我有一个docker映像，其中有一个由一个主设备和两个从设备组成的hadoop集群。在这个群集上，我有HBase。
我正在尝试使用scoop将安装在本地计算机上的postgres数据库迁移到Docker映像上的HBase数据库。
对于postgres，这是我的postgresql.conf配置文件：
#------------------------------------------------------------------------------
# CONNECTIONS AND AUTHENTICATION
#------------------------------------------------------------------------------
# - Connection Settings -
listen_addresses = '*' # what IP address(es) to listen on;
# 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
# - Security and Authentication -
#authentication_timeout = 1min # 1s-600s ssl = on
#ssl_ciphers = 'HIGH:MEDIUM:+3DES:!aNULL' # allowed SSL ciphers
#ssl_prefer_server_ciphers = on
#ssl_ecdh_curve = 'prime256v1'
#ssl_dh_params_file = '' ssl_cert_file = '/etc/ssl/certs/ssl-cert-snakeoil.pem' ssl_key_file =
'/etc/ssl/private/ssl-cert-snakeoil.key'
#ssl_ca_file = ''
#ssl_crl_file = ''
#password_encryption = md5 # md5 or scram-sha-256
#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
这也是pg_hba.conf文件的内容：
# Database administrative login by Unix domain socket local all postgres peer
# 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 all trust
host replication all 127.0.0.1/32 trust
host replication all ::1/128
我的问题是，当我尝试使用以下命令使用独家新闻从Docker映像连接到Postgres时：
sqoop import --connect jdbc:postgresql://localhost:5432/mimic --username postgres --password 0000 --table admission_ids --hbase-table mimic --column-family admission_ids --hbase-row-key id -m 1
我只是有这个问题：
Check that the hostname and port are correct and that the postmaster
is accepting TCP/IP connections. org.postgresql.util.PSQLException:
Connection refused. Check that the hostname and port are correct and
that the postmaster is accepting TCP/IP connections.
搜索后，我了解到docker是此问题的根源，并确认这一点，我只是第一次尝试使用本地计算机上的tenlnet连接到postgres，这是结果：
telnet localhost 5432
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
第二次从docker上
telnet localhost 5432
Trying 127.0.0.1...
Trying ::1...
telnet: Unable to connect to remote host: Cannot assign requested address
我的docker映像名为spark-hadoop。
我试图截断此命令，但始终无法正常工作
docker run -d --name bridgeToHadoop --publish=127.0.0.1:5432:5432 -p 172.18.0.2:5432:5432 spark-hadoop
答案 0 :(得分：0)
在主机上运行的Postgresql，您正尝试从Docker容器连接它。执行此操作时，主机不应在连接字符串中为{
"_id" : "7XXXXXXXXXX",
"apps" : [
{
"id" : "e0d538e0df9a345e",
"os" : "android",
"token" : "f1zp-VSi7Ec:APA91bEAbfH8nMeVidkIjPrJ28WHRFDy-BhvKCQdDSdCYsylUzET9GjbPHjofCrr1NMQurinMCI4fuiF7VWNPXne-80op_h0MloK217kc1zKptdo9FTgAH5R932uDphcyB1xQ27-AFdR",
"version" : "3.2.1",
"build" : "8115680e",
"timestamp" : NumberLong(1571740696818)
}
]
}
。本地主机是指Docker容器。
用IP地址替换本地主机，应该紧随其后
localhost