``` ```
SERVICE_ADDRESS
https://172.17.0.1:80 UNCHANGED_REFERENCE=$(PROTOCOL)://172.17.0.1:80
UNCHANGED_REFERENCE SERVICE_ADDRESS=https://172.17.0.1:80
$(PROTOCOL)://172.17.0.1:80 ESCAPED_REFERENCE=$(PROTOCOL)://172.17.0.1:80
ESCAPED_REFERENCE
$(PROTOCOL)://172.17.0.1:80
``` ```
As shown above, you have defined the correct dependency reference of `SERVICE_ADDRESS`, bad dependency reference of `UNCHANGED_REFERENCE` and skip dependent references of `ESCAPED_REFERENCE`. As shown above, you have defined the correct dependency reference of `SERVICE_ADDRESS`, bad dependency reference of `UNCHANGED_REFERENCE` and skip dependent references of `ESCAPED_REFERENCE`.
content/en/examples/pods/inject/dependent-envars.yaml
+18 -18
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@@ -4,23 +4,23 @@ metadata:
name: dependent-envars-demo name: dependent-envars-demo
spec: spec:
containers: containers:
- name: dependent-envars-demo - name: dependent-envars-demo
args: args:
- while true; do echo -en '\n'; echo SERVICE_ADDRESS;printenv SERVICE_ADDRESS;echo UNCHANGE_REFERENCE;printenv UNCHANGE_REFERENCE;echo ESCAPED_REFERENCE;printenv ESCAPED_REFERENCE; sleep 30; done; - while true; do echo -en '\n'; printf UNCHANGED_REFERENCE=$UNCHANGED_REFERENCE'\n'; printf SERVICE_ADDRESS=$SERVICE_ADDRESS'\n';printf ESCAPED_REFERENCE=$ESCAPED_REFERENCE'\n'; sleep 30; done;
command: command:
- sh - sh
- -c - -c
image: busybox image: busybox
env: env:
- name: SERVICE_PORT - name: SERVICE_PORT
value: "80" value: "80"
- name: SERVICE_IP - name: SERVICE_IP
value: "172.17.0.1" value: "172.17.0.1"
- name: UNCHANGED_REFERENCE - name: UNCHANGED_REFERENCE
value: "$(PROTOCOL)://$(SERVICE_IP):$(SERVICE_PORT)" value: "$(PROTOCOL)://$(SERVICE_IP):$(SERVICE_PORT)"
- name: PROTOCOL - name: PROTOCOL
value: "https" value: "https"
- name: SERVICE_ADDRESS - name: SERVICE_ADDRESS
value: "$(PROTOCOL)://$(SERVICE_IP):$(SERVICE_PORT)" value: "$(PROTOCOL)://$(SERVICE_IP):$(SERVICE_PORT)"
- name: ESCAPED_REFERENCE - name: ESCAPED_REFERENCE
value: "$$(PROTOCOL)://$(SERVICE_IP):$(SERVICE_PORT)" value: "$$(PROTOCOL)://$(SERVICE_IP):$(SERVICE_PORT)"