Kubernetes脚本——检查K8s基础信息

#!/bin/sh

# version
# node, master, slave
# arch
# kernel version
# docker version
# image
# cpu, mem and usage
# pod, pod limit
# service, nodeport, lb
# deploy, statefulset, deamonset
# cm, secret
# namespaces

#set -x

echo_left(){
    if [ "$2" == "" ];then
        printf "%s\n" $1 | tee -a $fn
    else
        printf "%-20s: %s\n" $1 $2 | tee -a $fn
    fi
}

check_kubectl_exist() {
    cmd=$(which kubectl)
    if [ "$cmd" == "" ];then
        echo "can't find kubectl in" $PATH  "exit."
        exit 1
    fi
}

check_kubeconfig_exist() {
    config=$(find ~/.kube -name config)
    if [ "$config" == "" ];then
        kubectl version
        if [ "$?" == "0" ];then
            echo "apiserver listen on 8080, it's ok too."
        else
            echo "can't access apiserver by kubeconfig or 8080, exit"
            exit 1
        fi
    fi
}

prepare_output_file() {
    fn="k8s-info.txt"
    > $fn

    echo_left "date" $(date +%Y%m%d%H%M%Z)
}

get_k8s_version() {
    rt=$(echo `kubectl version |grep Server | cut -d ',' -f 3 | cut -d':' -f2` | xargs)
    echo_left "version " $rt
}

get_k8s_nodes(){
    all_nodes_cnt=$(kubectl get node |grep -v NAME| wc -l)
    echo_left "nodes_count " $all_nodes_cnt

    m_nodes_cnt=$(kubectl get node |grep master | wc -l)
    echo_left "========================================="
    echo_left "masters_count " $m_nodes_cnt

    m_nodes=$(kubectl get node |grep master| cut -d ' ' -f1)
    for m in $m_nodes;do
        echo_left "-----------------------------------------"
        echo_left "master " $m
        get_node_info $m
    done

    w_nodes_cnt=$(kubectl get node |grep -v NAME |grep -v master | wc -l)
    echo_left "========================================="
    echo_left "workers_count " $w_nodes_cnt

    w_nodes=$(kubectl get node | grep -v NAME | grep -v master | cut -d ' ' -f1)
    for w in $w_nodes;do
        echo_left "-----------------------------------------"
        echo_left "worker " $w
        get_node_info $w
    done
    echo_left "========================================="
}

get_node_info() {
    local nname=$1
    if [ "$nname" == "" ];then
        exit
    fi

    jp_res=$(kubectl get node $nname -o jsonpath="{.status.nodeInfo.architecture}")
    echo_left "arch " $jp_res

    jp_res=$(kubectl get node $nname -o jsonpath="{.status.nodeInfo.kernelVersion}")
    echo_left "kernel " $jp_res

    jp_res=$(kubectl get node $nname -o jsonpath="{.status.nodeInfo.containerRuntimeVersion}")
    echo_left "cri " $jp_res

    jp_res=$(kubectl get node $nname -o jsonpath="{.status.nodeInfo.osImage}")
    echo_left "os " $jp_res

    jp_cpu_res=$(kubectl get node $nname -o jsonpath="{.status.capacity.cpu}")
    echo_left "cpu " $jp_cpu_res
    jp_cpu_allocate_res=$(kubectl get node $nname -o jsonpath="{.status.allocatable.cpu}")
    echo_left "cpu_allocatable " $jp_cpu_allocate_res
    #set -x
    #echo_left "cpu_used " $(((jp_cpu_res-15)/jp_cpu_res))
    #set -x

    jp_mem_res=$(kubectl get node $nname -o jsonpath="{.status.capacity.memory}")
    echo_left "mem " $jp_mem_res
    jp_mem_allocate_res=$(kubectl get node $nname -o jsonpath="{.status.allocatable.memory}")
    echo_left "mem_allocatable " $jp_mem_allocate_res

    get_node_pods $nname
}

get_pods_cnt(){
    all_pods_cnt=$(kubectl get pod --all-namespaces |grep -v NAME| wc -l)
    echo_left "pods_count " $all_pods_cnt
}

get_node_pods(){
    local nname=$1
    if [ "$nname" == "" ];then
        exit
    fi
    jp_res=$(kubectl get pods --all-namespaces -owide |grep $nname | wc -l)
    echo_left "pods " $jp_res

    jp_res=$(kubectl get node $nname -o jsonpath="{.status.capacity.pods}")
    echo_left "pods_limit " $jp_res
}

get_services_info(){
    all_svc_cnt=$(kubectl get svc --all-namespaces |grep -v NAME| wc -l)
    echo_left "svc_count " $all_svc_cnt
    all_svc_cnt=$(kubectl get svc --all-namespaces  | grep -v NAME | awk '{print $6}' | grep ':' | wc -l)
    echo_left "svc_nodeport" $all_svc_cnt
}

get_deploys_info(){
    all_deploy_cnt=$(kubectl get deploy --all-namespaces |grep -v NAME| wc -l)
    echo_left "deploy_count " $all_deploy_cnt
}

get_stss_info(){
    all_sts_cnt=$(kubectl get sts --all-namespaces |grep -v NAME| wc -l)
    echo_left "sts_count " $all_sts_cnt
}

get_dss_info(){
    all_ds_cnt=$(kubectl get ds --all-namespaces |grep -v NAME| wc -l)
    echo_left "ds_count " $all_ds_cnt
}

get_config_info(){
    all_cm_cnt=$(kubectl get cm --all-namespaces |grep -v NAME| wc -l)
    echo_left "cm_count " $all_cm_cnt
    all_secret_cnt=$(kubectl get secret --all-namespaces |grep -v NAME| grep -v default-token |wc -l)
    echo_left "secret_nodefault" $all_secret_cnt
}

get_ns_info(){
    all_ns_cnt=$(kubectl get ns --all-namespaces |grep -v NAME| wc -l)
    echo_left "ns_count " $all_ns_cnt
}

main(){
    check_kubectl_exist
    check_kubeconfig_exist

    prepare_output_file

    get_k8s_version
    get_services_info
    get_deploys_info
    get_stss_info
    get_dss_info
    get_config_info
    get_ns_info
    get_pods_cnt
    get_k8s_nodes
}

main