node.js - Postgres、Docker 和 Node.js - 密码验证失败(连接被拒绝或 psql : FATAL: role "root" does not exist)

Question

我只是不明白为什么我不能使用 Node.js 登录 Postgres

user: postgres
password: postgres
host: 192.168.99.100
port: 5432
database: test_db

下面是Node.js中导致错误的几行代码

错误:用户“postgres”的密码验证失败

var pg = require('pg');
var conString = 
"postgres://postgres:postgres@192.168.99.100:5432/test_db";

var client = new pg.Client(conString);
client.connect();

我从 Docker 容器运行 Postgres。

我启动了另一个容器并可以使用以下命令成功访问数据库

psql -U postgres -d test_db -h 192.168.99.100 -W

此外，我可以使用 pgAdmin 4 成功登录

pg_hba.conf

 # TYPE  DATABASE        USER            ADDRESS                 METHOD

 # "local" is for Unix domain socket connections only
 local   all             all                                     trust
 # IPv4 local connections:
 host    all             all             127.0.0.1/32            trust
 # IPv6 local connections:
 host    all             all             ::1/128                 trust
 # Allow replication connections from localhost, by a user with the
 # replication privilege.
 #local   replication     postgres                                trust
 #host    replication     postgres        127.0.0.1/32            trust
 #host    replication     postgres        ::1/128                 trust

 host all all all md5

postgresql.conf

 #------------------------------------------------------------------------------
 # CONNECTIONS AND AUTHENTICATION
 #------------------------------------------------------------------------------

 # - Connection Settings -

 listen_addresses = '*'                  # comma-separated list of addresses;
                                         # defaults to 'localhost'; use '*' for all
                                         # (change requires restart)
 #port = 5432                            # (change requires restart)
 max_connections = 100                   # (change requires restart)
 #superuser_reserved_connections = 3     # (change requires restart)
 #unix_socket_directories = '/var/run/postgresql'        # comma-separated list of directories
                                         # (change requires restart)
 #unix_socket_group = ''                 # (change requires restart)
 #unix_socket_permissions = 0777         # begin with 0 to use octal notation
                                         # (change requires restart)
 #bonjour = off                          # advertise server via Bonjour
                                         # (change requires restart)
 #bonjour_name = ''                      # defaults to the computer name
                                         # (change requires restart)

 # - Security and Authentication -

 #authentication_timeout = 1min          # 1s-600s
 #ssl = off                              # (change requires restart)
 #ssl_ciphers = 'HIGH:MEDIUM:+3DES:!aNULL' # allowed SSL ciphers
                                    # (change requires restart)
 #ssl_prefer_server_ciphers = on         # (change requires restart)
 #ssl_ecdh_curve = 'prime256v1'          # (change requires restart)
 #ssl_cert_file = 'server.crt'           # (change requires restart)
 #ssl_key_file = 'server.key'            # (change requires restart)
 #ssl_ca_file = ''                       # (change requires restart)
 #ssl_crl_file = ''                      # (change requires restart)
 #password_encryption = on
 #db_user_namespace = off
 #row_security = on

 # GSSAPI using Kerberos
 #krb_server_keyfile = ''
 #krb_caseins_users = off

 # - TCP Keepalives -
 # see "man 7 tcp" for details

 #tcp_keepalives_idle = 0                # TCP_KEEPIDLE, in seconds;
                                         # 0 selects the system default
 #tcp_keepalives_interval = 0            # TCP_KEEPINTVL, in seconds;
                                         # 0 selects the system default
 #tcp_keepalives_count = 0               # TCP_KEEPCNT;
                                         # 0 selects the system default

感谢任何帮助...

Answer 1

以上都没有帮助通过 Node.js 应用程序连接到数据库

经过几个小时的反复试验，我决定在我的 MAC 上安装一个 Postgres 实例。在安装 Postgres 时使用了操作系统的登录凭据(在本例中是我的 MAC 登录凭据)。我能够使用我的 Node.js 应用程序登录到 Postgres 数据库。

然后我想也许这就是导致连接问题的全部原因 - 操作系统用户名。标准 Postgres Docker 镜像以 root 作为标准用户名。切换到 root 后，我可以毫无问题地登录。

重现步骤如下:

1. 获取标准的 Postgres Docker 镜像

   docker pull postgres
   

2. 使用以下环境变量启动 Docker 容器:

   docker run --name pg -p 5432:5432 -e POSTGRES_PASSWORD=passwrd -e POSTGRES_USER=root -e POSTGRES_DB=dse -d postgres
   

3. 启动命令行界面并测试连接性。这使用 docker 主机的 IP。要获取 IP，请使用 docker-machine ip。密码是passwrd

   docker exec -ti pg /bin/bash
   
   psql -U root -d dse -h 192.168.99.100 -W
   Password for user root: 
   psql (9.6.2)
   Type "help" for help.
   
   dse=#
   

注意:这也将防止任何类似这样的错误:psql: FATAL: role "root"does not exist

1. 使用以下内容创建一个 Node.js 应用程序和一个名为 connect.js 的文件:

   var pg = require('pg');
   
   var conString = "postgres://root:passwrd@192.168.99.100/dse";
   var client = new pg.Client(conString);
   client.connect();
   console.log(client.connectionParameters);
   process.exit(1);
   

2. 运行应用

   node connect.js 
   

PS: pg_hba.conf、postgresql.conf 这两个文件我都没有编辑。

希望对遇到同样问题的人有所帮助。