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Foreword
In 2.8 application integration InfluxDB have a recording problem can not connect influxdb a container of notes, make a note of this in-depth analysis.
Small expert recent study ChirpStack project, should be the most influential LoRaWAN server open source projects. It is rich components, code readability strong, is a good learning materials. More study notes, you can click here to view .
Description of the problem
appserver_1 | time="2020-02-07T10:24:34Z" level=error msg="integration/multi: integration *influxdb.Integration error" error="sending measurements error: http request error: Post http://localhost:8086/write?db=db0&precision=ms&rp=: dial tcp 127.0.0.1:8086: connect: connection refused"
My host has been running ChirpStack container, again depending on the application required to open a InfluxDB container, when configured localhost in chirpstack page: When the connection address InfluxDB 8086, suggesting connection refused.
2 Analysis
docker is a virtual environment, 127.0.0.1 and localhost refers to the internal virtual environment, rather than an external host, it is not so accessible.
2.1 container network analysis
# docker network ls
NETWORK ID NAME DRIVER SCOPE
02231307198a bridge bridge local
81b1d878dd80 host host local
5284403f2094 lora-app-server_default bridge local
8de8416ca11a lora_default bridge local
d4389dfb8f38 loraserver-docker_default bridge local
49d4a4343b5e lorawan-stack-dev_default bridge local
194a422ad895 none null local
lora-app-server_default
# docker network inspect lora-app-server_default
[
{
"Name": "lora-app-server_default",
"Id": "5284403f20943bcca33e6fb7482aa1c5e714bbf05a66c5712500f35c901f1a5d",
"Created": "2019-10-29T12:37:30.514317558+08:00",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "192.168.16.0/20",
"Gateway": "192.168.16.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"46e4075d8376bd54b2d59d330a2f9924a0dff32e080f53b26200ce7845a6f65c": {
"Name": "lora-app-server_mosquitto_1",
"EndpointID": "5677bc3efacb3454d2e70d490e8c6d2bc75469080d985645ceda500940311944",
"MacAddress": "02:42:c0:a8:10:04",
"IPv4Address": "192.168.16.4/20",
"IPv6Address": ""
},
"92ee8b9f02e044c77765e723717788d67ea7434b222191e3bd9a019dc31fd17e": {
"Name": "lora-app-server_postgres_1",
"EndpointID": "0c032e0946d397ee09f14deac9cf0039c3a5bba99e8a88fcfe942a7661e322d8",
"MacAddress": "02:42:c0:a8:10:02",
"IPv4Address": "192.168.16.2/20",
"IPv6Address": ""
},
"e4201031eb7e4d4a34a165f38b8871de1e6527c16cc1cf9021993d6ec0793b11": {
"Name": "lora-app-server_redis_1",
"EndpointID": "c0b595b4f7a7fa3848aa57c9b65b77158ee16ed0ed8a744e580f68f0dac5878f",
"MacAddress": "02:42:c0:a8:10:03",
"IPv4Address": "192.168.16.3/20",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {}
}
]
loraserver-docker_default
# docker network inspect loraserver-docker_default
[
{
"Name": "loraserver-docker_default",
"Id": "d4389dfb8f38d6a023de63ca25d74c65a5b4b114fbb83a1b43263e376000a22b",
"Created": "2020-02-05T14:23:44.985567025+08:00",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "192.168.64.0/20",
"Gateway": "192.168.64.1"
}
]
},
"Internal": false,
"Attachable": true,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"0329aa3dbabb76ab7d94cd19ff0ff89a8c48cc45d710b8060800a177dc2dd214": {
"Name": "loraserver-docker_appserver_1",
"EndpointID": "1080f620260de45592ac7c824f2e7a2f68846de5764e2734cd2f0745718c326a",
"MacAddress": "02:42:c0:a8:40:07",
"IPv4Address": "192.168.64.7/20",
"IPv6Address": ""
},
"0d8afb7896f6d5ad7516c8079b2b38f6c88f2beac13ccb887273f62cd2d10538": {
"Name": "loraserver-docker_geoserver_1",
"EndpointID": "4775a6fb238a594972d8fbac20175537dc4fd83572051283484522777f42ecc5",
"MacAddress": "02:42:c0:a8:40:04",
"IPv4Address": "192.168.64.4/20",
"IPv6Address": ""
},
"4bb2a05b99aa24a524137bbc4df3bd7e19bc8e45edd558c3bfda1d0530fc5c0b": {
"Name": "loraserver-docker_postgresql_1",
"EndpointID": "8e5e035a17bca1b957dc9c2d00ef385118407ad04bff87da3ca2009bfe7eeee5",
"MacAddress": "02:42:c0:a8:40:06",
"IPv4Address": "192.168.64.6/20",
"IPv6Address": ""
},
"5e5813773f6dbc0af8136e234df9f6fd9658488fcafdf57dfdafd57cb9198c76": {
"Name": "loraserver-docker_gatewaybridge_1",
"EndpointID": "9e1956f9ed7f5cd4ca1009788a811ec243428ca4b0787b621f402b06c827375b",
"MacAddress": "02:42:c0:a8:40:08",
"IPv4Address": "192.168.64.8/20",
"IPv6Address": ""
},
"9b8a1f733e2b3e995eaac5fcdd759ea7f4926943e511f3754c66293e7910ce6e": {
"Name": "loraserver-docker_loraserver_1",
"EndpointID": "ffc5869e673c591776f07d7fc5ab95ab017c9773dd11aa403010c69551b373a0",
"MacAddress": "02:42:c0:a8:40:05",
"IPv4Address": "192.168.64.5/20",
"IPv6Address": ""
},
"c984f4f533bd904469a6afe70224baade7fffa550b345580bfe911e38235581e": {
"Name": "loraserver-docker_redis_1",
"EndpointID": "d7ebab7f77eac0beb71f207b94c7432ab04092c2c5442eeeaa1d87c7783085a1",
"MacAddress": "02:42:c0:a8:40:02",
"IPv4Address": "192.168.64.2/20",
"IPv6Address": ""
},
"cc5400f93f5454ee5033f37a8b8bd584a292429baaa7c9fd16e788bd34200407": {
"Name": "loraserver-docker_mosquitto_1",
"EndpointID": "d47e177c7785d3a0f9c0e70e707bfdfb7cbb056f1b785bfc136a503559d7d929",
"MacAddress": "02:42:c0:a8:40:03",
"IPv4Address": "192.168.64.3/20",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {
"com.docker.compose.network": "default",
"com.docker.compose.project": "loraserver-docker",
"com.docker.compose.version": "1.24.1"
}
}
]
2.2 combing container network
bridge 172.17.0.1
- influxdb 172.17.0.2
lora-app-server_default 192.168.16.1
- lora-app-server_mosquitto_1
- lora-app-server_postgres_1
- lora-app-server_redis_1
loraserver-docker_default 192.168.64.1
- loraserver-docker_appserver_1
- loraserver-docker_gatewaybridge_1
- loraserver-docker_loraserver_1
- loraserver-docker_geoserver_1
- loraserver-docker_postgresql_1
- loraserver-docker_mosquitto_1
- loraserver-docker_redis_1
In summary, loraserver-docker_appserver_1 influxdb and not in the same network can not communicate.
You can view specific reasons Docker official web tutorial practice custom bridge network .
3 treatment options
Scheme 1 is the host bridge ip ip
influxdb expose the external container has a port 8086, so that the container can be located directly through the host IP and port exposure.
IP is the IP host bridge, i.e. Docker0 IP address, refer to:
https://nickjanetakis.com/blog/docker-tip-65-get-your-docker-hosts-ip-address-from-in-a -container
# ip a
3: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
link/ether 02:42:5f:e8:7c:be brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
valid_lft forever preferred_lft forever
Therefore, we can locate the influxdb container through 172.17.0.1:8086. We can configure InfluxDB integration API endpoint in chirpstack webui in:
http://172.17.0.1:8086/write
Scheme 2 will be connected to the same network influxdb container
# docker network connect loraserver-docker_default influxdb
# docker network inspect loraserver-docker_default
[
{
"Name": "loraserver-docker_default",
"Id": "d4389dfb8f38d6a023de63ca25d74c65a5b4b114fbb83a1b43263e376000a22b",
"Created": "2020-02-05T14:23:44.985567025+08:00",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "192.168.64.0/20",
"Gateway": "192.168.64.1"
}
]
},
"Internal": false,
"Attachable": true,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"0329aa3dbabb76ab7d94cd19ff0ff89a8c48cc45d710b8060800a177dc2dd214": {
"Name": "loraserver-docker_appserver_1",
"EndpointID": "1080f620260de45592ac7c824f2e7a2f68846de5764e2734cd2f0745718c326a",
"MacAddress": "02:42:c0:a8:40:07",
"IPv4Address": "192.168.64.7/20",
"IPv6Address": ""
},
"0d8afb7896f6d5ad7516c8079b2b38f6c88f2beac13ccb887273f62cd2d10538": {
"Name": "loraserver-docker_geoserver_1",
"EndpointID": "4775a6fb238a594972d8fbac20175537dc4fd83572051283484522777f42ecc5",
"MacAddress": "02:42:c0:a8:40:04",
"IPv4Address": "192.168.64.4/20",
"IPv6Address": ""
},
"4bb2a05b99aa24a524137bbc4df3bd7e19bc8e45edd558c3bfda1d0530fc5c0b": {
"Name": "loraserver-docker_postgresql_1",
"EndpointID": "8e5e035a17bca1b957dc9c2d00ef385118407ad04bff87da3ca2009bfe7eeee5",
"MacAddress": "02:42:c0:a8:40:06",
"IPv4Address": "192.168.64.6/20",
"IPv6Address": ""
},
"5e5813773f6dbc0af8136e234df9f6fd9658488fcafdf57dfdafd57cb9198c76": {
"Name": "loraserver-docker_gatewaybridge_1",
"EndpointID": "9e1956f9ed7f5cd4ca1009788a811ec243428ca4b0787b621f402b06c827375b",
"MacAddress": "02:42:c0:a8:40:08",
"IPv4Address": "192.168.64.8/20",
"IPv6Address": ""
},
"98b72943ab195564fb1a8465243bff96cbc7dc989a3a16dab5269afc835336f5": {
"Name": "influxdb",
"EndpointID": "b89b8104bcf27a29bc3a7b470206a4669e5513b37d09e888ab970425299a807c",
"MacAddress": "02:42:c0:a8:40:09",
"IPv4Address": "192.168.64.9/20",
"IPv6Address": ""
},
"9b8a1f733e2b3e995eaac5fcdd759ea7f4926943e511f3754c66293e7910ce6e": {
"Name": "loraserver-docker_loraserver_1",
"EndpointID": "ffc5869e673c591776f07d7fc5ab95ab017c9773dd11aa403010c69551b373a0",
"MacAddress": "02:42:c0:a8:40:05",
"IPv4Address": "192.168.64.5/20",
"IPv6Address": ""
},
"c984f4f533bd904469a6afe70224baade7fffa550b345580bfe911e38235581e": {
"Name": "loraserver-docker_redis_1",
"EndpointID": "d7ebab7f77eac0beb71f207b94c7432ab04092c2c5442eeeaa1d87c7783085a1",
"MacAddress": "02:42:c0:a8:40:02",
"IPv4Address": "192.168.64.2/20",
"IPv6Address": ""
},
"cc5400f93f5454ee5033f37a8b8bd584a292429baaa7c9fd16e788bd34200407": {
"Name": "loraserver-docker_mosquitto_1",
"EndpointID": "d47e177c7785d3a0f9c0e70e707bfdfb7cbb056f1b785bfc136a503559d7d929",
"MacAddress": "02:42:c0:a8:40:03",
"IPv4Address": "192.168.64.3/20",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {
"com.docker.compose.network": "default",
"com.docker.compose.project": "loraserver-docker",
"com.docker.compose.version": "1.24.1"
}
}
]
In this way, we can influxdb direct access to the container by container name, it can also be accessed through the container ip 192.168.64.9.
So we can configure InfluxDB integration API endpoint in chirpstack webui in:
http://influxdb:8086/write
or:
http://192.168.64.9:8086/write
4 Summary
One typical problem of this section chirpstack app_server note from the container can not be connected by an external influxdb localhost, analyzes the network chirpstack vessel involved, the problem for a given host bridge ip ip ie, the container can also access the same influxdb vessel networks are two solutions.
END
