[英]Why won't my Docker PostgreSQL container run anymore?
自從我將 Windows 的 Docker 桌面從 2.1.0.5 更新到版本 2.2.0.3 以來,我的應用程序的 db 容器出現了問題。 之前在 2.1.0.5 上這一切都很好,但現在即使在我刪除 2.2.0.3 並恢復到 2.1.0.5 之后它也無法工作。 真希望我現在沒有更新。
我得到的錯誤是:
could not translate host name "db" to address: Name or service not known
當我運行 docker ps 時,我可以看到 postgres 容器甚至沒有運行。
我嘗試過的一些事情是:
將 db 添加到我的 Windows 10 主機文件中。
在 docker-compose.yml 中為數據庫公開端口 5432
沒有任何效果。
任何人都可以提供任何見解來幫助我理解和解決問題嗎?
我的 Docker 文件:
FROM ruby:2.5
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs
RUN mkdir /my-app
WORKDIR /my-app
RUN echo 'gem: --no-document' >> ~/.gemrc
COPY . /my-app
EXPOSE 3000
我的 docker-compose.yml:
version: '3'
services:
db:
image: postgres
volumes:
- postgres:/var/lib/postgresql/data/
redis:
image: 'redis:4-alpine'
environment:
- REDIS_DISABLE_COMMANDS=FLUSHDB,FLUSHALL
ports:
- '6379:6379'
command: redis-server --requirepass somepassword
volumes:
- redis:/data/
myapp:
build: ./myapp/
command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
environment:
- RAILS_ENV=development
- PORT=3000
- REDIS_URL=redis://:somepassword@redis:6379/0
ports:
- '3000:3000'
working_dir: /myapp/
volumes:
- ./myapp:/myapp:cached
- myapp_gems:/usr/local/bundle/
- /myapp/tmp/
depends_on:
- db
- redis
myapp_sidekiq:
build: ./myapp/
command: bash -c "rm -f tmp/pids/server.pid && bundle exec sidekiq -C config/sidekiq.yml"
environment:
- RAILS_ENV=development
- PORT=3000
- REDIS_URL=redis://:somepassword@redis:6379/0
working_dir: /myapp/
volumes:
- ./myapp:/myapp:cached
- myapp_gems:/usr/local/bundle/
- /myapp/tmp/
depends_on:
- db
- redis
volumes:
postgres:
external: true
redis:
external: true
myapp_gems:
我的數據庫.yml:
# Configure Using Gemfile
# gem 'pg'
#
default: &default
adapter: postgresql
encoding: unicode
# For details on connection pooling, see rails configuration guide
# http://guides.rubyonrails.org/configuring.html#database-pooling
pool: 5
host: db
username: postgres
password:
編輯:為了回應@Brits,這里是 docker-compose up db 的輸出:
Attaching to dev_db_1
db_1 | Error: Database is uninitialized and superuser password is not specified.
db_1 | You must specify POSTGRES_PASSWORD to a non-empty value for the
db_1 | superuser. For example, "-e POSTGRES_PASSWORD=password" on "docker run".
db_1 |
db_1 | You may also use "POSTGRES_HOST_AUTH_METHOD=trust" to allow all
db_1 | connections without a password. This is *not* recommended.
db_1 |
db_1 | See PostgreSQL documentation about "trust":
db_1 | https://www.postgresql.org/docs/current/auth-trust.html
dev_db_1 exited with code 1
這很有趣,因為我之前沒有指定 POSTGRES_PASSWORD,它運行良好。
感謝@Brits,我能夠找到問題所在。 這是由最近對 docker-library/postgres 的未公開更改引起的,該更改需要默認指定 POSTGRES_PASSWORD,如此Github 問題中所指出的
感謝@Brits,我能夠找到問題所在。
這是由最近對 docker-library/postgres 的未公開更改引起的,該更改需要默認指定 POSTGRES_PASSWORD,如此Github 問題中所指出的
以下是修復方法:
將 POSTGRES_PASSWORD 作為環境變量添加到 docker-compose.yml(postgres 容器以及應用程序容器):
version: '3'
services:
db:
image: postgres
environment:
- POSTGRES_PASSWORD=somepassword
volumes:
- postgres:/var/lib/postgresql/data/
redis:
image: 'redis:4-alpine'
environment:
- REDIS_DISABLE_COMMANDS=FLUSHDB,FLUSHALL
ports:
- '6379:6379'
command: redis-server --requirepass somepassword
volumes:
- redis:/data/
myapp:
build: ./myapp/
command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
environment:
- RAILS_ENV=development
- PORT=3000
- REDIS_URL=redis://:somepassword@redis:6379/0
- POSTGRES_PASSWORD=somepassword
ports:
- '3000:3000'
working_dir: /myapp/
volumes:
- ./myapp:/myapp:cached
- myapp_gems:/usr/local/bundle/
- /myapp/tmp/
depends_on:
- db
- redis
myapp_sidekiq:
build: ./myapp/
command: bash -c "rm -f tmp/pids/server.pid && bundle exec sidekiq -C config/sidekiq.yml"
environment:
- RAILS_ENV=development
- PORT=3000
- REDIS_URL=redis://:somepassword@redis:6379/0
working_dir: /myapp/
volumes:
- ./myapp:/myapp:cached
- myapp_gems:/usr/local/bundle/
- /myapp/tmp/
depends_on:
- db
- redis
volumes:
postgres:
external: true
redis:
external: true
myapp_gems:
然后在應用的 database.yml 中為 POSTGRES_PASSWORD 添加 ENV 變量:
# Configure Using Gemfile
# gem 'pg'
#
default: &default
adapter: postgresql
encoding: unicode
# For details on connection pooling, see rails configuration guide
# http://guides.rubyonrails.org/configuring.html#database-pooling
pool: 5
host: db
username: postgres
password: <%= ENV['POSTGRES_PASSWORD'] %>
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.