小贝子编程

从手动Docker主机网络传递到Docker Compose网桥



我有两个docker镜像，一个是modbus服务器和一个客户端，我用docker run --network host server手动运行，与客户端运行相同，工作非常完美。但现在我需要将它们添加到一个docker撰写的文件中，其中网络是桥接的，我这样做了：

autoserver:
image: 19mikel95/pymodmikel:autoserversynchub
container_name: autoserver
restart: unless-stopped
clientperf:
image: 19mikel95/pymodmikel:reloadcomp
container_name: clientperf
restart: unless-stopped
depends_on:
- autoserver
links:
- "autoserver:server"

我读到，要从一个容器引用到另一个容器(客户端到服务器(，我必须使用dockercompose YML(自动服务器(中的服务名称，所以我就是这么做的。在客户端中执行的python文件(即pymodbus中的performance.py(中，我将"localhost"更改为：

host = 'autoserver'
client = ModbusTcpClient(host, port=5020)

然而，我得到了这个错误：

[ERROR/MainProcess]未能成功运行测试Traceback(大多数最近通话最后(：文件"；performance.py"；，第72行，in单客户端测试client.read_holding_registers(10，1，单位=1(文件"//usr/lib/python3/dist-packages/pymodbus/client/common.py"；，线114，在read_holding_registers中return self-execute(request(File"//usr/lib/python3/dist-packages/pymodbus/client/sync.py"；，第107行，in处决引发ConnectionException("无法连接[%s]"%(self.str((((pymodbus.exceptions.ConnectionException：Modbus错误：[Connection]未能connect[ModbusTcpClient(自动服务器：5020(]

正如所问，我的完整码头撰写YML是这样的：

version: '2.1'
networks:
monitor-net:
driver: bridge
volumes:
prometheus_data: {}
grafana_data: {}
services:
prometheus:
image: prom/prometheus:latest
container_name: prometheus
volumes:
- ./prometheus:/etc/prometheus
- prometheus_data:/prometheus
command:
- '--config.file=/etc/prometheus/prometheus.yml'
- '--storage.tsdb.path=/prometheus'
- '--web.console.libraries=/etc/prometheus/console_libraries'
- '--web.console.templates=/etc/prometheus/consoles'
- '--storage.tsdb.retention.time=200h'
- '--web.enable-lifecycle'
restart: unless-stopped
expose:
- 9090
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
alertmanager:
image: prom/alertmanager:latest
container_name: alertmanager
volumes:
- ./alertmanager:/etc/alertmanager
command:
- '--config.file=/etc/alertmanager/config.yml'
- '--storage.path=/alertmanager'
restart: unless-stopped
expose:
- 9093
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
nodeexporter:
image: prom/node-exporter:latest
container_name: nodeexporter
volumes:
- /proc:/host/proc:ro
- /sys:/host/sys:ro
- c::/rootfs:ro
command:
- '--path.procfs=/host/proc'
- '--path.rootfs=/rootfs'
- '--path.sysfs=/host/sys'
- '--collector.filesystem.ignored-mount-points=^/(sys|proc|dev|host|etc)($$|/)'
restart: unless-stopped
expose:
- 9100
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
cadvisor:
image: gcr.io/google-containers/cadvisor:latest
container_name: cadvisor
volumes:
- c::/rootfs:ro
- /var/run:/var/run:rw
- /sys:/sys:ro
- /var/lib/docker:/var/lib/docker:ro
#- /cgroup:/cgroup:ro #doesn't work on MacOS only for Linux
restart: unless-stopped
expose:
- 8080
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
grafana:
image: grafana/grafana:latest
container_name: grafana
volumes:
- grafana_data:/var/lib/grafana
- ./grafana/provisioning:/etc/grafana/provisioning
environment:
- GF_SECURITY_ADMIN_USER=${ADMIN_USER:-admin}
- GF_SECURITY_ADMIN_PASSWORD=${ADMIN_PASSWORD:-admin}
- GF_USERS_ALLOW_SIGN_UP=false
restart: unless-stopped
expose:
- 3000
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
pushgateway:
image: prom/pushgateway:latest
container_name: pushgateway
restart: unless-stopped
expose:
- 9091
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
caddy:
image: stefanprodan/caddy
container_name: caddy
ports:
- "3000:3000"
- "9090:9090"
- "9093:9093"
- "9091:9091"
volumes:
- ./caddy:/etc/caddy
environment:
- ADMIN_USER=${ADMIN_USER:-admin}
- ADMIN_PASSWORD=${ADMIN_PASSWORD:-admin}
restart: unless-stopped
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
autoserver:
image: 19mikel95/pymodmikel:autoserversynchub
container_name: autoserver
ports:
- "5020:5020"
restart: unless-stopped
networks:
- monitor-net
clientperf:
image: 19mikel95/pymodmikel:reloadcomp
container_name: clientperf
restart: unless-stopped
networks:
- monitor-net
depends_on:
- autoserver
links:
- "autoserver:server"

问题出现在autoserver图像的sincserver.py文件的StartTcpServer(context, identity=identity, address=("localhost", 5020))中。localhost允许TcpServer仅接受来自localhost的连接。应将其替换为0.0.0.0，以便允许任何外部请求到此端口。

下面的Docker Compose显示了它(sed -i 's|localhost|0.0.0.0|g' sincserver.py代替主机名(：

version: '2.1'
services:
autoserver:
image: 19mikel95/pymodmikel:autoserversynchub
command: sh -c "
sed -i 's|localhost|0.0.0.0|g' sincserver.py;
python3 sincserver.py daemon off
"
ports:
- "5020:5020"
restart: unless-stopped
clientperf:
image: 19mikel95/pymodmikel:reloadcomp
restart: unless-stopped
depends_on:
- autoserver

运行：

docker-compose up -d
docker-compose logs -f clientperf

你会看到类似的日志

clientperf_1  | [DEBUG/MainProcess] 574 requests/second
clientperf_1  | [DEBUG/MainProcess] time taken to complete 1000 cycle by 10 workers is 1.7410697999875993 seconds
clientperf_1  | [DEBUG/MainProcess] 692 requests/second
clientperf_1  | [DEBUG/MainProcess] time taken to complete 1000 cycle by 10 workers is 1.4434449000109453 seconds
clientperf_1  | [DEBUG/MainProcess] 708 requests/second
clientperf_1  | [DEBUG/MainProcess] time taken to complete 1000 cycle by 10 workers is 1.4116760999895632 seconds
clientperf_1  | [DEBUG/MainProcess] 890 requests/second
clientperf_1  | [DEBUG/MainProcess] time taken to complete 1000 cycle by 10 workers is 1.1230684999900404 seconds
clientperf_1  | [DEBUG/MainProcess] 803 requests/second
clientperf_1  | [DEBUG/MainProcess] time taken to complete 1000 cycle by 10 workers is 1.2450218999874778 seconds
clientperf_1  | [DEBUG/MainProcess] 753 requests/second
clientperf_1  | [DEBUG/MainProcess] time taken to complete 1000 cycle by 10 workers is 1.3274328999978025 seconds
clientperf_1  | [DEBUG/MainProcess] 609 requests/second
clientperf_1  | [DEBUG/MainProcess] time taken to complete 1000 cycle by 10 workers is 1.6399398999928962 seconds

您可以尝试使用类似AUTO_SERVER_HOST的env变量，并在代码中调用它

version: '2.1'
networks:
monitor-net:
driver: bridge
volumes:
prometheus_data: {}
grafana_data: {}
services:
prometheus:
image: prom/prometheus:latest
container_name: prometheus
volumes:
- ./prometheus:/etc/prometheus
- prometheus_data:/prometheus
command:
- '--config.file=/etc/prometheus/prometheus.yml'
- '--storage.tsdb.path=/prometheus'
- '--web.console.libraries=/etc/prometheus/console_libraries'
- '--web.console.templates=/etc/prometheus/consoles'
- '--storage.tsdb.retention.time=200h'
- '--web.enable-lifecycle'
restart: unless-stopped
expose:
- 9090
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
alertmanager:
image: prom/alertmanager:latest
container_name: alertmanager
volumes:
- ./alertmanager:/etc/alertmanager
command:
- '--config.file=/etc/alertmanager/config.yml'
- '--storage.path=/alertmanager'
restart: unless-stopped
expose:
- 9093
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
nodeexporter:
image: prom/node-exporter:latest
container_name: nodeexporter
volumes:
- /proc:/host/proc:ro
- /sys:/host/sys:ro
- c::/rootfs:ro
command:
- '--path.procfs=/host/proc'
- '--path.rootfs=/rootfs'
- '--path.sysfs=/host/sys'
- '--collector.filesystem.ignored-mount-points=^/(sys|proc|dev|host|etc)($$|/)'
restart: unless-stopped
expose:
- 9100
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
cadvisor:
image: gcr.io/google-containers/cadvisor:latest
container_name: cadvisor
volumes:
- c::/rootfs:ro
- /var/run:/var/run:rw
- /sys:/sys:ro
- /var/lib/docker:/var/lib/docker:ro
#- /cgroup:/cgroup:ro #doesn't work on MacOS only for Linux
restart: unless-stopped
expose:
- 8080
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
grafana:
image: grafana/grafana:latest
container_name: grafana
volumes:
- grafana_data:/var/lib/grafana
- ./grafana/provisioning:/etc/grafana/provisioning
environment:
- GF_SECURITY_ADMIN_USER=${ADMIN_USER:-admin}
- GF_SECURITY_ADMIN_PASSWORD=${ADMIN_PASSWORD:-admin}
- GF_USERS_ALLOW_SIGN_UP=false
restart: unless-stopped
expose:
- 3000
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
pushgateway:
image: prom/pushgateway:latest
container_name: pushgateway
restart: unless-stopped
expose:
- 9091
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
caddy:
image: stefanprodan/caddy
container_name: caddy
ports:
- "3000:3000"
- "9090:9090"
- "9093:9093"
- "9091:9091"
volumes:
- ./caddy:/etc/caddy
environment:
- ADMIN_USER=${ADMIN_USER:-admin}
- ADMIN_PASSWORD=${ADMIN_PASSWORD:-admin}
restart: unless-stopped
networks:
- monitor-net
labels:
org.label-schema.group: "monitoring"
autoserver:
image: 19mikel95/pymodmikel:autoserversynchub
container_name: autoserver
ports:
- "5020:5020"
restart: unless-stopped
networks:
- monitor-net
clientperf:
image: 19mikel95/pymodmikel:reloadcomp
container_name: clientperf
restart: unless-stopped
networks:
- monitor-net
depends_on:
- autoserver
environment:
- AUTO_SERVER_HOST=autoserver

调用环境变量，如下

host = os.environ['AUTO_SERVER_HOST']
client = ModbusTcpClient(host, port=5020)

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