实用 kubectl 脚本

本文分享腾讯云容器服务相关常用实用 kubectl 脚本。

ENI 相关

查询节点的 eni-ip Allocatable 情况:

kubectl get nodes -o=jsonpath='{range .items[*]}{.metadata.name}{"\t"}{.status.allocatable.tke\.cloud\.tencent\.com\/eni-ip}{"\n"}{end}'

指定可用区节点的 eni-ip Allocatable 情况:

kubectl get nodes -o=jsonpath='{range .items[?(@.metadata.labels.failure-domain\.beta\.kubernetes\.io\/zone=="100003")]}{.metadata.name}{"\t"}{.status.allocatable.tke\.cloud\.tencent\.com\/eni-ip}{"\n"}{end}'

查看各节点 ENI 的子网网段:

kubectl get nec -o json | jq -r '.items[] | select(.status.eniInfos!=null)| { name: .metadata.name, zone: , subnetCIDR: [.status.eniInfos[].subnetCIDR]|join(",") }| "\(.name)\t\(.subnetCIDR)"'

查可以绑指定子网ENI的节点都是在哪个可用区:

# 指定子网
subnetCIDR="11.185.48.0/20"
# 查询哪些节点可以绑这个子网的 ENI
kubectl get nec -o json | jq -r '.items[] | select(.status.eniInfos!=null)| { name: .metadata.name, subnetCIDR: [.status.eniInfos[].subnetCIDR]|join(",") }| "\(.name)\t\(.subnetCIDR)"' | grep $subnetCIDR | awk '{print $1}' > node-cidr.txt
# 查询所有节点的可用区
kubectl get nodes -o=jsonpath='{range .items[*]}{.metadata.name}{"\t"}{.metadata.labels.failure-domain\.beta\.kubernetes\.io\/zone}{"\n"}{end}' > node-zone.txt
# 筛选出可以绑这个子网的节点都是在哪个可用区
awk 'BEGIN{while(getline<"node-cidr.txt") a[$1]=1;} {if(a[$1]==1) print $0;}' node-zone.txt


# 合并一下就是
subnetCIDR="11.185.48.0/20"
kubectl get nec -o json | jq -r '.items[] | select(.status.eniInfos!=null)| { name: .metadata.name, subnetCIDR: [.status.eniInfos[].subnetCIDR]|join(",") }| "\(.name)\t\(.subnetCIDR)"' | grep $subnetCIDR | awk '{print $1}' > node-cidr.txt && kubectl get nodes -o=jsonpath='{range .items[*]}{.metadata.name}{"\t"}{.metadata.labels.failure-domain\.beta\.kubernetes\.io\/zone}{"\n"}{end}' > node-zone.txt &&  awk 'BEGIN{while(getline<"node-cidr.txt") a[$1]=1;} {if(a[$1]==1) print $0;}' node-zone.txt

EKS 相关

查看 eks 集群子网剩余 ip 数量:

kubectl get node -o json | jq -r '.items[] | {subnet: .metadata.annotations."eks.tke.cloud.tencent.com/subnet-id", ip: .metadata.labels."eks.tke.cloud.tencent.com/available-ip-count"} |  "\(.subnet)\t\(.ip)"'

查看指定子网剩余 ip 数量

# 直接替换子网 id 查
kubectl get node -o json | jq -r '.items[] | select(.metadata.annotations."eks.tke.cloud.tencent.com/subnet-id"=="subnet-1p9zhi9g") | {ip: .metadata.labels."eks.tke.cloud.tencent.com/available-ip-count"} |  "\(.ip)"'

# 使用变量查
subnet="subnet-1p9zhi9g"
kubectl get node -o json | jq -r '.items[] | {subnet: .metadata.annotations."eks.tke.cloud.tencent.com/subnet-id", ip: .metadata.labels."eks.tke.cloud.tencent.com/available-ip-count"} |  "\(.subnet)\t\(.ip)"' | grep $subnet | awk '{print $2}'

查看指定固定 IP 的 Pod 所在子网剩余 IP 数量:

pod="wedata-lineage-service-test-env-48872523-0"
kubectl get cm static-addresses -o json | jq -r ".data.\"${pod}\"" | xargs kubectl get node -o json | jq -r '{ip: .metadata.labels."eks.tke.cloud.tencent.com/available-ip-count"} |  "\(.ip)"'