题干

For this question, please set this context (In exam, diff cluster name)

kubectl config use-context kubernetes-admin@kubernetes

Find the Node that consumes the most MEMORY in all cluster(currently we have single cluster). Then, store the result in the file high_memory_node.txt with the following format: cluster_name,node_name .

找出所有集群中消耗内存最多的节点(目前我们只有一个集群)。然后，将结果以以下格式存储在high_memory_node.txt文件中:cluster_name,node_name。

解题思路

1. 切换K8S集群环境

kubectl config use-context kubernetes-admin@kubernetes

2. 查找集群中节点内存使用最多的节点，并把结果存在变量node中

node=$(kubectl top nodes --sort-by=memory --no-headers | head -n 1 | awk '{print $1}')

3. 查找集群名称

cluster_name=$(kubectl config view --minify -o=jsonpath='{.clusters[0].name}')

4. 并按照题目的要求把结果输出到指定文件中

echo "$cluster_name,$node" > high_memory_node.txt