From 4e617db7b573f207698e3d10ccc2907271e900de Mon Sep 17 00:00:00 2001
From: chestack <wangbo_bupt@163.com>
Date: Mon, 19 Nov 2018 17:45:46 +0800
Subject: [PATCH] Fix yaml file and bash command

add known issue about ConfigMap updates
---
 concepts/configmap-hot-update.md | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/concepts/configmap-hot-update.md b/concepts/configmap-hot-update.md
index 599570d9f..fdede09ac 100644
--- a/concepts/configmap-hot-update.md
+++ b/concepts/configmap-hot-update.md
@@ -320,9 +320,9 @@ spec:
         image: harbor-001.jimmysong.io/library/nginx:1.9
         ports:
         - containerPort: 80
-      volumeMounts:
-      - name: config-volume
-        mountPath: /etc/config
+        volumeMounts:
+        - name: config-volume
+          mountPath: /etc/config
       volumes:
         - name: config-volume
           configMap:
@@ -338,7 +338,7 @@ data:
 ```
 
 ```bash
-$ kubectl exec `kubectl get pods -l run=my-nginx  -o=name|cut -d "/" -f2` cat /tmp/log_level
+$ kubectl exec `kubectl get pods -l run=my-nginx  -o=name|cut -d "/" -f2` cat /etc/config/log_level
 INFO
 ```
 
@@ -359,6 +359,10 @@ DEBUG
 
 我们可以看到使用 ConfigMap 方式挂载的 Volume 的文件中的内容已经变成了 `DEBUG`。
 
+Known Issue：
+如果使用ConfigMap的**subPath**挂载为Container的Volume，Kubernetes不会做自动热更新:
+https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-configmap/#mounted-configmaps-are-updated-automatically
+
 ## ConfigMap 更新后滚动更新 Pod
 
 更新 ConfigMap 目前并不会触发相关 Pod 的滚动更新，可以通过修改 pod annotations 的方式强制触发滚动更新。