应用程序无法使用 docker-compose 连接到 Postgresql 数据库
App couldn't connect to Postgresql Database with docker-compose
我正在尝试使用 docker-compose 获取我的 Web 应用程序 运行。
我的 Dockerfile
FROM golang:1.15
WORKDIR /goprojects/vnlist
COPY . .
RUN go get github.com/revel/revel
RUN go get github.com/revel/cmd/revel
RUN go get -d -v ./...
EXPOSE 9000
CMD [ "revel", "run", "-a", "vnlist" ]
我的docker-compose.yml
version: '3.3'
services:
web:
build: .
ports:
- "9000:9000"
db:
image: "postgres"
environment:
POSTGRES_USER: "postgres"
POSTGRES_PASSWORD: "postgresql123"
POSTGRES_DB: "vnlist_db"
volumes:
- db-data:/foo
volumes:
db-data:
数据库设置文件
package models
import (
"fmt"
"gorm.io/driver/postgres"
"gorm.io/gorm"
)
var DB *gorm.DB
var (
DB_HOST = "localhost"
DB_PORT = "5432"
DB_USER = "postgres"
DB_PASSWORD = "postgresql123"
DB_NAME = "vnlist_db"
DB_TIMEZONE = "Asia/Jakarta"
)
func InitDB() {
dsn := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=disable",
DB_HOST, DB_PORT, DB_USER, DB_PASSWORD, DB_NAME)
db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})
if err != nil {
fmt.Println("DB Error: ", err)
}
db.AutoMigrate(&VN{}, &User{})
DB = db
}
然后，我运行docker-compose up --build。这是命令的结果：
Successfully built 1239cf1fceea
Successfully tagged vnlist_web:latest
Creating vnlist_db_1 ... done
Creating vnlist_web_1 ... done
Attaching to vnlist_db_1, vnlist_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 default max_connections ... 100
db_1 | selecting default shared_buffers ... 128MB
db_1 | selecting default timezone ... Etc/UTC
db_1 | selecting dynamic shared memory implementation ... posix
db_1 | creating configuration files ... ok
web_1 | Revel executing: run a Revel application
db_1 | running bootstrap script ... ok
db_1 | performing post-bootstrap initialization ... ok
db_1 | syncing data to disk ... ok
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 |
db_1 | 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 | waiting for server to start....2021-01-18 14:25:35.070 UTC [47] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1 | 2021-01-18 14:25:35.437 UTC [48] LOG: database system was shut down at 2021-01-18 14:25:30 UTC
db_1 | 2021-01-18 14:25:35.530 UTC [47] LOG: database system is ready to accept connections
db_1 | done
db_1 | server started
web_1 | WARN 14:25:35 harness.go:175: No http.addr specified in the app.conf listening on localhost interface only. This will not allow external access
to your application
web_1 | Changed detected, recompiling
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 | waiting for server to shut down....2021-01-18 14:25:39.271 UTC [47] LOG: received fast shutdown request
db_1 | 2021-01-18 14:25:39.420 UTC [47] LOG: aborting any active transactions
db_1 | 2021-01-18 14:25:39.424 UTC [47] LOG: background worker "logical replication launcher" (PID 54) exited with exit code 1
db_1 | 2021-01-18 14:25:39.424 UTC [49] LOG: shutting down
db_1 | .2021-01-18 14:25:41.059 UTC [47] 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 | 2021-01-18 14:25:41.178 UTC [1] LOG: listening on IPv4 address "0.0.0.0", port 5432
db_1 | 2021-01-18 14:25:41.178 UTC [1] LOG: listening on IPv6 address "::", port 5432
db_1 | 2021-01-18 14:25:41.445 UTC [1] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1 | 2021-01-18 14:25:41.906 UTC [75] LOG: database system was shut down at 2021-01-18 14:25:40 UTC
db_1 | 2021-01-18 14:25:42.031 UTC [1] LOG: database system is ready to accept connections
web_1 | Parsing packages, (may require download if not cached)... Completed
web_1 | INFO 14:27:12 app run.go:35: Running revel server
web_1 | INFO 14:27:12 app plugin.go:9: Go to /@tests to run the tests.
web_1 |
web_1 | 2021/01/18 14:27:12 /goprojects/vnlist/app/models/DbSetup.go:24
web_1 | [error] failed to initialize database, got error failed to connect to `host=localhost user=postgres database=vnlist_db`: dial error (dial tcp [::1]:5432: connect: cannot assign requested address)
web_1 | DB Error: failed to connect to `host=localhost user=postgres database=vnlist_db`: dial error (dial tcp [::1]:5432: connect: cannot assign requested address)
web_1 |
web_1 | 2021/01/18 14:27:12 /root/go/pkg/mod/gorm.io/driver/postgres@v1.0.6/migrator.go:157 failed to connect to `host=localhost user=postgres database=vnlist_db`: dial error (dial tcp [::1]:5432: connect: cannot assign requested address)
web_1 | [0.659ms] [rows:0] CREATE TABLE "vns" ("id" bigserial,"created_at" timestamptz,"updated_at" timestamptz,"deleted_at" timestamptz,"title" text,"genre" text,"original_language" text,"translated" boolean,PRIMARY KEY ("id"))
web_1 |
web_1 | 2021/01/18 14:27:12 /root/go/pkg/mod/gorm.io/driver/postgres@v1.0.6/migrator.go:130 failed to connect to `host=localhost user=postgres database=vnlist_db`: dial error (dial tcp [::1]:5432: connect: cannot assign requested address)
web_1 | [1.093ms] [rows:0] CREATE INDEX "idx_vns_deleted_at" ON "vns" ("deleted_at")
web_1 | Revel engine is listening on.. localhost:35495
web_1 |
web_1 | Time to recompile 1m36.9527518s
web_1 | Revel proxy is listening, point your browser to : 9000
正如我们在最后几行中看到的，数据库连接失败。
我已尝试更改数据库的凭据，但问题仍然存在。
我的问题是，如何解决这个问题？
您的 DB_HOST 将是数据库服务的名称 DB_HOST = "db" 而不是“localhost”
我正在尝试使用 docker-compose 获取我的 Web 应用程序 运行。
我的 Dockerfile
FROM golang:1.15
WORKDIR /goprojects/vnlist
COPY . .
RUN go get github.com/revel/revel
RUN go get github.com/revel/cmd/revel
RUN go get -d -v ./...
EXPOSE 9000
CMD [ "revel", "run", "-a", "vnlist" ]
我的docker-compose.yml
version: '3.3'
services:
web:
build: .
ports:
- "9000:9000"
db:
image: "postgres"
environment:
POSTGRES_USER: "postgres"
POSTGRES_PASSWORD: "postgresql123"
POSTGRES_DB: "vnlist_db"
volumes:
- db-data:/foo
volumes:
db-data:
数据库设置文件
package models
import (
"fmt"
"gorm.io/driver/postgres"
"gorm.io/gorm"
)
var DB *gorm.DB
var (
DB_HOST = "localhost"
DB_PORT = "5432"
DB_USER = "postgres"
DB_PASSWORD = "postgresql123"
DB_NAME = "vnlist_db"
DB_TIMEZONE = "Asia/Jakarta"
)
func InitDB() {
dsn := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=disable",
DB_HOST, DB_PORT, DB_USER, DB_PASSWORD, DB_NAME)
db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})
if err != nil {
fmt.Println("DB Error: ", err)
}
db.AutoMigrate(&VN{}, &User{})
DB = db
}
然后，我运行docker-compose up --build。这是命令的结果：
Successfully built 1239cf1fceea
Successfully tagged vnlist_web:latest
Creating vnlist_db_1 ... done
Creating vnlist_web_1 ... done
Attaching to vnlist_db_1, vnlist_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 default max_connections ... 100
db_1 | selecting default shared_buffers ... 128MB
db_1 | selecting default timezone ... Etc/UTC
db_1 | selecting dynamic shared memory implementation ... posix
db_1 | creating configuration files ... ok
web_1 | Revel executing: run a Revel application
db_1 | running bootstrap script ... ok
db_1 | performing post-bootstrap initialization ... ok
db_1 | syncing data to disk ... ok
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 |
db_1 | 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 | waiting for server to start....2021-01-18 14:25:35.070 UTC [47] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1 | 2021-01-18 14:25:35.437 UTC [48] LOG: database system was shut down at 2021-01-18 14:25:30 UTC
db_1 | 2021-01-18 14:25:35.530 UTC [47] LOG: database system is ready to accept connections
db_1 | done
db_1 | server started
web_1 | WARN 14:25:35 harness.go:175: No http.addr specified in the app.conf listening on localhost interface only. This will not allow external access
to your application
web_1 | Changed detected, recompiling
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 | waiting for server to shut down....2021-01-18 14:25:39.271 UTC [47] LOG: received fast shutdown request
db_1 | 2021-01-18 14:25:39.420 UTC [47] LOG: aborting any active transactions
db_1 | 2021-01-18 14:25:39.424 UTC [47] LOG: background worker "logical replication launcher" (PID 54) exited with exit code 1
db_1 | 2021-01-18 14:25:39.424 UTC [49] LOG: shutting down
db_1 | .2021-01-18 14:25:41.059 UTC [47] 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 | 2021-01-18 14:25:41.178 UTC [1] LOG: listening on IPv4 address "0.0.0.0", port 5432
db_1 | 2021-01-18 14:25:41.178 UTC [1] LOG: listening on IPv6 address "::", port 5432
db_1 | 2021-01-18 14:25:41.445 UTC [1] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1 | 2021-01-18 14:25:41.906 UTC [75] LOG: database system was shut down at 2021-01-18 14:25:40 UTC
db_1 | 2021-01-18 14:25:42.031 UTC [1] LOG: database system is ready to accept connections
web_1 | Parsing packages, (may require download if not cached)... Completed
web_1 | INFO 14:27:12 app run.go:35: Running revel server
web_1 | INFO 14:27:12 app plugin.go:9: Go to /@tests to run the tests.
web_1 |
web_1 | 2021/01/18 14:27:12 /goprojects/vnlist/app/models/DbSetup.go:24
web_1 | [error] failed to initialize database, got error failed to connect to `host=localhost user=postgres database=vnlist_db`: dial error (dial tcp [::1]:5432: connect: cannot assign requested address)
web_1 | DB Error: failed to connect to `host=localhost user=postgres database=vnlist_db`: dial error (dial tcp [::1]:5432: connect: cannot assign requested address)
web_1 |
web_1 | 2021/01/18 14:27:12 /root/go/pkg/mod/gorm.io/driver/postgres@v1.0.6/migrator.go:157 failed to connect to `host=localhost user=postgres database=vnlist_db`: dial error (dial tcp [::1]:5432: connect: cannot assign requested address)
web_1 | [0.659ms] [rows:0] CREATE TABLE "vns" ("id" bigserial,"created_at" timestamptz,"updated_at" timestamptz,"deleted_at" timestamptz,"title" text,"genre" text,"original_language" text,"translated" boolean,PRIMARY KEY ("id"))
web_1 |
web_1 | 2021/01/18 14:27:12 /root/go/pkg/mod/gorm.io/driver/postgres@v1.0.6/migrator.go:130 failed to connect to `host=localhost user=postgres database=vnlist_db`: dial error (dial tcp [::1]:5432: connect: cannot assign requested address)
web_1 | [1.093ms] [rows:0] CREATE INDEX "idx_vns_deleted_at" ON "vns" ("deleted_at")
web_1 | Revel engine is listening on.. localhost:35495
web_1 |
web_1 | Time to recompile 1m36.9527518s
web_1 | Revel proxy is listening, point your browser to : 9000
正如我们在最后几行中看到的，数据库连接失败。
我已尝试更改数据库的凭据，但问题仍然存在。
我的问题是，如何解决这个问题？
您的 DB_HOST 将是数据库服务的名称 DB_HOST = "db" 而不是“localhost”