CentOS6.5でGroongaを利用するため、MySQL5.5インストールからやり直し。

Mroonga、Rroongaをインストールするために、MySQL5シリーズをインストールしようとしたんだけど、最新版だと弾かれてしまう。結局、Mroongaのインストール手順に書いてあったやり方にしたがって、MySQL5からインストールするのが一番の近道だった。ちょっと泣きたい気分。orz

手順を残しておく。
最初の作業。

# yum install centos-release-SCL
Loaded plugins: fastestmirror, refresh-packagekit, security
Determining fastest mirrors
 * base: www.ftp.ne.jp
 * extras: www.ftp.ne.jp
 * updates: www.ftp.ne.jp
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package centos-release-SCL.x86_64 10:6-5.el6.centos will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package                 Arch        Version                  Repository   Size
================================================================================
Installing:
 centos-release-SCL      x86_64      10:6-5.el6.centos        extras      3.9 k

Transaction Summary
================================================================================
Install       1 Package(s)

Total download size: 3.9 k
Installed size: 453 
Is this ok [y/N]: y
Downloading Packages:
centos-release-SCL-6-5.el6.centos.x86_64.rpm             | 3.9 kB     00:00    
警告: rpmts_HdrFromFdno: ヘッダ V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
Importing GPG key 0xC105B9DE:
 Userid : CentOS-6 Key (CentOS 6 Official Signing Key)
 Package: centos-release-6-5.el6.centos.11.1.x86_64 (@anaconda-CentOS-201311272149.x86_64/6.5)
 From   : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
Is this ok [y/N]: y
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : 10:centos-release-SCL-6-5.el6.centos.x86_64                  1/1
  Verifying  : 10:centos-release-SCL-6-5.el6.centos.x86_64                  1/1

Installed:
  centos-release-SCL.x86_64 10:6-5.el6.centos                                  

Complete!

次の作業。

# rpm -ivh http://packages.groonga.org/centos/groonga-release-1.1.0-1.noarch.rpm
http://packages.groonga.org/centos/groonga-release-1.1.0-1.noarch.rpm を取得中
警告: /var/tmp/rpm-tmp.2F4WFq: ヘッダ V4 DSA/SHA1 Signature, key ID 45499429: NOKEY
準備中...                ########################################### [100%]
   1:groonga-release        ########################################### [100%]
[root@centos6 ruby_on_rails]# yum makecache
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
 * base: www.ftp.ne.jp
 * extras: www.ftp.ne.jp
 * updates: www.ftp.ne.jp
base                                                     | 3.7 kB     00:00    
base/filelists_db                                        | 5.9 MB     00:06    
base/other_db                                            | 2.8 MB     00:02    
extras                                                   | 3.4 kB     00:00    
extras/filelists_db                                      |  11 kB     00:00    
extras/prestodelta                                       |  907 B     00:00    
extras/other_db                                          | 5.8 kB     00:00    
groonga                                                  | 2.5 kB     00:00    
groonga/filelists_db                                     | 172 kB     00:00    
groonga/primary_db                                       | 139 kB     00:00    
groonga/other_db                                         | 160 kB     00:00    
scl                                                      | 2.9 kB     00:00    
scl/filelists_db                                         | 1.2 MB     00:02    
scl/other_db                                             | 711 kB     00:01    
updates                                                  | 3.4 kB     00:00    
updates/filelists_db                                     | 2.3 MB     00:02    
updates/prestodelta                                      | 365 kB     00:00    
Metadata Cache Created

では、MySQL5をインストールする。

# yum install -y mysql55-mysql-server
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
 * base: www.ftp.ne.jp
 * extras: www.ftp.ne.jp
 * updates: www.ftp.ne.jp
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package mysql55-mysql-server.x86_64 0:5.5.37-1.2.el6.centos.alt will be installed
--> Processing Dependency: mysql55-mysql-libs(x86-64) = 5.5.37-1.2.el6.centos.alt for package: mysql55-mysql-server-5.5.37-1.2.el6.centos.alt.x86_64
--> Processing Dependency: mysql55-mysql(x86-64) = 5.5.37-1.2.el6.centos.alt for package: mysql55-mysql-server-5.5.37-1.2.el6.centos.alt.x86_64
--> Processing Dependency: perl-DBD-MySQL for package: mysql55-mysql-server-5.5.37-1.2.el6.centos.alt.x86_64
--> Processing Dependency: mysql55-runtime for package: mysql55-mysql-server-5.5.37-1.2.el6.centos.alt.x86_64
--> Running transaction check
---> Package mysql55-mysql.x86_64 0:5.5.37-1.2.el6.centos.alt will be installed
---> Package mysql55-mysql-libs.x86_64 0:5.5.37-1.2.el6.centos.alt will be installed
---> Package mysql55-runtime.x86_64 0:1-14.el6.centos.alt will be installed
--> Processing Dependency: policycoreutils-python for package: mysql55-runtime-1-14.el6.centos.alt.x86_64
---> Package perl-DBD-MySQL.x86_64 0:4.013-3.el6 will be installed
--> Running transaction check
---> Package policycoreutils-python.x86_64 0:2.0.83-19.39.el6 will be installed
--> Processing Dependency: libsemanage-python >= 2.0.43-4 for package: policycoreutils-python-2.0.83-19.39.el6.x86_64
--> Processing Dependency: audit-libs-python >= 1.4.2-1 for package: policycoreutils-python-2.0.83-19.39.el6.x86_64
--> Processing Dependency: setools-libs-python for package: policycoreutils-python-2.0.83-19.39.el6.x86_64
--> Running transaction check
---> Package audit-libs-python.x86_64 0:2.2-4.el6_5 will be installed
--> Processing Dependency: audit-libs = 2.2-4.el6_5 for package: audit-libs-python-2.2-4.el6_5.x86_64
---> Package libsemanage-python.x86_64 0:2.0.43-4.2.el6 will be installed
---> Package setools-libs-python.x86_64 0:3.3.7-4.el6 will be installed
--> Processing Dependency: setools-libs = 3.3.7-4.el6 for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libsefs.so.4(VERS_4.0)(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libseaudit.so.4(VERS_4.2)(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libseaudit.so.4(VERS_4.1)(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libqpol.so.1(VERS_1.4)(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libqpol.so.1(VERS_1.3)(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libqpol.so.1(VERS_1.2)(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libpoldiff.so.1(VERS_1.3)(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libpoldiff.so.1(VERS_1.2)(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libapol.so.4(VERS_4.1)(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libapol.so.4(VERS_4.0)(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libsefs.so.4()(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libseaudit.so.4()(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libqpol.so.1()(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libpoldiff.so.1()(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Processing Dependency: libapol.so.4()(64bit) for package: setools-libs-python-3.3.7-4.el6.x86_64
--> Running transaction check
---> Package audit-libs.x86_64 0:2.2-2.el6 will be updated
--> Processing Dependency: audit-libs = 2.2-2.el6 for package: audit-2.2-2.el6.x86_64
---> Package audit-libs.x86_64 0:2.2-4.el6_5 will be an update
---> Package setools-libs.x86_64 0:3.3.7-4.el6 will be installed
--> Running transaction check
---> Package audit.x86_64 0:2.2-2.el6 will be updated
---> Package audit.x86_64 0:2.2-4.el6_5 will be an update
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package                  Arch     Version                      Repository
                                                                           Size
================================================================================
Installing:
 mysql55-mysql-server     x86_64   5.5.37-1.2.el6.centos.alt    scl        10 M
Installing for dependencies:
 audit-libs-python        x86_64   2.2-4.el6_5                  updates    59 k
 libsemanage-python       x86_64   2.0.43-4.2.el6               base       81 k
 mysql55-mysql            x86_64   5.5.37-1.2.el6.centos.alt    scl       5.7 M
 mysql55-mysql-libs       x86_64   5.5.37-1.2.el6.centos.alt    scl       217 k
 mysql55-runtime          x86_64   1-14.el6.centos.alt          scl       1.0 M
 perl-DBD-MySQL           x86_64   4.013-3.el6                  base      134 k
 policycoreutils-python   x86_64   2.0.83-19.39.el6             base      343 k
 setools-libs             x86_64   3.3.7-4.el6                  base      400 k
 setools-libs-python      x86_64   3.3.7-4.el6                  base      222 k
Updating for dependencies:
 audit                    x86_64   2.2-4.el6_5                  updates   225 k
 audit-libs               x86_64   2.2-4.el6_5                  updates    60 k

Transaction Summary
================================================================================
Install      10 Package(s)
Upgrade       2 Package(s)

Total download size: 19 M
Downloading Packages:
(1/12): audit-2.2-4.el6_5.x86_64.rpm                     | 225 kB     00:00    
(2/12): audit-libs-2.2-4.el6_5.x86_64.rpm                |  60 kB     00:00    
(3/12): audit-libs-python-2.2-4.el6_5.x86_64.rpm         |  59 kB     00:00    
(4/12): libsemanage-python-2.0.43-4.2.el6.x86_64.rpm     |  81 kB     00:00    
(5/12): mysql55-mysql-5.5.37-1.2.el6.centos.alt.x86_64.r | 5.7 MB     00:13    
(6/12): mysql55-mysql-libs-5.5.37-1.2.el6.centos.alt.x86 | 217 kB     00:01    
(7/12): mysql55-mysql-server-5.5.37-1.2.el6.centos.alt.x |  10 MB     00:17    
(8/12): mysql55-runtime-1-14.el6.centos.alt.x86_64.rpm   | 1.0 MB     00:01    
(9/12): perl-DBD-MySQL-4.013-3.el6.x86_64.rpm            | 134 kB     00:00    
(10/12): policycoreutils-python-2.0.83-19.39.el6.x86_64. | 343 kB     00:00    
(11/12): setools-libs-3.3.7-4.el6.x86_64.rpm             | 400 kB     00:00    
(12/12): setools-libs-python-3.3.7-4.el6.x86_64.rpm      | 222 kB     00:00    
--------------------------------------------------------------------------------
Total                                           448 kB/s |  19 MB     00:42    
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Warning: RPMDB altered outside of yum.
  Updating   : audit-libs-2.2-4.el6_5.x86_64                               1/14
  Installing : audit-libs-python-2.2-4.el6_5.x86_64                        2/14
  Installing : setools-libs-3.3.7-4.el6.x86_64                             3/14
  Installing : setools-libs-python-3.3.7-4.el6.x86_64                      4/14
  Installing : perl-DBD-MySQL-4.013-3.el6.x86_64                           5/14
  Installing : libsemanage-python-2.0.43-4.2.el6.x86_64                    6/14
  Installing : policycoreutils-python-2.0.83-19.39.el6.x86_64              7/14
  Installing : mysql55-runtime-1-14.el6.centos.alt.x86_64                  8/14
  Installing : mysql55-mysql-libs-5.5.37-1.2.el6.centos.alt.x86_64         9/14
  Installing : mysql55-mysql-5.5.37-1.2.el6.centos.alt.x86_64             10/14
  Installing : mysql55-mysql-server-5.5.37-1.2.el6.centos.alt.x86_64      11/14
  Updating   : audit-2.2-4.el6_5.x86_64                                   12/14
  Cleanup    : audit-2.2-2.el6.x86_64                                     13/14
  Cleanup    : audit-libs-2.2-2.el6.x86_64                                14/14
  Verifying  : libsemanage-python-2.0.43-4.2.el6.x86_64                    1/14
  Verifying  : mysql55-runtime-1-14.el6.centos.alt.x86_64                  2/14
  Verifying  : perl-DBD-MySQL-4.013-3.el6.x86_64                           3/14
  Verifying  : audit-libs-python-2.2-4.el6_5.x86_64                        4/14
  Verifying  : setools-libs-python-3.3.7-4.el6.x86_64                      5/14
  Verifying  : mysql55-mysql-5.5.37-1.2.el6.centos.alt.x86_64              6/14
  Verifying  : audit-libs-2.2-4.el6_5.x86_64                               7/14
  Verifying  : policycoreutils-python-2.0.83-19.39.el6.x86_64              8/14
  Verifying  : mysql55-mysql-server-5.5.37-1.2.el6.centos.alt.x86_64       9/14
  Verifying  : audit-2.2-4.el6_5.x86_64                                   10/14
  Verifying  : setools-libs-3.3.7-4.el6.x86_64                            11/14
  Verifying  : mysql55-mysql-libs-5.5.37-1.2.el6.centos.alt.x86_64        12/14
  Verifying  : audit-libs-2.2-2.el6.x86_64                                13/14
  Verifying  : audit-2.2-2.el6.x86_64                                     14/14

Installed:
  mysql55-mysql-server.x86_64 0:5.5.37-1.2.el6.centos.alt                      

Dependency Installed:
  audit-libs-python.x86_64 0:2.2-4.el6_5                                       
  libsemanage-python.x86_64 0:2.0.43-4.2.el6                                   
  mysql55-mysql.x86_64 0:5.5.37-1.2.el6.centos.alt                             
  mysql55-mysql-libs.x86_64 0:5.5.37-1.2.el6.centos.alt                        
  mysql55-runtime.x86_64 0:1-14.el6.centos.alt                                 
  perl-DBD-MySQL.x86_64 0:4.013-3.el6                                          
  policycoreutils-python.x86_64 0:2.0.83-19.39.el6                             
  setools-libs.x86_64 0:3.3.7-4.el6                                            
  setools-libs-python.x86_64 0:3.3.7-4.el6                                     

Dependency Updated:
  audit.x86_64 0:2.2-4.el6_5           audit-libs.x86_64 0:2.2-4.el6_5         

Complete!

インストールが終わったので、MySQLを起動する。

# /etc/init.d/mysql55-mysqld start
MySQL データベースを初期化中:  WARNING: The host 'centos6' could not be looked up with resolveip.
This probably means that your libc libraries are not 100 % compatible
with this binary MySQL version. The MySQL daemon, mysqld, should work
normally with the exception that host name resolving will not work.
This means that you should use IP addresses instead of hostnames
when specifying MySQL privileges !
Installing MySQL system tables...
OK
Filling help tables...
OK

To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system

PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:

/opt/rh/mysql55/root/usr/bin/mysqladmin -u root password 'new-password'
/opt/rh/mysql55/root/usr/bin/mysqladmin -u root -h centos6 password 'new-password'

Alternatively you can run:
/opt/rh/mysql55/root/usr/bin/mysql_secure_installation

which will also give you the option of removing the test
databases and anonymous user created by default.  This is
strongly recommended for production servers.

See the manual for more instructions.

You can start the MySQL daemon with:
cd /opt/rh/mysql55/root/usr ; /opt/rh/mysql55/root/usr/bin/mysqld_safe &

You can test the MySQL daemon with mysql-test-run.pl
cd /opt/rh/mysql55/root/usr/mysql-test ; perl mysql-test-run.pl

Please report any problems at http://bugs.mysql.com/

                                                           [  OK  ]
mysql55-mysqld を起動中:                                   [  OK  ]

その後、トラブル発生。

★MySQL5が起動しない問題の対応。

 リブート後にMySQL5が起動しなかった時のトラブルシュート。

$ mysql -u root
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

このエラーが出た場合は、いろいろの可能性が考えられる。
原因を探ると、MySQLが起動していない可能性が。
$ chkconfig --list | grep mysql
mysql55-mysqld     0:off    1:off    2:off    3:off    4:off    5:off    6:off

あかん…… ほんとうに動いてないぞっと。

# chkconfig mysqld on
サービス mysql に関する情報の読み込み中にエラーが発生しました: そのようなファイルやディレクトリはありません

ん????なんで???
ノーマルのMySQLとはちょっと違うのかな??

# chkconfig mysql55-mysqld on
# chkconfig --list | grep mysql
mysql55-mysqld     0:off    1:off    2:on    3:on    4:on    5:on    6:off

今度は大丈夫そう。リブートして確認してみる。
大丈夫、ちゃんと動いてる。

続いて、Mroongaをインストールする。

# yum install -y mysql55-mroonga
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
 * base: www.ftp.ne.jp
 * extras: www.ftp.ne.jp
 * updates: www.ftp.ne.jp
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package mysql55-mroonga.x86_64 0:4.03-2.el6 will be installed
--> Processing Dependency: groonga-libs >= 4.0.0 for package: mysql55-mroonga-4.03-2.el6.x86_64
--> Processing Dependency: groonga-normalizer-mysql for package: mysql55-mroonga-4.03-2.el6.x86_64
--> Processing Dependency: libgroonga.so.0()(64bit) for package: mysql55-mroonga-4.03-2.el6.x86_64
--> Running transaction check
---> Package groonga-libs.x86_64 0:4.0.3-1.el6 will be installed
---> Package groonga-normalizer-mysql.x86_64 0:1.0.6-1.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package                       Arch        Version           Repository    Size
================================================================================
Installing:
 mysql55-mroonga               x86_64      4.03-2.el6        groonga      173 k
Installing for dependencies:
 groonga-libs                  x86_64      4.0.3-1.el6       groonga      1.0 M
 groonga-normalizer-mysql      x86_64      1.0.6-1.el6       groonga       63 k

Transaction Summary
================================================================================
Install       3 Package(s)

Total download size: 1.2 M
Installed size: 3.9 M
Downloading Packages:
(1/3): groonga-libs-4.0.3-1.el6.x86_64.rpm               | 1.0 MB     00:01    
(2/3): groonga-normalizer-mysql-1.0.6-1.el6.x86_64.rpm   |  63 kB     00:00    
(3/3): mysql55-mroonga-4.03-2.el6.x86_64.rpm             | 173 kB     00:00    
--------------------------------------------------------------------------------
Total                                           790 kB/s | 1.2 MB     00:01    
警告: rpmts_HdrFromFdno: ヘッダ V4 DSA/SHA1 Signature, key ID 45499429: NOKEY
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-groonga
Importing GPG key 0x45499429:
 Userid : groonga Key (groonga Official Signing Key)
 Package: groonga-release-1.1.0-1.noarch (installed)
 From   : /etc/pki/rpm-gpg/RPM-GPG-KEY-groonga
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : groonga-libs-4.0.3-1.el6.x86_64                              1/3
  Installing : groonga-normalizer-mysql-1.0.6-1.el6.x86_64                  2/3
  Installing : mysql55-mroonga-4.03-2.el6.x86_64                            3/3
/opt/rh/mysql55/root/usr/bin/mysql -u root < /opt/rh/mysql55/root/usr/share/mroonga/install.sql
  Verifying  : groonga-normalizer-mysql-1.0.6-1.el6.x86_64                  1/3
  Verifying  : groonga-libs-4.0.3-1.el6.x86_64                              2/3
  Verifying  : mysql55-mroonga-4.03-2.el6.x86_64                            3/3

Installed:
  mysql55-mroonga.x86_64 0:4.03-2.el6                                          

Dependency Installed:
  groonga-libs.x86_64 0:4.0.3-1.el6                                            
  groonga-normalizer-mysql.x86_64 0:1.0.6-1.el6                                

Complete!

トークナイザーにMeCabを使うので、インストールしておく。

# yum install -y groonga-tokenizer-mecab
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
 * base: www.ftp.ne.jp
 * extras: www.ftp.ne.jp
 * updates: www.ftp.ne.jp
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package groonga-tokenizer-mecab.x86_64 0:4.0.3-1.el6 will be installed
--> Processing Dependency: mecab-dic for package: groonga-tokenizer-mecab-4.0.3-1.el6.x86_64
--> Processing Dependency: libmecab.so.2()(64bit) for package: groonga-tokenizer-mecab-4.0.3-1.el6.x86_64
--> Running transaction check
---> Package mecab.x86_64 0:0.996-1.el6 will be installed
---> Package mecab-ipadic.x86_64 0:2.7.0.20070801-8.el6.1 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package                   Arch     Version                     Repository
                                                                           Size
================================================================================
Installing:
 groonga-tokenizer-mecab   x86_64   4.0.3-1.el6                 groonga    12 k
Installing for dependencies:
 mecab                     x86_64   0.996-1.el6                 groonga   2.3 M
 mecab-ipadic              x86_64   2.7.0.20070801-8.el6.1      groonga    13 M

Transaction Summary
================================================================================
Install       3 Package(s)

Total download size: 15 M
Installed size: 63 M
Downloading Packages:
(1/3): groonga-tokenizer-mecab-4.0.3-1.el6.x86_64.rpm    |  12 kB     00:00    
(2/3): mecab-0.996-1.el6.x86_64.rpm                      | 2.3 MB     00:02    
(3/3): mecab-ipadic-2.7.0.20070801-8.el6.1.x86_64.rpm    |  13 MB     00:14    
--------------------------------------------------------------------------------
Total                                           698 kB/s |  15 MB     00:22    
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : mecab-0.996-1.el6.x86_64                                     1/3
  Installing : mecab-ipadic-2.7.0.20070801-8.el6.1.x86_64                   2/3
  Installing : groonga-tokenizer-mecab-4.0.3-1.el6.x86_64                   3/3
  Verifying  : mecab-0.996-1.el6.x86_64                                     1/3
  Verifying  : mecab-ipadic-2.7.0.20070801-8.el6.1.x86_64                   2/3
  Verifying  : groonga-tokenizer-mecab-4.0.3-1.el6.x86_64                   3/3

Installed:
  groonga-tokenizer-mecab.x86_64 0:4.0.3-1.el6                                 

Dependency Installed:
  mecab.x86_64 0:0.996-1.el6    mecab-ipadic.x86_64 0:2.7.0.20070801-8.el6.1  

Complete!

途中にいろいろトラブルはあったけれど、とにかく、なんとかインストールは終わったようだ。
MySQL5のrootパスワードは変えておかねば。

$ mysql -u root
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.5.37 MySQL Community Server (GPL)

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> SET PASSWORD for root@localhost=PASSWORD('hogehoge');
Query OK, 0 rows affected (0.00 sec)

やっとここまで戻って来れた。
3歩進んで10歩下がった感じか。。。

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