DNS for Services and Pods
Your workload can discover Services within your cluster using DNS; this page explains how that works. Kubernetes creates DNS records for Services and Pods. You can contact Services with consistent DNS names instead of IP addresses. Kubernetes publishes information about Pods and Services which is used to program DNS. Kubelet configures Pods' DNS so that running containers can lookup Services by na
Basics_of_DNS_that_application_engineers_should_know - Speaker Deck
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CNAME ã‚’å·¡ã‚‹ 2/3 ã®ã‚¸ãƒ¬ãƒ³ãƒž - 鷲ノ巣
当ブãƒã‚°ã‚’ã”æ„›èªé ‚ã„ã¦ã„ã‚‹æ–¹ã§ã‚ã‚Œã°ã€å½“然ã”å˜çŸ¥ãªã„ã“ã¨ã¨æ€ã„ã¾ã™ãŒã€ä¿ºã¯ DNS ãŒå¤§å¥½ãã§ã™ã€‚ ã¨ã¯è¨€ã£ã¦ã‚‚ã€DNS サーãƒãƒ¼ã®æ§‹ç¯‰ã¨ã‹é‹ç”¨ã«è©³ã—ã„ã‚ã‘ã§ã‚‚ã€æ”»æ’ƒã«å¯¾æŠ—ã™ã‚‹æ–¹æ³•ã‚’知ã£ã¦ã„ã‚‹ã‚ã‘ã§ã‚‚ã‚ã‚Šã¾ã›ã‚“。 ã‚„ã£ãŸã“ã¨ãŒã‚ã‚‹ã®ã¯ã€ã›ã„ãœã„ã€ãƒ¬ãƒ³ã‚¿ãƒ« DNS サーãƒãƒ¼ã§ã‚¾ãƒ¼ãƒ³å®šç¾©ãƒ•ã‚¡ã‚¤ãƒ«ã‚’書ã„ã¦éŠã¶ãらã„ã®ã‚‚ã®ã§ã™ã€‚ 昨今ã¯ã€DNSSEC ã§éŠã³ãŸã„ã®ã§ã™ãŒã€ãã®ãŸã‚ã®ç’°å¢ƒãŒç„¡ãã€æ‚²ã—ã¿ã«æš®ã‚Œã¦ã„ã¾ã™ã€‚ 閑話休題。 タイトル㮠2/3 ã®ã‚¸ãƒ¬ãƒ³ãƒžã¨ã„ã†ã®ã¯ã€DNS ã®é‹ç”¨ã«ãŠã„ã¦æˆç«‹ã•ã›ãŸã„ã€ã¨ã‚ã‚‹ 3 ã¤ã®æ€§è³ªã®ã†ã¡ã€åŒæ™‚ã«æˆç«‹ã§ãã‚‹ã®ã¯ 2 ã¤ã¾ã§ã§ã€3 ã¤å…¨éƒ¨ã‚’æˆã‚Šç«‹ãŸã›ã‚‹ã®ã¯ä¸å¯èƒ½ã ã€ã¨ã„ã†ã“ã¨ã‚’指ã—ã¦ã„ã¾ã™ã€‚ ãã® 3 ã¤ã®æ€§è³ªã¨ã„ã†ã®ã¯ã€ Zone Apex ã«ã‚ˆã‚‹ã‚¢ã‚¯ã‚»ã‚¹ DNS サーãƒãƒ¼ã®ã‚¢ã‚¦ãƒˆã‚½ãƒ¼ã‚·ãƒ³ã‚° 変動ã™ã‚‹ IP アドレス ã§ã™ã€‚ ã“ã†ã„ã†ã®ã€ä½•ã¦è¨€ã†ã‚“ã§ã—ょã†
Amazon VPC 㮠DHCP オプションセット - Amazon Virtual Private Cloud
VPC 内ã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãƒ‡ãƒã‚¤ã‚¹ã¯ Dynamic Host Configuration Protocol (DHCP) を使用ã—ã¾ã™ã€‚DHCP オプションセットを使用ã™ã‚‹ã¨ã€ä»®æƒ³ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯å†…ã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯æ§‹æˆã®æ¬¡ã®å´é¢ã‚’制御ã§ãã¾ã™ã€‚ VPC 内ã®ãƒ‡ãƒã‚¤ã‚¹ã§ä½¿ç”¨ã•ã‚Œã‚‹ DNS サーãƒãƒ¼ã€ãƒ‰ãƒ¡ã‚¤ãƒ³åã€ã¾ãŸã¯ Network Time Protocol (NTP) サーãƒãƒ¼ã€‚ DNS 解決㌠VPC ã§æœ‰åŠ¹ã‹ã©ã†ã‹ã€‚ DHCP ã¨ã¯ TCP/IP ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ä¸Šã®ã™ã¹ã¦ã®ãƒ‡ãƒã‚¤ã‚¹ã«ã¯ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚’介ã—ã¦é€šä¿¡ã™ã‚‹ãŸã‚ã® IP アドレスãŒå¿…è¦ã§ã™ã€‚以å‰ã¯ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯å†…ã®å„デãƒã‚¤ã‚¹ã« IP アドレスを手動ã§å‰²ã‚Šå½“ã¦ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã—ãŸã€‚ç¾åœ¨ã€IP アドレスã¯ã€Dynamic Host Configuration Protocol (DHCP) を使用ã—㦠DHCP サーãƒãƒ¼ã«ã‚ˆã£ã¦å‹•çš„ã«å‰²ã‚Šå½“
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CDNãŒå˜ä¸€éšœå®³ç‚¹ã«ãªã‚‰ãªã„よã†ã«ã™ã‚‹ãŸã‚㫠ヌーラボã§ã¯ 2010 å¹´Â Cacoo ã®å•†ç”¨ã‚µãƒ¼ãƒ“スã®é–‹å§‹ã«åˆã‚ã›ã¦ AWS ã«ãŠã‘ã‚‹é‹ç”¨ã‚’開始ã—ã¾ã—ãŸã€‚当時ã€é‹ç”¨ç’°å¢ƒã¨ã—㦠AWS を採択ã™ã‚‹æ±ºã‚手ã®ä¸€ã¤ã«ãªã£ãŸã®ãŒ CloudFront ã§ã—ãŸã€‚ãã®å¾Œã‚‚ç€ã€…ã¨ã‚¨ãƒƒã‚¸ãƒã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã¯å¢—ãˆã€ç‹¬è‡ªãƒ‰ãƒ¡ã‚¤ãƒ³ã®ã‚µãƒãƒ¼ãƒˆãªã©é…力的ãªæ©Ÿèƒ½ã‚‚æä¾›ã•ã‚Œã€ä»Šã§ã¯ãƒŒãƒ¼ãƒ©ãƒœã®å…¨ã‚µãƒ¼ãƒ“スã®é™çš„ファイルã®é…ä¿¡ã§åˆ©ç”¨ã—ã¦ã„ã‚‹ã€ç„¡ãã¦ã¯ãªã‚‰ãªã„サービスã¨ãªã£ã¦ã„ã¾ã™ã€‚ ãã®é…力ã®åé¢ã€CloudFront ã®éšœå®³ã¯ã€ã‚¢ãƒ—リケーションãã®ã‚‚ã®ã«å•é¡ŒãŒãªãã¦ã‚‚ã€ä»¥ä¸‹ã®ã‚ˆã†ãªè¡¨ç¤ºãŒå´©ã‚ŒãŸç”»é¢ãŒè¡¨ç¤ºã•ã‚Œã¦ã€ãƒ¦ãƒ¼ã‚¶ãŒå…¨ãサービスを使ãˆãªããªã‚‹ã¨ã„ã†ã€ãã®å½±éŸ¿ãŒéžå¸¸ã«å¤§ãã„ã‚‚ã®ã§ã™ã€‚ã¾ãŸéšœå®³ã®åŽŸå› ㌠DNS ã‚„ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã®çµŒè·¯ã«ãŠã‘ã‚‹å•é¡Œã¨ã„ã£ãŸã€ç§ãŸã¡ãŒç›´æŽ¥è§£æ±ºã—ã«ãã„é ˜åŸŸã«ã‚ã‚‹ã“ã¨ã‚‚ã—ã°ã—ã°ã§ã™ã€‚ ãŸã ã€ã©ã‚“ãªäº‹æƒ…ã§ã‚ã‚Œã€éšœ
Roadworkerã¦ã‚™ã¯ã—ã‚™ã‚る大é‡DNS移行 / Codenize Meetup
Codenize Meetup https://codenize.connpass.com/event/14342/
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Unboundã¨NSDã®ç´¹ä»‹ã€€BIND9ã¨ã®æ¯”較編
1. Unboundã¨NSDã®ç´¹ä»‹ BIND9ã¨ã®æ¯”較編 日本Unboundãƒ¦ãƒ¼ã‚¶ä¼šã€€æ± å¤§äº® (平会員) オープンソースカンファレンス 2014 Tokyo/Fall 2014/10/19 1 2. 日本Unboundユーザ会㫠ã¤ã„㦠• æ»æ¾¤ã•ã‚“ (@ttkzw) ãŒé‹å–¶ã•ã‚Œã¦ã‚‹è¬Žã®ä¼š • http://unbound.jp • Unboundã‚„NSDã‚„ldnsã®ãƒžãƒ‹ãƒ¥ã‚¢ãƒ«ã®ç¿»è¨³ç‰ • 本家 (http://unbound.net) ã‹ã‚‰ã‚‚å…¬èªã•ã‚Œã¦ã‚‹ • ç§ã¯ãƒ¦ãƒ¼ã‚¶ä¼šã®MLã«å‚åŠ ã—ã¦ã‚‹ã ã‘…… 2
DNSã®è©•ä¾¡ã¨è¨ˆæ¸¬ã®è©±
DNSã®è©•ä¾¡ã¨è¨ˆæ¸¬ã®è©± Internet Week 2013 SCSKæ ªå¼ä¼šç¤¾ æœéƒ¨ æˆæµ© 1 内容 • DNSストレスツール Nominum dnsperf/resperfã®ç´¹ä»‹ – dnsperf 㨠resperf ã®é•ã„ • è² è·ã®ç”Ÿæˆæ–¹æ³• – エラーメッセージ対処 • åŒã˜DNSサーãƒ(unbound)ã«å¯¾ã—ã¦ã€dnsperf, resperfã§ã‹ã‘ãŸå ´åˆã€åŒã˜ çµæžœã«ãªã‚‹? – ケーススタディ • dnsperf, resperf オプション指定例ã€çµæžœãƒ•ã‚¡ã‚¤ãƒ« 2 Nominum dnsperf/resperf • dnsperf – 権å¨ã‚µãƒ¼ãƒã‚„ã€LAN環境ã§ã®ã‚ャッシュサーãƒã®ãƒ† ストã§ã¯O.K. – ã‚ャッシュã®ãƒ†ã‚¹ãƒˆã§WAN回線を使用ã—ãŸå ´åˆã¯çµ æžœãŒä¸å分ã«ãªã‚‹å¯èƒ½æ€§ã‚ã‚Š • レスãƒãƒ³ã‚¹çŠ¶æ³ã§dnsperfã®å‡ºã™è² è·(qps)ãŒå¤‰åŒ–ã™ã‚‹ãŸã‚ • resperf –
Installing PowerDNS (With MySQL Backend) And Poweradmin On Debian Etch
Installing PowerDNS (With MySQL Backend) And Poweradmin On Debian EtchVersion 1.0 Author: Falko Timme This article shows how you can install the PowerDNS nameserver (with MySQL backend) and the Poweradmin control panel for PowerDNS on a Debian Etch system. PowerDNS is a high-performance, authoritative-only nameserver - in the setup described here it will read the DNS records from a MySQL database
DNSã‚ャッシュサームãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã®å‹˜æ‰€
2. ã“ã®æ–‡æ›¸ã«ã¤ã„㦠• ã‚ャッシュサーãƒ(フルリゾルãƒ)ã¨ã—ã¦å‹•ä½œã•ã›ãŸ Unbound・BIND9両方ã«ã¤ã„ã¦ã€å¤§è¦æ¨¡ç’°å¢ƒã«é©ã—㟠ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã¨ã—ã¦ãƒœãƒˆãƒ«ãƒãƒƒã‚¯ã«ãªã‚Šã‚„ã™ã„部分を紹介 • 対象ver㯠Unbound 1.4.22ï¼BIND 9.9.5 を基準ã¨ã—㦠ã„ã‚‹ãŒã€ãれ以å‰ã§ã‚‚åŒæ§˜ã®è¨å®šãŒå¯èƒ½ãªå ´åˆãŒã‚ã‚‹ • DNS権å¨ã‚µãƒ¼ãƒã¯å¯¾è±¡å¤– • OSã‚„ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ç’°å¢ƒã®ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°é …ç›®ã€æ€§èƒ½ãƒãƒ¥ãƒ¼ ニング以外ã®ãŠã™ã™ã‚è¨å®šã‚‚åˆã‚ã›ã¦ç´¹ä»‹ 2 3. ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã®å¿…è¦æ€§ • Unbound/BIND9ã‚„OSã®ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆè¨å®šã¯ã€ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã®æ€§èƒ½ã‚’最大ã«ç™º æ®ã™ã‚‹è¨å®šã«ãªã£ã¦ã„ãªã„ • é©åˆ‡ãªãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã‚’ã—ãªã„ã¨ã€CPU使用率ãŒå°‘ãªã„ã®ã«æ€§èƒ½ãŒé 打ã¡ï¼CPU ã°ã‹ã‚Šé£Ÿã£ã¦æ€§èƒ½ãŒä¸ŠãŒã‚‰ãªã„ã€ã¨ã„ã†çŠ¶æ³ã«é™¥ã‚‹ • 「è¨å®šã€ã¨ã¯ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢è³‡æºã®é…分方法 è¨å®šã¯ã€ã»ã¨ã‚“ã©ã®å ´åˆãƒªãƒŸãƒƒã‚¿
DMM inside
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GRC's | DNS Nameserver Performance Benchmark Â
Domain Name Speed Benchmark Are your DNS nameservers impeding your Internet experience? A unique, comprehensive, accurate & free Windows (and Linux/Wine) utility to determine the exact performance of local and remote DNS nameservers . . . “You can't optimize it until you can measure it†Now you CAN measure it!
PowerDNS vs tinydns Load Test | Phyber Communicates
Phyber has long maintained djbdns tinydns authoritative name servers. The simplicity of the design and the near fool proof replication model (with zero backend dependance) has made tinydns an ideal nameserver. Unfortunately djbdns has not seen a new release in years (although there is a healthy amount of patches available for it) and has for the most part sat idle. During the same period of time P
/etc/hosts ã¯ãƒ›ã‚¹ãƒˆæ•°ãŒå¢—ãˆã‚‹ã¨DNSよりé…ããªã‚‹
/etc/hosts ã«ãƒ›ã‚¹ãƒˆåを書ã„ã¦é…ã‚‹ã¨ã„ã†ã®ã¯ã€æ•°å°ã®ãƒžã‚·ãƒ³ã‚’管ç†ã™ã‚‹çŠ¶æ³ã§ã¯èª°ã—ã‚‚ã‚„ã£ãŸã“ã¨ãŒã‚ã‚‹ã¨æ€ã„ã¾ã™ã€‚DNSクエリãŒç™ºç”Ÿã—ãªã„ã®ã§ã¨ã¦ã‚‚æ—©ãã€ã¾ãŸå˜ä¸€éšœå®³ç‚¹ãŒç™ºç”Ÿã—ãªã„メリットãŒã‚ã‚Šã¾ã™ã€‚ãã®åé¢ã€å°æ•°ãŒå¢—ãˆã¦ãã‚‹ã¨å…¨éƒ¨ã‚’æ›´æ–°ã™ã‚‹ã®ãŒã¨ã¦ã‚‚大変ã«ãªã‚‹ã ã‘ã§ãªãã€è‡´å‘½çš„ãªé€Ÿåº¦ä½Žä¸‹ã‚’ã‚‚ãŸã‚‰ã—ã¾ã™ã€‚ テスト環境㯠OS: CentOS 6.4 64bit, Linux 3.10.2 CPU: Intel Core i7-2600 @ 3.4GHz ã§ã™ã€‚ テストã«ã¯ã²ãŸã™ã‚‰ getaddrinfo(3) ã—続ã‘るプãƒã‚°ãƒ©ãƒ を作æˆã—ã€åå‰ã‚’解決ã—ã¾ã—ãŸã€‚ /etc/hosts ã«ã¯ 10.234.130.1 host1301 10.234.130.2 host1302 10.234.130.3 host1303 ã®ã‚ˆã†ã«é©å½“ãªã‚¢ãƒ‰ãƒ¬ã‚¹ã¨ãƒ›ã‚¹ãƒˆåを並ã¹ãŸã‚‚ã®ã‚’作りã€åˆ©ç”¨ã—ã¾ã—ãŸã€‚ãª
DNS ã§ãƒ©ã‚¦ãƒ³ãƒ‰ãƒãƒ“ンã¯å½“ã¦ã«ãªã‚‰ãªã„。 - JULY’s diary
モãƒã‚¤ãƒ«ã§ã‚‚DNSラウンドãƒãƒ“ンã¯ã¡ã‚ƒã‚“ã¨å‹•ä½œã—ã¾ã™ã‹ï¼Ÿ PCã§ã‚ã‚Œã°ã€ã ã„ãŸã„ã®ãƒ–ラウザãŒå¯¾å¿œã—ã¦ã„ã‚‹ã¨èžãã¾ã™ãŒã€ãƒ¢ãƒã‚¤ãƒ«ã¯ã©ã†ãªã‚“ã§ã—ょã†ã‹ï¼Ÿ Aã€Bã€Cã¨ã„ã†ã‚µãƒ¼ãƒã‚’ラウンドãƒãƒ“ンã§å‹•ã‹ã—ãŸæ™‚ã«ã€BãŒæ»ã‚“ã ã¨ã—ã¾ã™ã€‚ ãã®å ´åˆã€PCã¯Bã«è¡Œã‹ãªããªã‚‹ã¨æ€ã„ã¾ã™ãŒã€æºå¸¯ã®å ´åˆã¯ã©ã†ãªã‚“ã§ã—ょã†ã‹ï¼Ÿ æºå¸¯ã¯ã‚ャリアã®ãƒ—ãƒã‚シ？ã‹ä½•ã‹ã‚’通ã£ã¦ã„ãã†ãªã®ã§ã€ã¡ã‚ƒã‚“ã¨å‹•ãã®ã‹ãŒæ°—ã«ãªã‚Šã¾ã™ã€‚ ã¾ãŸã€ãƒ©ã‚¦ãƒ³ãƒ‰ãƒãƒ“ンã®å¼±ç‚¹ã¯ä½•ã§ã™ã‹ï¼Ÿ 今ã®ã¨ã“ã‚æ°—ã¥ã„ã¦ã„ã‚‹ã®ã¯ã€å˜ã«æŒ¯ã‚Šåˆ†ã‘ã‚‹ã ã‘ã ã‹ã‚‰1å°ã«è² è·ãŒé›†ä¸ã™ã‚‹ã‹ã‚‚ã—ã‚Œãªã„ã“ã¨ãらã„ã—ã‹ãªã„ã§ã™ã€‚ 上ã®è³ªå•ã‚’見ã¦ã€ã€Œã‚ã‚Œã£ã€ãƒ©ã‚¦ãƒ³ãƒ‰ãƒãƒ“ンã£ã¦ã€ãƒ–ラウザã®ã‚ˆã†ãªã‚¢ãƒ—リケーションサイドã§å¯¾å¿œã™ã‚‹ã‚‚ã®ã ã£ã‘？ gethostbyname 辺りã§å‹æ‰‹ã«ã‚„ã£ã¦ã„ã¦ã€ã‚¢ãƒ—リå´ã¯æ¸¡ã•ã‚ŒãŸ IP ã§ç¹‹ãã ã‘ã§ã¯ï¼Ÿã€ã¨æ€ã£ã¦ã„ãŸã‚‰ã€ãã‚Œã¯ã€ã‚‚ã†å¤ã„話らã—ã„。 0000
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Lesser known DNS tools and BIND tricks
DNS トラブルシューティング
http://www.bedis.eu/benchmark/dns
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