postgresql - DBConnection.ConnectionError)tcp 连接(本地主机 :5432): connection refused - :econnrefused

Question

我正在 Buddy 上运行构建持续集成服务器，它在执行 mix test 时出现错误，当它到达 postgrex/ecto 部分时:

    ==> postgrex
Compiling 61 files (.ex)
Compiling lib/postgrex/protocol.ex (it's taking more than 10s)
Compiling lib/postgrex/default_types.ex (it's taking more than 10s)
Generated postgrex app
==> ecto
Compiling 69 files (.ex)
Compiling lib/ecto/query/builder/lock.ex (it's taking more than 10s)
Compiling lib/ecto/repo/queryable.ex (it's taking more than 10s)
Compiling lib/ecto/query/inspect.ex (it's taking more than 10s)
Compiling lib/mix/tasks/ecto.drop.ex (it's taking more than 10s)
Compiling lib/ecto/query/builder/filter.ex (it's taking more than 10s)
Compiling lib/ecto/repo/preloader.ex (it's taking more than 10s)
Compiling lib/mix/tasks/ecto.gen.repo.ex (it's taking more than 10s)
Compiling lib/ecto/adapters/mysql.ex (it's taking more than 10s)
Compiling lib/ecto/schema.ex (it's taking more than 10s)
Compiling lib/ecto/migration/runner.ex (it's taking more than 10s)
Compiling lib/ecto/repo/schema.ex (it's taking more than 10s)
Compiling lib/ecto/embedded.ex (it's taking more than 10s)
Compiling lib/ecto/migration/schema_migration.ex (it's taking more than 10s)
Compiling lib/ecto/query/builder/preload.ex (it's taking more than 10s)
Compiling lib/ecto/query/builder/order_by.ex (it's taking more than 10s)
Compiling lib/ecto/uuid.ex (it's taking more than 10s)
Compiling lib/ecto/type.ex (it's taking more than 10s)
Compiling lib/ecto/association.ex (it's taking more than 10s)
Compiling lib/ecto/adapters/postgres/connection.ex (it's taking more than 10s)
Compiling lib/mix/tasks/ecto.gen.migration.ex (it's taking more than 10s)
Compiling lib/ecto/query/builder/join.ex (it's taking more than 10s)
Compiling lib/ecto/query/planner.ex (it's taking more than 10s)
Compiling lib/ecto/log_entry.ex (it's taking more than 10s)
Compiling lib/ecto/query/builder/select.ex (it's taking more than 10s)
Compiling lib/ecto/query/builder/distinct.ex (it's taking more than 10s)
Compiling lib/ecto/query/builder/limit_offset.ex (it's taking more than 10s)
Compiling lib/ecto/changeset.ex (it's taking more than 10s)
Compiling lib/ecto/query/builder/group_by.ex (it's taking more than 10s)
Compiling lib/ecto/changeset/relation.ex (it's taking more than 10s)
Compiling lib/ecto/multi.ex (it's taking more than 10s)
Compiling lib/ecto.ex (it's taking more than 10s)
Compiling lib/ecto/query/builder.ex (it's taking more than 10s)
Compiling lib/ecto/adapters/postgres.ex (it's taking more than 10s)
Generated ecto app
==> phoenix_ecto
Compiling 4 files (.ex)
Generated phoenix_ecto app
==> phoenix_chat
Compiling 19 files (.ex)
Generated phoenix_chat app
08:49:48.868 [error] GenServer #PID<0.3296.0> terminating
** (DBConnection.ConnectionError) tcp connect (localhost:5432): connection refused - :econnrefused
    (db_connection) lib/db_connection/connection.ex:148: DBConnection.Connection.connect/2
    (connection) lib/connection.ex:622: Connection.enter_connect/5
    (stdlib) proc_lib.erl:247: :proc_lib.init_p_do_apply/3
** (Mix) The database for PhoenixChat.Repo couldn't be created: an exception was raised:
    ** (DBConnection.ConnectionError) tcp connect (localhost:5432): connection refused - :econnrefused
        (db_connection) lib/db_connection/connection.ex:148: DBConnection.Connection.connect/2
        (connection) lib/connection.ex:622: Connection.enter_connect/5
        (stdlib) proc_lib.erl:247: :proc_lib.init_p_do_apply/3
Build failed !!!.

我认为这是因为构建服务器似乎是 (localhost:5432) 并且我认为它与通常位于端口 4000 上的 Phoenix 配合不佳。See this answer for my coming to that conclusion.

解决这个问题的方法是什么？

我更改了 dev.ex 以具有此配置:

config :phoenix_chat, PhoenixChat.Endpoint,
  http: [port: {:system, "PORT"}],

然后我将任务设置为 PORT=4000 mix test 但我仍然遇到相同的错误。

编辑:我的端口设置似乎没有起作用，因为错误仍然是:

PORT=4000 mix test
09:18:34.884 [error] GenServer #PID<0.183.0> terminating
** (DBConnection.ConnectionError) tcp connect (localhost:5432): connection refused - :econnrefused
    (db_connection) lib/db_connection/connection.ex:148: DBConnection.Connection.connect/2
    (connection) lib/connection.ex:622: Connection.enter_connect/5
    (stdlib) proc_lib.erl:247: :proc_lib.init_p_do_apply/3
** (Mix) The database for PhoenixChat.Repo couldn't be created: an exception was raised:
    ** (DBConnection.ConnectionError) tcp connect (localhost:5432): connection refused - :econnrefused
        (db_connection) lib/db_connection/connection.ex:148: DBConnection.Connection.connect/2
        (connection) lib/connection.ex:622: Connection.enter_connect/5
        (stdlib) proc_lib.erl:247: :proc_lib.init_p_do_apply/3
Build failed !!!.

所以我现在认为解决方案可能是this .我不太了解如何添加 ssh key 。

Answer 1

我的笔记本电脑崩溃了，在 /usr/local/var/postgres 中留下了一个 postmaster.pid 文件。

删除后，我的 postgres 又开始正常工作了。

如果你想检查 Postgres 是否正常运行，你可以运行 pg_isready 来获取输出。您应该得到:/tmp:5432 - accepting connections - 您的端口可能因您的配置而异。

玩得开心!