前提・実現したいこと

EC2(CentOS)インスタンスにphpMyAdminをインストールし、RDSのデータベースを閲覧できるようにしたい。

発生している問題・エラーメッセージ

rootユーザーでログインしようとすると以下のように返される。パスワードに誤りはない。

該当のソースコード

ディレクトリ構成
`-- phpmyadmin
    |-- CODE_OF_CONDUCT.md
    |-- CONTRIBUTING.md
    |-- ChangeLog
    |-- DCO
    |-- LICENSE
    |-- README
    |-- RELEASE-DATE-4.8.5
    |-- ajax.php
    |-- browse_foreigners.php
    |-- changelog.php
    |-- chk_rel.php
    |-- composer.json
    |-- composer.lock
    |-- config.sample.inc.php
    |-- db_central_columns.php
    |-- db_datadict.php
    |-- db_designer.php
    |-- db_events.php
    |-- db_export.php
    |-- db_import.php
    |-- db_multi_table_query.php
    |-- db_operations.php
    |-- db_qbe.php
    |-- db_routines.php
    |-- db_search.php
    |-- db_sql.php
    |-- db_sql_autocomplete.php
    |-- db_sql_format.php
    |-- db_structure.php
    |-- db_tracking.php
    |-- db_triggers.php
    |-- doc
    |-- error_report.php
    |-- examples
    |-- export.php
    |-- favicon.ico
    |-- gis_data_editor.php
    |-- import.php
    |-- import_status.php
    |-- index.php
    |-- js
    |-- libraries
    |-- license.php
    |-- lint.php
    |-- locale
    |-- logout.php
    |-- navigation.php
    |-- normalization.php
    |-- package.json
    |-- phpcs.xml.dist
    |-- phpinfo.php
    |-- phpmyadmin.css.php
    |-- prefs_forms.php
    |-- prefs_manage.php
    |-- prefs_twofactor.php
    |-- print.css
    |-- robots.txt
    |-- schema_export.php
    |-- server_binlog.php
    |-- server_collations.php
    |-- server_databases.php
    |-- server_engines.php
    |-- server_export.php
    |-- server_import.php
    |-- server_plugins.php
    |-- server_privileges.php
    |-- server_replication.php
    |-- server_sql.php
    |-- server_status.php
    |-- server_status_advisor.php
    |-- server_status_monitor.php
    |-- server_status_processes.php
    |-- server_status_queries.php
    |-- server_status_variables.php
    |-- server_user_groups.php
    |-- server_variables.php
    |-- setup
    |-- show_config_errors.php
    |-- sql
    |-- sql.php
    |-- tbl_addfield.php
    |-- tbl_change.php
    |-- tbl_chart.php
    |-- tbl_create.php
    |-- tbl_export.php
    |-- tbl_find_replace.php
    |-- tbl_get_field.php
    |-- tbl_gis_visualization.php
    |-- tbl_import.php
    |-- tbl_indexes.php
    |-- tbl_operations.php
    |-- tbl_recent_favorite.php
    |-- tbl_relation.php
    |-- tbl_replace.php
    |-- tbl_row_action.php
    |-- tbl_select.php
    |-- tbl_sql.php
    |-- tbl_structure.php
    |-- tbl_tracking.php
    |-- tbl_triggers.php
    |-- tbl_zoom_select.php
    |-- templates
    |-- themes
    |-- themes.php
    |-- tmp
    |-- transformation_overview.php
    |-- transformation_wrapper.php
    |-- url.php
    |-- user_password.php
    |-- vendor
    |-- version_check.php
    |-- view_create.php
    |-- view_operations.php
    `-- yarn.lock

phpmyadmin/config.sample.inc.php

php
1<?php
2/* vim: set expandtab sw=4 ts=4 sts=4: */
3/**
4 * phpMyAdmin sample configuration, you can use it as base for
5 * manual configuration. For easier setup you can use setup/
6 *
7 * All directives are explained in documentation in the doc/ folder
8 * or at <https://docs.phpmyadmin.net/>.
9 *
10 * @package PhpMyAdmin
11 */
12
13/**
14 * This is needed for cookie based authentication to encrypt password in
15 * cookie. Needs to be 32 chars long.
16 */
17$cfg['blowfish_secret'] = ''; /* YOU MUST FILL IN THIS FOR COOKIE AUTH! */
18
19/**
20 * Servers configuration
21 */
22$i = 0;
23
24/**
25 * First server
26 */
27$i++;
28/* Authentication type */
29$cfg['Servers'][$i]['auth_type'] = 'cookie';
30/* Server parameters */
31$cfg['Servers'][$i]['host'] = 'RDSエンドポイント';
32$cfg['Servers'][$i]['compress'] = false;
33$cfg['Servers'][$i]['AllowNoPassword'] = false;
34
35/**
36 * phpMyAdmin configuration storage settings.
37 */
38
39/* User used to manipulate with storage */
40// $cfg['Servers'][$i]['controlhost'] = '';
41// $cfg['Servers'][$i]['controlport'] = '';
42// $cfg['Servers'][$i]['controluser'] = 'pma';
43// $cfg['Servers'][$i]['controlpass'] = 'pmapass';
44
45/* Storage database and tables */
46// $cfg['Servers'][$i]['pmadb'] = 'phpmyadmin';
47// $cfg['Servers'][$i]['bookmarktable'] = 'pma__bookmark';
48// $cfg['Servers'][$i]['relation'] = 'pma__relation';
49// $cfg['Servers'][$i]['table_info'] = 'pma__table_info';
50// $cfg['Servers'][$i]['table_coords'] = 'pma__table_coords';
51// $cfg['Servers'][$i]['pdf_pages'] = 'pma__pdf_pages';
52// $cfg['Servers'][$i]['column_info'] = 'pma__column_info';
53// $cfg['Servers'][$i]['history'] = 'pma__history';
54// $cfg['Servers'][$i]['table_uiprefs'] = 'pma__table_uiprefs';
55// $cfg['Servers'][$i]['tracking'] = 'pma__tracking';
56// $cfg['Servers'][$i]['userconfig'] = 'pma__userconfig';
57// $cfg['Servers'][$i]['recent'] = 'pma__recent';
58// $cfg['Servers'][$i]['favorite'] = 'pma__favorite';
59// $cfg['Servers'][$i]['users'] = 'pma__users';
60// $cfg['Servers'][$i]['usergroups'] = 'pma__usergroups';
61// $cfg['Servers'][$i]['navigationhiding'] = 'pma__navigationhiding';
62// $cfg['Servers'][$i]['savedsearches'] = 'pma__savedsearches';
63// $cfg['Servers'][$i]['central_columns'] = 'pma__central_columns';
64// $cfg['Servers'][$i]['designer_settings'] = 'pma__designer_settings';
65// $cfg['Servers'][$i]['export_templates'] = 'pma__export_templates';
66
67/**
68 * End of servers configuration
69 */
70
71/**
72 * Directories for saving/loading files from server
73 */
74$cfg['UploadDir'] = '';
75$cfg['SaveDir'] = '';
76
77/**
78 * Whether to display icons or text or both icons and text in table row
79 * action segment. Value can be either of 'icons', 'text' or 'both'.
80 * default = 'both'
81 */
82//$cfg['RowActionType'] = 'icons';
83
84/**
85 * Defines whether a user should be displayed a "show all (records)"
86 * button in browse mode or not.
87 * default = false
88 */
89//$cfg['ShowAll'] = true;
90
91/**
92 * Number of rows displayed when browsing a result set. If the result
93 * set contains more rows, "Previous" and "Next".
94 * Possible values: 25, 50, 100, 250, 500
95 * default = 25
96 */
97//$cfg['MaxRows'] = 50;
98
99/**
100 * Disallow editing of binary fields
101 * valid values are:
102 *   false    allow editing
103 *   'blob'   allow editing except for BLOB fields
104 *   'noblob' disallow editing except for BLOB fields
105 *   'all'    disallow editing
106 * default = 'blob'
107 */
108//$cfg['ProtectBinary'] = false;
109
110/**
111 * Default language to use, if not browser-defined or user-defined
112 * (you find all languages in the locale folder)
113 * uncomment the desired line:
114 * default = 'en'
115 */
116//$cfg['DefaultLang'] = 'en';
117//$cfg['DefaultLang'] = 'de';
118
119/**
120 * How many columns should be used for table display of a database?
121 * (a value larger than 1 results in some information being hidden)
122 * default = 1
123 */
124//$cfg['PropertiesNumColumns'] = 2;
125
126/**
127 * Set to true if you want DB-based query history.If false, this utilizes
128 * JS-routines to display query history (lost by window close)
129 *
130 * This requires configuration storage enabled, see above.
131 * default = false
132 */
133//$cfg['QueryHistoryDB'] = true;
134
135/**
136 * When using DB-based query history, how many entries should be kept?
137 * default = 25
138 */
139//$cfg['QueryHistoryMax'] = 100;
140
141/**
142 * Whether or not to query the user before sending the error report to
143 * the phpMyAdmin team when a JavaScript error occurs
144 *
145 * Available options
146 * ('ask' | 'always' | 'never')
147 * default = 'ask'
148 */
149//$cfg['SendErrorReports'] = 'always';
150
151/**
152 * You can find more configuration options in the documentation
153 * in the doc/ folder or at <https://docs.phpmyadmin.net/>.
154 */

自分で調べたことや試したこと

phpMyAdmin/config.inc.phpを変更するようにググると出てくるのですがそのようなファイルが見当たらず、内容的にそれっぽいphpmyadmin/config.sample.inc.phpを編集している。
$cfg['Servers'][$i]['host'] = 'localhost'をRDSエンドポイントに変更した。