CentOS6.x環境通過yum命令在線安裝或重裝zookeeper-server

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一、環境描述：

            在CentOS6.x系統環境下，使用yum命令的形式安裝zookeeper-server，由於我這里是重新安裝zookeeper-server，所以在正式開始之前我需要將原本的zookeeper服務進行卸載。這里使用的是yum在線方式，所以我就不搭建本地的yum源庫，也正因為如此要求實驗的CentOS6.x系統能夠連接到外網。

 

 

二、卸載zookeeper-server

      1、首先使用yum list installed命令查看本地安裝的服務列表，並找到需要卸載的部件名稱，如下圖：

root@localhost:/home/yang]#yum list installed

    2、使用yum remove 命令對zookeeper.x86_64進行卸載。注意，在使用yum remove命令時，命令后面所帶的字段名稱即為需要卸載的東西。

root@localhost:/home/yang]#yum remove zookeeper.x86_64

   當提示內容如下時，可直接yes即可。當出現Complete!時表示已經卸載成功了，不過還是建議使用yum list installed命令進行查看。

 

   

 

三、使用yum安裝zookeeper-server

    使用yum安裝zookeeper-server的命令真的很簡單。

root@localhost:/home/yang]#yum install zookeeper-server

    於是乎，直接運行了這個命令，結果卻讓我大吃一驚。下面的錯誤對於你來說是不是很熟悉呢？

Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
 * base: ftp.sjtu.edu.cn
 * extras: ftp.ksu.edu.tw
 * updates: ftp.ksu.edu.tw
http://ftp.sjtu.edu.cn/centos/6.10/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'ftp.sjtu.edu.cn'"
Trying other mirror.
http://ftp.stu.edu.tw/Linux/CentOS/6.10/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'ftp.stu.edu.tw'"
Trying other mirror.
http://ftp.yzu.edu.tw/Linux/CentOS/6.10/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'ftp.yzu.edu.tw'"
Trying other mirror.
http://mirrors.aliyun.com/centos/6.10/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.aliyun.com'"
Trying other mirror.
http://mirrors.huaweicloud.com/repository/centos/6.10/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.huaweicloud.com'"
Trying other mirror.
http://mirrors.neusoft.edu.cn/centos/6.10/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.neusoft.edu.cn'"
Trying other mirror.
http://mirrors.njupt.edu.cn/centos/6.10/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.njupt.edu.cn'"
Trying other mirror.
http://mirrors.shu.edu.cn/centos/6.10/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.shu.edu.cn'"
Trying other mirror.
http://mirrors.sohu.com/centos/6.10/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.sohu.com'"
Trying other mirror.
http://mirrors.tuna.tsinghua.edu.cn/centos/6.10/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.tuna.tsinghua.edu.cn'"
Trying other mirror.
https://archive.cloudera.com/cdh5/redhat/5/x86_64/cdh/5/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'archive.cloudera.com'"
Trying other mirror.
http://ftp.ksu.edu.tw/pub/CentOS/6.10/extras/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'ftp.ksu.edu.tw'"
Trying other mirror.
http://ftp.sjtu.edu.cn/centos/6.10/extras/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'ftp.sjtu.edu.cn'"
Trying other mirror.
http://mirror.lzu.edu.cn/centos/6.10/extras/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirror.lzu.edu.cn'"
Trying other mirror.
http://mirrors.aliyun.com/centos/6.10/extras/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.aliyun.com'"
Trying other mirror.
http://mirrors.huaweicloud.com/repository/centos/6.10/extras/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.huaweicloud.com'"
Trying other mirror.
http://mirrors.neusoft.edu.cn/centos/6.10/extras/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.neusoft.edu.cn'"
Trying other mirror.
http://mirrors.njupt.edu.cn/centos/6.10/extras/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.njupt.edu.cn'"
Trying other mirror.
http://mirrors.shu.edu.cn/centos/6.10/extras/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.shu.edu.cn'"
Trying other mirror.
http://mirrors.sohu.com/centos/6.10/extras/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.sohu.com'"
Trying other mirror.
http://mirrors.tuna.tsinghua.edu.cn/centos/6.10/extras/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.tuna.tsinghua.edu.cn'"
Trying other mirror.
http://ftp.ksu.edu.tw/pub/CentOS/6.10/updates/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'ftp.ksu.edu.tw'"
Trying other mirror.
http://ftp.sjtu.edu.cn/centos/6.10/updates/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'ftp.sjtu.edu.cn'"
Trying other mirror.
http://ftp.stu.edu.tw/Linux/CentOS/6.10/updates/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'ftp.stu.edu.tw'"
Trying other mirror.
http://mirrors.aliyun.com/centos/6.10/updates/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.aliyun.com'"
Trying other mirror.
http://mirrors.huaweicloud.com/repository/centos/6.10/updates/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.huaweicloud.com'"
Trying other mirror.
http://mirrors.neusoft.edu.cn/centos/6.10/updates/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.neusoft.edu.cn'"
Trying other mirror.
http://mirrors.njupt.edu.cn/centos/6.10/updates/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.njupt.edu.cn'"
Trying other mirror.
http://mirrors.shu.edu.cn/centos/6.10/updates/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.shu.edu.cn'"
Trying other mirror.
http://mirrors.sohu.com/centos/6.10/updates/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.sohu.com'"
Trying other mirror.
http://mirrors.tuna.tsinghua.edu.cn/centos/6.10/updates/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.tuna.tsinghua.edu.cn'"
Trying other mirror.
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package zookeeper-server.x86_64 0:3.4.5+cdh5.15.0+144-1.cdh5.15.0.p0.52.el5 will be installed
http://ftp.sjtu.edu.cn/centos/6.10/os/x86_64/repodata/5f7694d9c6c4a41dee56f51a965c3426ae2f685d6a9fb99d2e5a255c7bec0864-filelists.sqlite.bz2: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'ftp.sjtu.edu.cn'"
Trying other mirror.
http://ftp.stu.edu.tw/Linux/CentOS/6.10/os/x86_64/repodata/5f7694d9c6c4a41dee56f51a965c3426ae2f685d6a9fb99d2e5a255c7bec0864-filelists.sqlite.bz2: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'ftp.stu.edu.tw'"
Trying other mirror.
http://ftp.yzu.edu.tw/Linux/CentOS/6.10/os/x86_64/repodata/5f7694d9c6c4a41dee56f51a965c3426ae2f685d6a9fb99d2e5a255c7bec0864-filelists.sqlite.bz2: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'ftp.yzu.edu.tw'"
Trying other mirror.
http://mirrors.aliyun.com/centos/6.10/os/x86_64/repodata/5f7694d9c6c4a41dee56f51a965c3426ae2f685d6a9fb99d2e5a255c7bec0864-filelists.sqlite.bz2: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.aliyun.com'"
Trying other mirror.
http://mirrors.huaweicloud.com/repository/centos/6.10/os/x86_64/repodata/5f7694d9c6c4a41dee56f51a965c3426ae2f685d6a9fb99d2e5a255c7bec0864-filelists.sqlite.bz2: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.huaweicloud.com'"
Trying other mirror.
http://mirrors.neusoft.edu.cn/centos/6.10/os/x86_64/repodata/5f7694d9c6c4a41dee56f51a965c3426ae2f685d6a9fb99d2e5a255c7bec0864-filelists.sqlite.bz2: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.neusoft.edu.cn'"
Trying other mirror.
http://mirrors.njupt.edu.cn/centos/6.10/os/x86_64/repodata/5f7694d9c6c4a41dee56f51a965c3426ae2f685d6a9fb99d2e5a255c7bec0864-filelists.sqlite.bz2: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.njupt.edu.cn'"
Trying other mirror.
http://mirrors.shu.edu.cn/centos/6.10/os/x86_64/repodata/5f7694d9c6c4a41dee56f51a965c3426ae2f685d6a9fb99d2e5a255c7bec0864-filelists.sqlite.bz2: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.shu.edu.cn'"
Trying other mirror.
http://mirrors.sohu.com/centos/6.10/os/x86_64/repodata/5f7694d9c6c4a41dee56f51a965c3426ae2f685d6a9fb99d2e5a255c7bec0864-filelists.sqlite.bz2: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.sohu.com'"
Trying other mirror.
http://mirrors.tuna.tsinghua.edu.cn/centos/6.10/os/x86_64/repodata/5f7694d9c6c4a41dee56f51a965c3426ae2f685d6a9fb99d2e5a255c7bec0864-filelists.sqlite.bz2: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.tuna.tsinghua.edu.cn'"
Trying other mirror.
Error: failure: repodata/5f7694d9c6c4a41dee56f51a965c3426ae2f685d6a9fb99d2e5a255c7bec0864-filelists.sqlite.bz2 from base: [Errno 256] No more mirrors to try.
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles –nodigest

 

       這里就不兜圈子了，直接上解決的方法！我這里為了盡可能少的打shell字符，我直接進入/etc/yum.repos.d目錄中。可以看到，我這里/etc/yum.repos.d目錄下面，有幾個文件。CentOS-Base.repo是我們要更新的，至於其它的先不用管。

root@localhost:/home/yang]#cd /etc/yum.repos.d

 

       不過要說明的是，我這里由於是重新安裝，所以我打算連cloudera-cdh5.repo文件也更新一下，也就是先刪除再重新下載。如果是初次安裝zookeeper-server的話，cloudera-cdh5.repo文件應該是沒有的。

root@localhost:/etc/yum.repos.d]#rm -rf cloudera-cdh5.repo
root@localhost:/etc/yum.repos.d]#wget http://archive.cloudera.com/cdh5/redhat/6/x86_64/cdh/cloudera-cdh5.repo

 

      為了在使用yum命令時網速能更快些，我們需要將在線的yum源指定到國內的mirrors.163.com服務器上。在進行CentOS-Base.repo文件更新時，需要將CentOS-Base.repo文件，備份成以.backup為后綴的備份文件，以免我們更新的新文件用不了。

root@localhost:/etc/yum.repos.d]#mv CentOS-Base.repo CentOS-Base.repo.backup
root@localhost:/etc/yum.repos.d]#wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
root@localhost:/etc/yum.repos.d]#mv CentOS6-Base-163.repo CentOS-Base.repo

 

       到此為止，我想再次嘗試使用yum命令，對zookeeper-server進行安裝。可不幸運的是，還是報出了如下的錯誤，但相對於前者而言，似乎錯誤明顯改觀了許多。

Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
https://archive.cloudera.com/cdh5/redhat/6/x86_64/cdh/5/repodata/repomd.xml: [Errno 14] Peer cert cannot be verified or peer cert invalid
Trying other mirror.
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package zookeeper-server.x86_64 0:3.4.5+cdh5.15.0+144-1.cdh5.15.0.p0.52.el5 will be installed
base/filelists_db                                        | 6.4 MB     00:04     
https://archive.cloudera.com/cdh5/redhat/6/x86_64/cdh/5/repodata/filelists.xml.gz: [Errno 14] Peer cert cannot be verified or peer cert invalid
Trying other mirror.
Error: failure: repodata/filelists.xml.gz from cloudera-cdh5: [Errno 256] No more mirrors to try.
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles –nodigest

 

       由於它是Peer cert cannot be verified or peer cert invalid類型的錯誤，所以我們要修改一下/etc/yum.conf文件的配置內容。可直接編輯該文件

root@localhost:/etc/yum.repos.d]#vi /etc/yum.conf

   在文件中，添加如下內容：

sslverify=false

 

最后，需要將一些部件進行更新一下：

root@localhost:/etc/yum.repos.d]#yum check-update

 

 

最后的最后，我們可以正式對zookeeper-server進行下載安裝了：

root@localhost:/etc/yum.repos.d]#yum install zookeeper-server

   

當提示Is this ok [y/N]: 時，直接輸入y即可。

 

       此時，如果你的網速不是很好的話，建議你先去小賣部逛兩圈，順便路過奶茶店記得幫小編帶一杯不加糖的綠茶，雖然我也喝不到，不過隨便了。

     好了，經過漫長的等待之后，當提示以下內容時，恭喜你已經通過yum命令完成了zookeeper-server的安裝。

 

       最后，小編還想再啰嗦一點的就是，通過這種方式部署集群的話，效率顯然並不是很高！現在，你或許以為自己已經真正的部署了zookeeper-server而沾沾自喜，其實並不然。我們只是將zookeeper-server安裝到了我們的機器上，還沒有對其進行初始化和集群分配，也就是說並沒有對它進行部署和使用。

      值得啰嗦的是，zookeeper集群的搭建必須是奇數個機器哦，還有的就是最低要求也要3台服務器~