Я пытаюсь решить этот вопрос относительно экспортера PostgreSQL в Prometheus (https://github.com/wrouesnel/postgres_exporter), Prometheus Пример экспортера сервера PostgreSQL, не работающего на MacOS? , с контейнерами postgres и postgres_exporterподключен к пользовательской мостовой сети, а не к хост-сети, которая, похоже, не работает в Docker Desktop для Mac. Я создал следующее docker-compose.yml:
version: "3"
services:
db:
image: postgres
environment:
POSTGRES_PASSWORD: mypassword
networks:
- mynetwork
exporter:
image: wrouesnel/postgres_exporter
environment:
DATA_SOURCE_NAME: "postgresql://postgres:mypassword@db:5432/postgres?sslmode=disable"
ports:
- "9187:9187"
networks:
- mynetwork
networks:
mynetwork:
У меня две проблемы сэто, однако. Во-первых, журналы от службы exporter показывают ошибку с этим сообщением:
"Ошибка открытия соединения с базой данных (postgresql: // postgres: PASSWORD_REMOVED @ db: 5432 / postgres? sslmode = отключить): набрать tcp 172.18.0.2:5432: подключиться: соединение отклонено "
Вот полный вывод:
> docker-compose up
Creating network "postgres-performance-testing_mynetwork" with the default driver
Creating postgres-performance-testing_db_1 ... done
Creating postgres-performance-testing_exporter_1 ... done
Attaching to postgres-performance-testing_db_1, postgres-performance-testing_exporter_1
exporter_1 | time="2019-10-03T20:16:56Z" level=info msg="Established new database connection to \"db:5432\"." source="postgres_exporter.go:778"
exporter_1 | time="2019-10-03T20:16:56Z" level=error msg="Error opening connection to database (postgresql://postgres:PASSWORD_REMOVED@db:5432/postgres?sslmode=disable): dial tcp 172.18.0.2:5432: connect: connection refused" source="postgres_exporter.go:1348"
exporter_1 | time="2019-10-03T20:16:56Z" level=info msg="Starting Server: :9187" source="postgres_exporter.go:1459"
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
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....2019-10-03 20:16:57.084 UTC [42] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1 | 2019-10-03 20:16:57.095 UTC [43] LOG: database system was shut down at 2019-10-03 20:16:56 UTC
db_1 | 2019-10-03 20:16:57.101 UTC [42] LOG: database system is ready to accept connections
db_1 | done
db_1 | server started
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...2019-10-03 20:16:57.180 UTC [42] LOG: received fast shutdown request
db_1 | .2019-10-03 20:16:57.182 UTC [42] LOG: aborting any active transactions
db_1 | 2019-10-03 20:16:57.186 UTC [42] LOG: background worker "logical replication launcher" (PID 49) exited with exit code 1
db_1 | 2019-10-03 20:16:57.186 UTC [44] LOG: shutting down
db_1 | 2019-10-03 20:16:57.197 UTC [42] 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 | 2019-10-03 20:16:57.297 UTC [1] LOG: listening on IPv4 address "0.0.0.0", port 5432
db_1 | 2019-10-03 20:16:57.297 UTC [1] LOG: listening on IPv6 address "::", port 5432
db_1 | 2019-10-03 20:16:57.299 UTC [1] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1 | 2019-10-03 20:16:57.310 UTC [51] LOG: database system was shut down at 2019-10-03 20:16:57 UTC
db_1 | 2019-10-03 20:16:57.314 UTC [1] LOG: database system is ready to accept connections
Это из-за экспортера Prometheusпытаться подключиться к базе данных, прежде чем она будет готова принимать подключения? (Это может показаться из последовательности записи в журнал).
Другая проблема заключается в том, что если я просматриваюна localhost:9187, в результате я загружаю файл, содержащий HTML, а не вижу ссылку на /metrics, по которой я могу перейти:
Есть идеи, как мне решить эти проблемы?