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[英]Docker container connect to MySQL database locally -> redirect to another container
[英]Connect from a docker container to a mysql database in another container
我想使用以下文件夾配置從 app 容器訪問 db 容器中的 mariadb,但它不會出現錯誤。
.
├── app
│ └── Dockerfile
├── db
│ └── Dockerfile
└── docker-compose.yml
應用程序/Dockerfile
FROM debian:buster
RUN set -x \
&& apt-get update \
&& apt-get install --no-install-recommends --no-install-suggests -y \
mariadb-client \
vim
CMD [ "tail", "-f" ]
數據庫/Dockerfile
FROM debian:buster
RUN set -x \
&& apt-get update \
&& apt-get install --no-install-recommends --no-install-suggests -y \
mariadb-server \
mariadb-client \
vim
CMD service mysql start \
&& tail -f /dev/null
docker-compose.yml
version: "3.9"
services:
app:
build: ./app
networks:
- frontend
db:
build: ./db
volumes:
- db_data:/var/lib/mysql
expose:
- 3306
networks:
- frontend
networks:
frontend:
driver: bridge
volumes:
db_data: {}
我進入應用程序容器並執行以下命令,但出現錯誤。
root@0e0ad0889639:/# mysql -h db -uroot
ERROR 2002 (HY000): Can't connect to MySQL server on 'db' (115)
root@0e0ad0889639:/# ping db
PING db (192.168.128.3) 56(84) bytes of data.
64 bytes from test_db_1.test_frontend (192.168.128.3): icmp_seq=1 ttl=64 time=0.104 ms
64 bytes from test_db_1.test_frontend (192.168.128.3): icmp_seq=2 ttl=64 time=0.142 ms
我怎樣才能連接?
❯ docker -v
Docker version 20.10.12, build e91ed57
❯ docker-compose -v
docker-compose version 1.29.2, build 5becea4c
❯ sw_vers
ProductName: macOS
ProductVersion: 12.3
BuildVersion: 21E230
db容器中的以下方法解決了這個問題。
USE mysql;
GRANT ALL ON *.* TO 'root'@'%' identified by 'pass' WITH GRANT OPTION ;
GRANT ALL ON *.* TO 'root'@'localhost' identified by 'pass' WITH GRANT OPTION ;
FLUSH PRIVILEGES ;
echo "bind-address = app" >> etc/mysql/mariadb.conf.d/50-server.cnf
正如評論所指出的,默認的 Debian MariaDB 將bind-address
配置為本地主機。 這就是為什么Docker 庫 mariadb 鏡像刪除了那些配置項。
如果你想要的只是在你的容器中安裝一個vim
,那么可以使用以下命令來獲得維護和測試的容器鏡像的所有好處:
數據庫/Dockerfile
FROM mariadb:10.6
ENV MARIADB_ROOT_PASSWORD=pass
RUN set -x \
&& apt-get update \
&& apt-get install --no-install-recommends --no-install-suggests -y \
vim; \
rm -rf /var/lib/apt/lists/*
如果您有興趣,請注意存在小型編輯器。
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