dns

安装k8s coredns

由 |▌冷眼眸甩不掉的悲伤 提交于 2019-12-30 10:17:33
安装k8s coredns 1.coredns yaml下载地址 https://github.com/kubernetes/kubernetes/blob/e176e477195f92919724bd02f81e2b18d4477af7/cluster/addons/dns/coredns/coredns.yaml.sed 2.修改该文件的几个地方 1) 修改集群域名 data: Corefile: | .:53 { errors health ready kubernetes $DNS_DOMAIN in-addr.arpa ip6.arpa { //$DNS_DOMAIN 修改为集群的域名 ，可以从kubelet配置文件查看 pods insecure fallthrough in-addr.arpa ip6.arpa ttl 30 } prometheus :9153 forward . /etc/resolv.conf cache 30 loop reload loadbalance } 2）修改coredns 容器资源限制 containers: - name: coredns image: k8s.gcr.io/coredns:1.6.2 //修改下载地址 coredns/coredns:1.6.2 imagePullPolicy: IfNotPresent

checkdnsrr() returns wrong info

由 不想你离开。 提交于 2019-12-30 07:49:21
问题 $dname = "accurst.com"; $recordexists = checkdnsrr($dname, "ANY"); if ($recordexists) echo $dname." is taken. Sorry!<br>"; else echo $dname." is available!<br>"; this is an example domain that returns the wrong info. It says its available but the domain is a premium domain name of 2800 dollars is there any way for it to show that it's not available since it is not untied to anyone? in other words if I look up: accurstttt.com now that's available and accurst.com should say : not available i

possible to resolve DNS based on URL path

由 做~自己de王妃 提交于 2019-12-30 05:26:09
问题 My understanding is that there are certain advantages to putting two related sites under the same domain, as opposed to separate subdomains (for example sub-sites for different book genres). Two I can think of are using the same SSL cert, and SEO rankings. I'd like to have different paths for the same domain resolve to different IP addresses. For example example.com/a to 100.100.100.100 and example.com/b to 200.200.200.200 . I know this isn't possible with traditional DNS servers, but are

Querying the DNS service records to find the hostname and TCP/IP

由 余生长醉 提交于 2019-12-30 04:52:16
问题 In a paper about the Life Science Identifiers (see LSID Tester, a tool for testing Life Science Identifier resolution services), Dr Roderic DM Page wrote : Given the LSID urn:lsid**:ubio.org**:namebank:11815, querying the DNS for the SRV record for _lsid._tcp . ubio.org returns animalia.ubio.org:80 as the location of the ubio.org LSID service. I learned that I can link _lsid._tcp.ubio.org to animalia.ubio.org:80 using the host command on unix: host -t srv _lsid._tcp.ubio.org _lsid._tcp.ubio

how to check that the email id exist in domain without sending any mails using java

由 一笑奈何 提交于 2019-12-30 04:46:26
问题 Is there any way to verify where the email id exist in domain or not? I am having the following function: it checks only for valid domain, but i need to check for valid email address in domain without sending any mails. public boolean isValidEmailAddress(String email) { boolean result = true; try { InternetAddress emailAddr = new InternetAddress(email); emailAddr.validate(); } catch (AddressException ex) { result = false; } return result; } 回答1: Here is a source code that could do many type

marathon部署docker很方便,阶段性学习成果

由 ∥☆過路亽．° 提交于 2019-12-30 04:14:29
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 特意添加了luajit的docker容器, 发现无法使用dig解析到该容器对应的域名. 重启marathon-dns还是不行 检查/etc/resolv.conf里面没有marathon-dns的主机 所以加上,在使用dig测试 dig _luajit._tcp.marathon.mesos SRV 发现主机找到了. 来一张图, 来源： oschina 链接： https://my.oschina.net/u/1538135/blog/681431

host、dig、nslookup 查询DNS命令

由 只谈情不闲聊 提交于 2019-12-30 04:08:09
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> host 命令： 一般格式： host 域名 host -a 域名 常用选项： -a：相当于"-v -t any"。 -t type：指定要查询的记录类型。默认查询A、AAAA、MX记录。 -v：详细方式输出。 [root@BJ-IDC-NTP-002 ~]# host baidu.com baidu.com has address 220.181.57.217 baidu.com has address 111.13.101.208 baidu.com has address 123.125.114.144 baidu.com has address 180.149.132.47 baidu.com mail is handled by 20 mx1.baidu.com. baidu.com mail is handled by 20 jpmx.baidu.com. baidu.com mail is handled by 20 mx50.baidu.com. baidu.com mail is handled by 10 mx.n.shifen.com. [root@BJ-IDC-NTP-002 ~]# host -a baidu.com Trying "baidu.com" ;; ->>HEADER<<-

DNS主从同步

由 丶灬走出姿态 提交于 2019-12-30 04:03:08
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> DNS主从同步 DNS主服务器的配置 yum install bind -y vim /etc/named.conf // listen-on port 53 { 127.0.0.1; }; // allow-query { localhost; }; allow-transfer { 192.168.209.10;}; vim /etc/named.rfc1912.zones zone "xuepeng.com" in { type master; file "xuepeng.com.zone"; }; cd /var/named/ cp -p named.localhost xuepeng.com.zone vim xuepeng.com.zone systemctl start named DNS 从服务器的配置 yum install bind -y vim /etc/named.conf // listen-on port 53 { 127.0.0.1; }; // allow-query { localhost; }; allow-transfer { none; }; vim /etc/named.rfc1912.zones zone "xuepeng.com" in { type slave;

How to get the domain name without www, subdomain, and com/net/org/etc [duplicate]

由 泪湿孤枕 提交于 2019-12-30 03:28:08
问题 This question already has answers here : PHP Getting Domain Name From Subdomain (22 answers) Closed 11 months ago . I just need to get the domain name only form a url, (without com and everything else) example: I have: http://www.subdomain.domain1.com/ www.subdomain.domain2.net subdomain.subdomain2.domain3.org/ http://domain4.com I want to get with PHP: domain1 domain2 domain3 domain4 回答1: parse_url() with the "PHP_URL_HOST" argument then explode() on the "." and extract the penultimate

NoSQL你知多少？

由 喜夏-厌秋 提交于 2019-12-30 01:38:38
1.NoSQL是什么？ 　　NoSQL 是 Not Only SQL 的缩写，意即"不仅仅是SQL"的意思，泛指非关系型的数据库。强调Key-Value Stores和文档数据库的优点，而不是单纯的反对RDBMS。 　　NoSQL产品是传统关系型数据库的功能阉割版本，通过减少用不到或很少用的功能，来大幅度提高产品性能 2.NoSQL是怎么产生的？ 　　随着web2.0技术的发展，其促使了物联网和移动互联网迅猛发展。传统的关系数据库在应付web2.0网站，特别是超大规模和高并发的 SNS 类型的web2.0纯 动态网 站已经显得力不从心，暴露了很多难以克服的问题，而非关系型的数据库则由于其本身的特点得到了非常迅速的发展。 　　NoSQL数据库的产生就是为了解决大规模数据集合多重数据种类带来的挑战，尤其是大数据应用难题。 3.NoSQL的特点: 模式自由：NoSQL数据库不像传统的关系型数据库需要定义数据库，数据表等结构才可以存取数据，其在增删数据时不需要做数据的完整性检查。数据表中的每一条记录都可能有不同的属性和格式。 逆范式化：为了减少数据冗余，增强数据一致性，在关系型数据库设计时，要遵循 范式 要求，数据表至少要满足第三范式。这样多个表之间建立各种关联关系就不容易数据库的横向扩展；并且这些连接操作也会降低数据库的查询效率。而NoSQL数据库去除约束，放宽事务保障
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