[英]Connection refused: Is the server running on host “db” (172.21.0.2) and accepting web_1 TCP/IP connections on port 5432?
我知道這是一個典型的問題，但是我需要社區幫助來解決它。 當我運行 docker-compose 時，連接被拒絕：服務器是否在主機“db”（172.21.0.2）上運行並在端口 5432 上接受 web_1 TCP/IP 連接？ docker-compose 的 Web 部分失敗，但 db 運行。 我可以使用 localhost:5432 連接到數據庫。 這不是等待問題，因為 tiangolo/uvicorn-gunicorn:python3.8-alpine3.10 實現了等待機制 - dockerize。 有誰知道問題出在哪里？ 或者也許有人能指出我正確的方向？ 所以我的 Dockerfile 是
FROM tiangolo/uvicorn-gunicorn:python3.8-alpine3.10
# copy requirements file
COPY ./requirements.txt /usr/src/app/requirements.txt
# install dependencies
RUN set -eux \
&& apk add --no-cache --virtual .build-deps build-base \
libressl-dev libffi-dev gcc musl-dev python3-dev \
postgresql-dev openssl \
&& pip install --upgrade pip setuptools wheel \
&& pip install -r /usr/src/app/requirements.txt \
&& rm -rf /root/.cache/pip
# copy project
COPY . /app
我的 docker-compose 是：
version: '3.7'
services:
db:
image: postgres:13-alpine
volumes:
- postgres_data:/var/lib/postgresql/data/
ports:
- 5432:5432
environment:
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=postgres
- POSTGRES_DB=api
web:
build: ./src
ports:
- 80:80
depends_on:
- db
environment:
- DATABASE_URL=postgresql://postgres:postgres@db/api
volumes:
postgres_data:
我使用 dockerize 添加了一個等待，但是 web 部分失敗了：
Attaching to gunicorn_db_1, gunicorn_web_1
db_1 | The files belonging to this database system will be owned by user "postgres".
db_1 | This user must also own the server process.
db_1 |
db_1 | The database cluster will be initialized with locale "en_US.utf8".
db_1 | The default database encoding has accordingly been set to "UTF8".
db_1 | The default text search configuration will be set to "english".
db_1 |
db_1 | Data page checksums are disabled.
db_1 |
db_1 | fixing permissions on existing directory /var/lib/postgresql/data ... ok
db_1 | creating subdirectories ... ok
db_1 | selecting dynamic shared memory implementation ... posix
db_1 | selecting default max_connections ... 100
db_1 | selecting default shared_buffers ... 128MB
web_1 | 2020/08/30 15:33:51 Waiting for: tcp://db:5432
web_1 | 2020/08/30 15:33:51 Problem with dial: dial tcp 172.21.0.2:5432: connect: connection refused. Sleeping 30s
db_1 | selecting default time zone ... Etc/UTC
db_1 | creating configuration files ... ok
db_1 | running bootstrap script ... ok
db_1 | performing post-bootstrap initialization ... ok
db_1 | syncing data to disk ... initdb: warning: enabling "trust" authentication for local connections
db_1 | You can change this by editing pg_hba.conf or using the option -A, or
db_1 | --auth-local and --auth-host, the next time you run initdb.
db_1 | ok
db_1 |
db_1 |
db_1 | Success. You can now start the database server using:
db_1 |
db_1 | pg_ctl -D /var/lib/postgresql/data -l logfile start
db_1 |
db_1 | waiting for server to start....2020-08-30 15:33:53.037 UTC [45] LOG: starting PostgreSQL 13beta3 (Debian 13~beta3-1.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit
db_1 | 2020-08-30 15:33:53.044 UTC [45] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1 | 2020-08-30 15:33:53.059 UTC [46] LOG: database system was shut down at 2020-08-30 15:33:52 UTC
db_1 | 2020-08-30 15:33:53.066 UTC [45] LOG: database system is ready to accept connections
db_1 | done
db_1 | server started
db_1 | CREATE DATABASE
db_1 |
db_1 |
db_1 | /usr/local/bin/docker-entrypoint.sh: ignoring /docker-entrypoint-initdb.d/*
db_1 |
db_1 | 2020-08-30 15:33:53.399 UTC [45] LOG: received fast shutdown request
db_1 | waiting for server to shut down....2020-08-30 15:33:53.404 UTC [45] LOG: aborting any active transactions
db_1 | 2020-08-30 15:33:53.407 UTC [45] LOG: background worker "logical replication launcher" (PID 52) exited with exit code 1
db_1 | 2020-08-30 15:33:53.409 UTC [47] LOG: shutting down
db_1 | 2020-08-30 15:33:53.438 UTC [45] LOG: database system is shut down
db_1 | done
db_1 | server stopped
db_1 |
db_1 | PostgreSQL init process complete; ready for start up.
db_1 |
db_1 | 2020-08-30 15:33:53.530 UTC [1] LOG: starting PostgreSQL 13beta3 (Debian 13~beta3-1.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit
db_1 | 2020-08-30 15:33:53.531 UTC [1] LOG: listening on IPv4 address "0.0.0.0", port 5432
db_1 | 2020-08-30 15:33:53.531 UTC [1] LOG: listening on IPv6 address "::", port 5432
db_1 | 2020-08-30 15:33:53.539 UTC [1] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1 | 2020-08-30 15:33:53.549 UTC [63] LOG: database system was shut down at 2020-08-30 15:33:53 UTC
db_1 | 2020-08-30 15:33:53.559 UTC [1] LOG: database system is ready to accept connections
web_1 | 2020/08/30 15:34:21 Connected to tcp://db:5432
gunicorn_web_1 exited with code 0
乍一看，你的兩個文件對我來說似乎都不錯，實際上添加一個依賴應該可以解決這個問題，但是，根據文檔，這種方式不起作用。 它表達了容器之間的依賴關系，但這並不意味着容器將等待其他容器准備就緒。
對於舊版本的Compose，我們可以添加這樣的健康檢查
healthcheck:
test: ["-U postgres"]
interval: 3s
timeout: 30s
retries: 1
但是由於它不再受支持，因此最好選擇向該服務添加手動等待/睡眠。
有一個廣泛使用的 bash 腳本（等待它），您可以使用它來測試和等待 TCP 主機和端口的可用性。 它也是 Compose Documentation 中推薦的解決方案。 您可以將等待它復制到您的文件中並立即開始使用它。
web:
command: /wait-for-it.sh db:5432
你也可能想看看這個： Wait for it usage with docker
我知道這是一個典型的問題，但是我需要社區的幫助來解決。 當我運行docker-compose時，連接被拒絕：服務器是否在主機“ db”（172.21.0.2）上運行並在端口5432上接受web_1 TCP / IP連接？ docker-compose的Web部分失敗，但是db運行。 我可以使用localhost：5432連接到數據庫。 這不是一個等待問題，因為tiangolo / uvicorn-gunicorn：python3.8-alpine3.10實現了一個等待機制-dockerize。 有人知道問題出在哪里嗎？ 也許有人能為我指出正確的方向？ 所以我的Dockerfile是
FROM tiangolo/uvicorn-gunicorn:python3.8-alpine3.10
# copy requirements file
COPY ./requirements.txt /usr/src/app/requirements.txt
# install dependencies
RUN set -eux \
&& apk add --no-cache --virtual .build-deps build-base \
libressl-dev libffi-dev gcc musl-dev python3-dev \
postgresql-dev openssl \
&& pip install --upgrade pip setuptools wheel \
&& pip install -r /usr/src/app/requirements.txt \
&& rm -rf /root/.cache/pip
# copy project
COPY . /app
我的碼頭工人組成是：
version: '3.7'
services:
db:
image: postgres:13-alpine
volumes:
- postgres_data:/var/lib/postgresql/data/
ports:
- 5432:5432
environment:
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=postgres
- POSTGRES_DB=api
web:
build: ./src
ports:
- 80:80
depends_on:
- db
environment:
- DATABASE_URL=postgresql://postgres:postgres@db/api
volumes:
postgres_data:
我使用dockerize添加了一個等待，但是Web部分失敗了：
Attaching to gunicorn_db_1, gunicorn_web_1
db_1 | The files belonging to this database system will be owned by user "postgres".
db_1 | This user must also own the server process.
db_1 |
db_1 | The database cluster will be initialized with locale "en_US.utf8".
db_1 | The default database encoding has accordingly been set to "UTF8".
db_1 | The default text search configuration will be set to "english".
db_1 |
db_1 | Data page checksums are disabled.
db_1 |
db_1 | fixing permissions on existing directory /var/lib/postgresql/data ... ok
db_1 | creating subdirectories ... ok
db_1 | selecting dynamic shared memory implementation ... posix
db_1 | selecting default max_connections ... 100
db_1 | selecting default shared_buffers ... 128MB
web_1 | 2020/08/30 15:33:51 Waiting for: tcp://db:5432
web_1 | 2020/08/30 15:33:51 Problem with dial: dial tcp 172.21.0.2:5432: connect: connection refused. Sleeping 30s
db_1 | selecting default time zone ... Etc/UTC
db_1 | creating configuration files ... ok
db_1 | running bootstrap script ... ok
db_1 | performing post-bootstrap initialization ... ok
db_1 | syncing data to disk ... initdb: warning: enabling "trust" authentication for local connections
db_1 | You can change this by editing pg_hba.conf or using the option -A, or
db_1 | --auth-local and --auth-host, the next time you run initdb.
db_1 | ok
db_1 |
db_1 |
db_1 | Success. You can now start the database server using:
db_1 |
db_1 | pg_ctl -D /var/lib/postgresql/data -l logfile start
db_1 |
db_1 | waiting for server to start....2020-08-30 15:33:53.037 UTC [45] LOG: starting PostgreSQL 13beta3 (Debian 13~beta3-1.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit
db_1 | 2020-08-30 15:33:53.044 UTC [45] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1 | 2020-08-30 15:33:53.059 UTC [46] LOG: database system was shut down at 2020-08-30 15:33:52 UTC
db_1 | 2020-08-30 15:33:53.066 UTC [45] LOG: database system is ready to accept connections
db_1 | done
db_1 | server started
db_1 | CREATE DATABASE
db_1 |
db_1 |
db_1 | /usr/local/bin/docker-entrypoint.sh: ignoring /docker-entrypoint-initdb.d/*
db_1 |
db_1 | 2020-08-30 15:33:53.399 UTC [45] LOG: received fast shutdown request
db_1 | waiting for server to shut down....2020-08-30 15:33:53.404 UTC [45] LOG: aborting any active transactions
db_1 | 2020-08-30 15:33:53.407 UTC [45] LOG: background worker "logical replication launcher" (PID 52) exited with exit code 1
db_1 | 2020-08-30 15:33:53.409 UTC [47] LOG: shutting down
db_1 | 2020-08-30 15:33:53.438 UTC [45] LOG: database system is shut down
db_1 | done
db_1 | server stopped
db_1 |
db_1 | PostgreSQL init process complete; ready for start up.
db_1 |
db_1 | 2020-08-30 15:33:53.530 UTC [1] LOG: starting PostgreSQL 13beta3 (Debian 13~beta3-1.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit
db_1 | 2020-08-30 15:33:53.531 UTC [1] LOG: listening on IPv4 address "0.0.0.0", port 5432
db_1 | 2020-08-30 15:33:53.531 UTC [1] LOG: listening on IPv6 address "::", port 5432
db_1 | 2020-08-30 15:33:53.539 UTC [1] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1 | 2020-08-30 15:33:53.549 UTC [63] LOG: database system was shut down at 2020-08-30 15:33:53 UTC
db_1 | 2020-08-30 15:33:53.559 UTC [1] LOG: database system is ready to accept connections
web_1 | 2020/08/30 15:34:21 Connected to tcp://db:5432
gunicorn_web_1 exited with code 0
只需將 Docker-Compose 的版本更改為 version: "3.5" 即可解決問題
連接到“localhost”的服務器，端口 5432 失敗：連接被拒絕服務器是否在該主機上運行並接受 TCP/IP 連接？
[英]connection to server at "localhost" , port 5432 failed: Connection refused Is the server running on that host and accepting TCP/IP connections?
無法連接到服務器：連接被拒絕 服務器是否在主機上運行……並接受端口 5432 上的 TCP/IP 連接？
[英]could not connect to server: Connection refused Is the server running on host … and accepting TCP/IP connections on port 5432?
無法連接到服務器：連接被拒絕 服務器是否在主機“127.0.0.1”上運行並接受端口 5432 上的 TCP/IP 連接？
[英]Could not connect to server: Connection refused Is the server running on host “127.0.0.1” and accepting TCP/IP connections on port 5432?
psql：無法連接到服務器：連接被拒絕服務器是否在主機“ localhost”（:: 1）上運行並在端口5432上接受TCP / IP連接？
[英]psql: could not connect to server: Connection refused Is the server running on host “localhost” (::1) and accepting TCP/IP connections on port 5432?
Postgresql：連接被拒絕 服務器是否在主機“127.0.01”（127.0.0.1）上運行並接受端口 5432 上的 TCP/IP 連接？
[英]Postgresql: Connection refused Is the server running on host “127.0.01” (127.0.0.1) and accepting TCP/IP connections on port 5432?
無法連接到服務器：連接被拒絕。 服務器是否在主機“localhost”(127.0.0.1) 上運行並在端口 5432 上接受 TCP/IP 連接
[英]could not connect to server: Connection refused. Is the server running on host "localhost" (127.0.0.1) and accepting TCP/IP connections on port 5432
HEROKU POSTRES錯誤：連接被拒絕服務器是否在主機“..compute-1.amazonaws.com ...”上運行並接受端口5432上的TCP / IP連接？
[英]HEROKU POSTRES error: Connection refused Is the server running on host “..compute-1.amazonaws.com…” and accepting TCP/IP connections on port 5432?
服務器是否在主機“localhost”(::1) 上運行並在端口 5432 上接受 TCP/IP 連接？
[英]Is the server running on host "localhost" (::1) and accepting TCP/IP connections on port 5432?
Django/Postgresql：服務器是否在主機“xxx”上運行並接受端口 5432 上的 TCP/IP 連接？
[英]Django/Postgresql : Is the server running on host "xxx" and accepting TCP/IP connections on port 5432?
EC2 和 RDS 上的 Django 應用程序（服務器是否在主機“localhost”（127.0.0.1）上運行並在端口 5432 上接受 TCP/IP 連接？）
[英]Django application on EC2 and RDS ( Is the server running on host "localhost" (127.0.0.1) and accepting TCP/IP connections on port 5432?)
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