\u7cfb\u7edf\u8d44\u6e90\u76d1\u63a7<\/strong><\/h2>\n

\u8d44\u6e90\u8017\u5c3d\u53ef\u80fd\u89e6\u53d1\u8bbf\u95ee\u95ee\u9898\u3002\u5b9e\u65bd\u8fd9\u4e9b\u76d1\u63a7\u547d\u4ee4\uff1a<\/p>\n

\r\n# Real-time resource monitoring\r\nhtop\r\n\r\n# Check disk I\/O\r\niostat -xz 1\r\n\r\n# Memory analysis\r\nfree -m\r\nvmstat 1\r\n\r\n# Process analysis\r\nps aux | sort -rn -k 3,3 | head -n 10\r\n        <\/code><\/pre>\n
\u4f18\u5316\u6280\u672f<\/strong><\/h2>\n
\u5728\u786e\u5b9a\u6839\u672c\u539f\u56e0\u540e\uff0c\u5b9e\u65bd\u8fd9\u4e9b\u4f18\u5316\u7b56\u7565\uff1a<\/p>\n
\n
TCP\u5806\u6808\u4f18\u5316\uff1a\n
\r\n# Add to \/etc\/sysctl.conf\r\nnet.ipv4.tcp_fin_timeout = 30\r\nnet.ipv4.tcp_keepalive_time = 1200\r\nnet.ipv4.tcp_max_syn_backlog = 8192\r\nnet.ipv4.tcp_tw_reuse = 1\r\n                <\/code><\/pre>\n<\/li>\n
DNS\u89e3\u6790\u589e\u5f3a\uff1a\n
\r\n# Edit \/etc\/resolv.conf\r\nnameserver 8.8.8.8\r\nnameserver 1.1.1.1\r\noptions timeout:2 attempts:3\r\n                <\/code><\/pre>\n<\/li>\n<\/ol>\n
\u9884\u9632\u63aa\u65bd<\/strong><\/h2>\n
\u5b9e\u65bd\u8fd9\u4e9b\u76d1\u63a7\u811a\u672c\u4ee5\u9884\u9632\u672a\u6765\u7684\u8bbf\u95ee\u95ee\u9898\uff1a<\/p>\n
\r\n#!\/bin\/bash\r\n# Server Health Check Script\r\nwhile true; do\r\n    # Check CPU load\r\n    CPU_LOAD=$(top -bn1 | grep \"Cpu(s)\" | awk '{print $2}')\r\n    \r\n    # Check memory usage\r\n    MEM_FREE=$(free -m | awk 'NR==2{print $4}')\r\n    \r\n    # Check disk space\r\n    DISK_USAGE=$(df -h \/ | awk 'NR==2{print $5}' | sed 's\/%\/\/')\r\n    \r\n    # Log if thresholds exceeded\r\n    if (( $(echo \"$CPU_LOAD > 80\" | bc -l) )) || [ $MEM_FREE -lt 500 ] || [ $DISK_USAGE -gt 90 ]; then\r\n        echo \"$(date): Resource threshold exceeded\" >> \/var\/log\/server-health.log\r\n    fi\r\n    \r\n    sleep 300\r\ndone\r\n        <\/code><\/pre>\n
\u9ad8\u7ea7\u7f51\u7edc\u4f18\u5316\u6280\u672f<\/strong><\/h2>\n
\u5bf9\u4e8e\u9047\u5230\u6301\u7eed\u8bbf\u95ee\u95ee\u9898\u7684\u9999\u6e2f\u670d\u52a1\u5668\uff0c\u5b9e\u65bd\u9ad8\u7ea7\u7f51\u7edc\u4f18\u5316\u6280\u672f\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u6027\u80fd\u3002\u8003\u8651\u4ee5\u4e0b\u6280\u672f\u65b9\u6cd5\uff1a<\/p>\n
1. TCP BBR\u5b9e\u65bd<\/h3>\n
Google\u7684BBR\u62e5\u585e\u63a7\u5236\u7b97\u6cd5\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u541e\u5410\u91cf\u5e76\u51cf\u5c11\u5ef6\u8fdf\u3002\u4ee5\u4e0b\u662f\u5b9e\u65bd\u65b9\u6cd5\uff1a<\/p>\n
\r\n# Check if BBR is available\r\nmodprobe tcp_bbr\r\necho \"tcp_bbr\" >> \/etc\/modules-load.d\/modules.conf\r\n\r\n# Enable BBR\r\necho \"net.core.default_qdisc=fq\" >> \/etc\/sysctl.conf\r\necho \"net.ipv4.tcp_congestion_control=bbr\" >> \/etc\/sysctl.conf\r\nsysctl -p\r\n\r\n# Verify BBR is running\r\nsysctl net.ipv4.tcp_congestion_control\r\n        <\/code><\/pre>\n
2. \u7f51\u7edc\u63a5\u53e3\u8c03\u4f18<\/h3>\n
\u4f7f\u7528\u8fd9\u4e9b\u53c2\u6570\u4f18\u5316\u7f51\u7edc\u63a5\u53e3\u6027\u80fd\uff1a<\/p>\n
\r\n# Add to \/etc\/sysctl.conf\r\nnet.core.rmem_max = 16777216\r\nnet.core.wmem_max = 16777216\r\nnet.ipv4.tcp_rmem = 4096 87380 16777216\r\nnet.ipv4.tcp_wmem = 4096 65536 16777216\r\nnet.ipv4.tcp_mtu_probing = 1\r\n        <\/code><\/pre>\n
\u8d1f\u8f7d\u5747\u8861\u7b56\u7565<\/strong><\/h2>\n
\u5728\u5904\u7406\u9999\u6e2f\u670d\u52a1\u5668\u73af\u5883\u4e2d\u7684\u9ad8\u6d41\u91cf\u573a\u666f\u65f6\uff0c\u5b9e\u65bd\u9002\u5f53\u7684\u8d1f\u8f7d\u5747\u8861\u81f3\u5173\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5b9e\u7528\u7684HAProxy\u914d\u7f6e\u793a\u4f8b\uff1a<\/p>\n
\r\nglobal\r\n    log \/dev\/log local0\r\n    maxconn 4096\r\n    user haproxy\r\n    group haproxy\r\n\r\ndefaults\r\n    log     global\r\n    mode    http\r\n    option  httplog\r\n    option  dontlognull\r\n    retries 3\r\n    timeout connect 5s\r\n    timeout client  30s\r\n    timeout server  30s\r\n\r\nfrontend http_front\r\n    bind *:80\r\n    stats uri \/haproxy?stats\r\n    default_backend http_back\r\n\r\nbackend http_back\r\n    balance roundrobin\r\n    cookie SERVERID insert indirect nocache\r\n    server server1 10.0.0.1:80 check cookie server1\r\n    server server2 10.0.0.2:80 check cookie server2\r\n        <\/code><\/pre>\n
\u5b89\u5168\u8003\u8651<\/strong><\/h2>\n
\u670d\u52a1\u5668\u8bbf\u95ee\u95ee\u9898\u6709\u65f6\u53ef\u80fd\u4e0e\u5b89\u5168\u76f8\u5173\u3002\u5b9e\u65bd\u8fd9\u4e9b\u5b89\u5168\u63aa\u65bd\u4ee5\u9632\u6b62\u672a\u7ecf\u6388\u6743\u7684\u8bbf\u95ee\uff0c\u540c\u65f6\u4fdd\u6301\u53ef\u7528\u6027\uff1a<\/p>\n
1. Fail2Ban\u914d\u7f6e<\/h3>\n
\r\n# \/etc\/fail2ban\/jail.local\r\n[sshd]\r\nenabled = true\r\nport = ssh\r\nfilter = sshd\r\nlogpath = \/var\/log\/auth.log\r\nmaxretry = 3\r\nfindtime = 300\r\nbantime = 3600\r\n        <\/code><\/pre>\n
2. ModSecurity\u5b9e\u65bd<\/h3>\n
\u5bf9\u4e8e\u7f51\u7edc\u670d\u52a1\u5668\uff0c\u4f7f\u7528\u8fd9\u4e9b\u57fa\u672c\u89c4\u5219\u5b9e\u65bdModSecurity\uff1a<\/p>\n
\r\n# Basic ModSecurity configuration\r\nSecRuleEngine On\r\nSecRequestBodyAccess On\r\nSecResponseBodyAccess On\r\nSecResponseBodyMimeType text\/plain text\/html text\/xml\r\nSecDataDir \/tmp\/modsecurity\r\nSecAuditEngine RelevantOnly\r\nSecAuditLog \/var\/log\/modsec_audit.log\r\n        <\/code><\/pre>\n
\u6027\u80fd\u76d1\u63a7\u5de5\u5177<\/strong><\/h2>\n
\u4f7f\u7528\u8fd9\u4e9b\u5de5\u5177\u5b9e\u65bd\u5168\u9762\u76d1\u63a7\uff1a<\/p>\n
\n
Prometheus\u7528\u4e8e\u6307\u6807\u6536\u96c6<\/li>\n
Grafana\u7528\u4e8e\u53ef\u89c6\u5316<\/li>\n
Node Exporter\u7528\u4e8e\u7cfb\u7edf\u6307\u6807<\/li>\n
Blackbox Exporter\u7528\u4e8e\u7aef\u70b9\u76d1\u63a7<\/li>\n<\/ol>\n
\u4ee5\u4e0b\u662f\u57fa\u672c\u7684Prometheus\u914d\u7f6e\uff1a<\/p>\n
\r\nglobal:\r\n  scrape_interval: 15s\r\n  evaluation_interval: 15s\r\n\r\nscrape_configs:\r\n  - job_name: 'node'\r\n    static_configs:\r\n      - targets: ['localhost:9100']\r\n\r\n  - job_name: 'blackbox'\r\n    metrics_path: \/probe\r\n    params:\r\n      module: [http_2xx]\r\n    static_configs:\r\n      - targets:\r\n        - http:\/\/your-hong-kong-server.com\r\n    relabel_configs:\r\n      - source_labels: [__address__]\r\n        target_label: __param_target\r\n      - source_labels: [__param_target]\r\n        target_label: instance\r\n      - target_label: __address__\r\n        replacement: localhost:9115\r\n        <\/code><\/pre>\n
\u707e\u96be\u6062\u590d\u8ba1\u5212<\/strong><\/h2>\n
\u4f7f\u7528\u8fd9\u4e9b\u5173\u952e\u7ec4\u4ef6\u5b9e\u65bd\u5f3a\u5927\u7684\u707e\u96be\u6062\u590d\u8ba1\u5212\uff1a<\/p>\n
\n
\u4f7f\u7528rsnapshot\u7b49\u5de5\u5177\u5b9a\u671f\u7cfb\u7edf\u5feb\u7167<\/li>\n
\u5177\u6709\u81ea\u52a8\u6545\u969c\u8f6c\u79fb\u7684\u6570\u636e\u5e93\u590d\u5236<\/li>\n
\u4f7f\u7528Ansible\u6216Chef\u8fdb\u884c\u914d\u7f6e\u7ba1\u7406<\/li>\n
\u81ea\u52a8\u6062\u590d\u811a\u672c<\/li>\n<\/ol>\n
\u603b\u4e4b\uff0c\u4fdd\u6301\u9999\u6e2f\u670d\u52a1\u5668\u7684\u53ef\u9760\u8bbf\u95ee\u9700\u8981\u5168\u9762\u4e86\u89e3\u7f51\u7edc\u57fa\u7840\u8bbe\u65bd\u3001\u7cfb\u7edf\u4f18\u5316\u548c\u5b89\u5168\u63aa\u65bd\u3002\u5b9a\u671f\u76d1\u63a7\u3001\u4e3b\u52a8\u7ef4\u62a4\u548c\u5b9e\u65bd\u8fd9\u4e9b\u6280\u672f\u89e3\u51b3\u65b9\u6848\u5c06\u6709\u52a9\u4e8e\u786e\u4fdd\u670d\u52a1\u5668\u79df\u7528\u548c\u670d\u52a1\u5668\u6258\u7ba1\u73af\u5883\u4e2d\u7684\u6700\u4f73\u670d\u52a1\u5668\u6027\u80fd\u3002<\/p>\n
\u6545\u969c\u6392\u9664\u5de5\u4f5c\u6d41\u7a0b<\/strong><\/h2>\n
\u5904\u7406\u8bbf\u95ee\u95ee\u9898\u65f6\uff0c\u8bf7\u9075\u5faa\u4ee5\u4e0b\u7cfb\u7edf\u65b9\u6cd5\uff1a<\/p>\n
\n
\u8fd0\u884c\u521d\u59cb\u8bca\u65ad\u811a\u672c<\/li>\n
\u5206\u6790\u7f51\u7edc\u6307\u6807<\/li>\n
\u68c0\u67e5\u7cfb\u7edf\u8d44\u6e90<\/li>\n
\u9a8c\u8bc1\u9632\u706b\u5899\u89c4\u5219<\/li>\n
\u5b9e\u65bd\u4f18\u5316<\/li>\n
\u76d1\u63a7\u6539\u8fdb\u60c5\u51b5<\/li>\n<\/ol>\n
\u5bf9\u4e8e\u9999\u6e2f\u670d\u52a1\u5668\u8bbf\u95ee\u95ee\u9898\uff0c\u65e0\u8bba\u662f\u5728\u670d\u52a1\u5668\u79df\u7528\u8fd8\u662f\u670d\u52a1\u5668\u6258\u7ba1\u73af\u5883\u4e2d\uff0c\u8fd9\u79cd\u6280\u672f\u65b9\u6cd5\u90fd\u80fd\u786e\u4fdd\u7cfb\u7edf\u6027\u5730\u89e3\u51b3\u95ee\u9898\u3002\u8bb0\u4f4f\u5728\u5b9e\u65bd\u4efb\u4f55\u7cfb\u7edf\u7ea7\u4fee\u6539\u4e4b\u524d\u8bb0\u5f55\u6240\u6709\u66f4\u6539\u5e76\u7ef4\u62a4\u5b9a\u671f\u5907\u4efd\u3002<\/p>\n
[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"
[vc_row][vc_column][vc_column_text css=””] \u968f\u7740\u7f51\u7edc\u57fa\u7840\u8bbe\u65bd\u7684\u53d1\u5c55\uff0c\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u548c\u670d\u52a1\u5668\u6258\u7ba1\u8bbe\u65bd\u4e2d\u7684\u670d\u52a1\u5668\u8bbf\u95ee\u95ee\u9898\u53d8\u5f97\u8d8a\u6765\u8d8a\u590d\u6742\u3002\u8fd9\u4efd\u5168\u9762\u7684\u6280\u672f\u6307\u5357\u6df1\u5165\u63a2\u8ba8\u4e86\u8bca\u65ad\u548c\u89e3\u51b3\u670d\u52a1\u5668\u53ef\u8bbf\u95ee\u6027\u95ee\u9898\u7684\u65b9\u6cd5\uff0c\u91cd\u70b9\u4e3aIT\u4e13\u4e1a\u4eba\u5458\u548c\u7cfb\u7edf\u7ba1\u7406\u5458\u63d0\u4f9b\u5b9e\u7528\u89e3\u51b3\u65b9\u6848\u3002 \u4e86\u89e3\u5e38\u89c1\u8bbf\u95ee\u95ee\u9898 \u5728\u6df1\u5165\u89e3\u51b3\u65b9\u6848\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u5148\u68c0\u67e5\u8bbf\u95ee\u95ee\u9898\u901a\u5e38\u51fa\u73b0\u7684\u6280\u672f\u5c42\u9762\u3002\u5728\u7f51\u7edc\u5c42\u9762\uff0c\u95ee\u9898\u5f80\u5f80\u4ee5\u8fd9\u4e9b\u5f62\u5f0f\u8868\u73b0\uff1a TCP\u8fde\u63a5\u8d85\u65f6 \u9ad8\u5ef6\u8fdf\u5cf0\u503c \u6570\u636e\u5305\u4e22\u5931\u7387>1% DNS\u89e3\u6790\u5931\u8d25 \u521d\u6b65\u8bca\u65ad \u8ba9\u6211\u4eec\u4ece\u7cfb\u7edf\u5316\u7684\u65b9\u6cd5\u5f00\u59cb\u8bca\u65ad\u670d\u52a1\u5668\u8bbf\u95ee\u95ee\u9898\u3002\u4ee5\u4e0b\u662f\u7528\u4e8e\u521d\u6b65\u8bca\u65ad\u7684bash\u811a\u672c\uff1a #!\/bin\/bash SERVER_IP=”your_server_ip” echo “Running comprehensive diagnostics…” # Check basic connectivity ping -c 4 $SERVER_IP # TCP port scan nc -zv $SERVER_IP 22 80 443 2>&1 # Trace route traceroute $SERVER_IP # DNS resolution check dig +short $SERVER_IP # Check for packet loss mtr -n […]<\/p>\n
Read More…<\/a><\/p>\n","protected":false},"author":2,"featured_media":20591,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[62],"tags":[5360,5350,5351,5352,2924],"class_list":["post-20597","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hong-kong-dedicated-server-sc","tag-5360","tag-hong-kong-server-access-sc","tag-server-troubleshooting-sc","tag-colocation-maintenance-sc","tag-network-diagnostics-sc"],"acf":[],"yoast_head":"\n