TroubleShooting: RHEL 7.2 に MySQL にインストール失敗。パッケージ見つからない

見つからない？

[centos@hdp-2 ~]$ sudo yum install mysql-community-release
Loaded plugins: fastestmirror
HDP-2.6-repo-1                                                                                   | 2.9 kB  00:00:00
HDP-UTILS-1.1.0.22-repo-1                                                                        | 2.9 kB  00:00:00
ambari-2.6.1.3                                                                                   | 2.9 kB  00:00:00
base                                                                                             | 3.6 kB  00:00:00
extras                                                                                           | 3.4 kB  00:00:00
updates                                                                                          | 3.4 kB  00:00:00
Loading mirror speeds from cached hostfile
 * base: centos-distro.1gservers.com
 * extras: mirrors.sonic.net
 * updates: repo1.sea.innoscale.net
No package mysql-community-release available.
Error: Nothing to do

対策：リポジトリをインストール

[centos@zzeng-hdp-2 ~]$ sudo rpm -ivh http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
Retrieving http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
warning: /var/tmp/rpm-tmp.hGWJu5: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing...                          ################################# [100%]
Updating / installing...
   1:mysql57-community-release-el7-8  ################################# [100%]
[centos@zzeng-hdp-2 ~]$

[centos@zzeng-hdp-2 ~]$ sudo yum install mysql-community-release
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: repos.lax.quadranet.com
 * extras: centos.mirror.ndchost.com
 * updates: mirror.sjc02.svwh.net
Resolving Dependencies
--> Running transaction check
---> Package mysql-community-release.noarch 0:el7-7 will be installed
--> Processing Conflict: mysql57-community-release-el7-8.noarch conflicts mysql-community-release
--> Restarting Dependency Resolution with new changes.
--> Running transaction check
---> Package mysql57-community-release.noarch 0:el7-8 will be updated
---> Package mysql57-community-release.noarch 0:el7-10 will be an update
--> Processing Conflict: mysql57-community-release-el7-10.noarch conflicts mysql-community-release
--> Finished Dependency Resolution
Error: mysql57-community-release conflicts with mysql-community-release-el7-7.noarch
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest
[centos@zzeng-hdp-2 ~]$

MySQL 5.6で対応：

* https://community.hortonworks.com/content/kbentry/174251/centos-72-ambari-2613-hdp-264-got-mysql-install-er.html
sudo yum -y install http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm