58 lines
2.7 KiB
Bash
58 lines
2.7 KiB
Bash
#!/usr/bin/env bash
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# k8s-status.sh — 通过 kubectl 读取 K3s 集群状态，解析输出核心字段
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# 用法:
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# bash k8s-status.sh # 默认 kubectl + 当前 kubeconfig
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# KUBECONFIG=/etc/rancher/k3s/k3s.yaml bash k8s-status.sh
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# 环境变量: KUBECTL（kubectl 路径，默认 kubectl）、KUBECONFIG
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set -euo pipefail
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KUBECTL_CMD=(kubectl)
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if [[ -n "${KUBECTL:-}" ]]; then
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KUBECTL_CMD=("$KUBECTL")
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fi
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if [[ -n "${KUBECONFIG:-}" ]]; then
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KUBECTL_CMD+=(--kubeconfig "$KUBECONFIG")
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fi
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echo "===================== K3s 集群状态巡检 ====================="
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echo "时间: $(date '+%Y-%m-%d %H:%M:%S %Z')"
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echo
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echo "────── ① 节点状态（全量 -o wide）──────"
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"${KUBECTL_CMD[@]}" get nodes -o wide
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echo
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echo "────── ② 节点健康解析（核心字段，jsonpath 精确提取）──────"
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"${KUBECTL_CMD[@]}" get nodes -o jsonpath='
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{range .items[*]}
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{ .metadata.name}{"\t"}{ .status.conditions[?(@.type=="Ready")].status}{"\t"}{ .metadata.labels.node-role\.kubernetes\.io/control-plane}{"\t"}{ .status.nodeInfo.kubeletVersion}{"\t"}{ .status.addresses[?(@.type=="InternalIP")].address}{"\t"}{ .status.addresses[?(@.type=="ExternalIP")].address}{"\t"}{ .status.nodeInfo.osImage}{"\t"}{ .status.nodeInfo.kernelVersion}{"\t"}{ .status.nodeInfo.containerRuntimeVersion}{"\n"}
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{end}' | awk -F'\t' 'NF {
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role = ($3 == "true") ? "control-plane" : "worker"
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printf " %-26s %-7s %-14s %-14s 内网IP=%-16s 公网IP=%-16s %s | %s | %s\n", $1, $2, role, $4, $5, $6, $7, $8, $9
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}'
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echo
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echo "────── ③ 节点资源占用（CPU/内存）──────"
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if "${KUBECTL_CMD[@]}" top nodes 2>/dev/null; then
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:
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else
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echo " (metrics-server 暂不可用，跳过)"
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fi
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echo
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echo "────── ④ Pod 总数 & 按节点分布 ──────"
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TOTAL=$("${KUBECTL_CMD[@]}" get pods -A --no-headers 2>/dev/null | wc -l | tr -d ' ')
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echo " 集群 Pod 总数: ${TOTAL:-0}"
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"${KUBECTL_CMD[@]}" get pods -A -o wide --no-headers 2>/dev/null | awk '{print $8}' | sort | uniq -c | awk '{printf " %s: %s 个 pod\n", $2, $1}'
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echo
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echo "────── ⑤ 异常 Pod（非 Running/Completed）──────"
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"${KUBECTL_CMD[@]}" get pods -A --no-headers 2>/dev/null | awk '$4 != "Running" && $4 != "Completed" { printf " [%s] %s/%s: %s (%s)\n", $1, $2, $3, $4, $5 }'
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echo " (无输出即全部健康)"
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echo
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echo "────── ⑥ 最近 Warning 事件（最多 5 条）──────"
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"${KUBECTL_CMD[@]}" get events -A --field-selector type=Warning --sort-by=.lastTimestamp 2>/dev/null | awk 'NR==1 {next} {print " " $0}' | tail -5 || true
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echo
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echo "===================== 巡检完成 ====================="
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