Step 2: Manage NebulaGraph Service¶
You can use the nebula.service script to start, stop, restart, terminate, and check the NebulaGraph services. This topic takes starting, stopping and checking the NebulaGraph services for examples.
nebula.service is stored in the /usr/local/nebula/scripts directory by default, which is also the default installation path of NebulaGraph. If you have customized the path, use the actual path in your environment.
Syntax¶
$ sudo /usr/local/nebula/scripts/nebula.service
[-v] [-c <config_file_path>]
<start|stop|restart|kill|status>
<metad|graphd|storaged|all>
| Parameter | Description |
|---|---|
-v |
Display detailed debugging information. |
-c |
Specify the configuration file path. The default path is /usr/local/nebula/etc/. |
start |
Start the target services. |
stop |
Stop the target services. |
restart |
Restart the target services. |
kill |
Terminate the target services. |
status |
Check the status of the target services. |
metad |
Set the Meta Service as the target service. |
graphd |
Set the Graph Service as the target service. |
storaged |
Set the Storage Service as the target service. |
all |
Set all the NebulaGraph services as the target services. |
Start NebulaGraph¶
In non-container environment¶
Run the following command to start NebulaGraph.
$ sudo /usr/local/nebula/scripts/nebula.service start all
[INFO] Starting nebula-metad...
[INFO] Done
[INFO] Starting nebula-graphd...
[INFO] Done
[INFO] Starting nebula-storaged...
[INFO] Done
In docker container (deployed with docker-compose)¶
Run the following command in the nebula-docker-compose/ directory to start NebulaGraph.
[nebula-docker-compose]$ docker-compose up -d
Building with native build. Learn about native build in Compose here: https://docs.docker.com/go/compose-native-build/
Creating network "nebula-docker-compose_nebula-net" with the default driver
Creating nebula-docker-compose_metad0_1 ... done
Creating nebula-docker-compose_metad2_1 ... done
Creating nebula-docker-compose_metad1_1 ... done
Creating nebula-docker-compose_storaged2_1 ... done
Creating nebula-docker-compose_graphd1_1 ... done
Creating nebula-docker-compose_storaged1_1 ... done
Creating nebula-docker-compose_storaged0_1 ... done
Creating nebula-docker-compose_graphd2_1 ... done
Creating nebula-docker-compose_graphd_1 ... done
Stop NebulaGraph¶
Danger
Do not run kill -9 to forcibly terminate the processes. Otherwise, there is a low probability of data loss.
In non-container environment¶
Run the following command to stop NebulaGraph.
$ sudo /usr/local/nebula/scripts/nebula.service stop all
[INFO] Stopping nebula-metad...
[INFO] Done
[INFO] Stopping nebula-graphd...
[INFO] Done
[INFO] Stopping nebula-storaged...
[INFO] Done
In docker container (deployed with docker-compose)¶
Run the following command in the nebula-docker-compose/ directory to stop NebulaGraph.
nebula-docker-compose]$ docker-compose down
Stopping nebula-docker-compose_graphd_1 ... done
Stopping nebula-docker-compose_graphd2_1 ... done
Stopping nebula-docker-compose_storaged0_1 ... done
Stopping nebula-docker-compose_storaged1_1 ... done
Stopping nebula-docker-compose_graphd1_1 ... done
Stopping nebula-docker-compose_storaged2_1 ... done
Stopping nebula-docker-compose_metad1_1 ... done
Stopping nebula-docker-compose_metad2_1 ... done
Stopping nebula-docker-compose_metad0_1 ... done
Removing nebula-docker-compose_graphd_1 ... done
Removing nebula-docker-compose_graphd2_1 ... done
Removing nebula-docker-compose_storaged0_1 ... done
Removing nebula-docker-compose_storaged1_1 ... done
Removing nebula-docker-compose_graphd1_1 ... done
Removing nebula-docker-compose_storaged2_1 ... done
Removing nebula-docker-compose_metad1_1 ... done
Removing nebula-docker-compose_metad2_1 ... done
Removing nebula-docker-compose_metad0_1 ... done
Removing network nebula-docker-compose_nebula-net
Note
If you are using a developing or nightly version for testing and have compatibility issues, try to run docker-compose down -v to DELETE all data stored in NebulaGraph and import data again.
Check the service status¶
In non-container environment¶
Run the following command to check the service status of NebulaGraph.
$ sudo /usr/local/nebula/scripts/nebula.service status all
-
NebulaGraph is running normally if the following information is returned.
[INFO] nebula-metad(02b2091): Running as 26601, Listening on 9559 [INFO] nebula-graphd(02b2091): Running as 26644, Listening on 9669 [INFO] nebula-storaged(02b2091): Running as 26709, Listening on 9779Note
After starting NebulaGraph, the port of the
nebula-storagedprocess is shown in red. Because thenebula-storagedprocess waits for thenebula-metadto add the current Storage service during the startup process. The Storage works after it receives the ready signal. Starting from NebulaGraph 3.0.0, the Meta service cannot directly read or write data in the Storage service that you add in the configuration file. The configuration file only registers the Storage service to the Meta service. You must run theADD HOSTScommand to enable the Meta to read and write data in the Storage service. For more information, see Manage Storage hosts.
- If the returned result is similar to the following one, there is a problem. You may also go to the NebulaGraph community for help.
[INFO] nebula-metad: Running as 25600, Listening on 9559 [INFO] nebula-graphd: Exited [INFO] nebula-storaged: Running as 25646, Listening on 9779
The NebulaGraph services consist of the Meta Service, Graph Service, and Storage Service. The configuration files for all three services are stored in the /usr/local/nebula/etc/ directory by default. You can check the configuration files according to the returned result to troubleshoot problems.
In docker container (deployed with docker-compose)¶
Run the following command in the nebula-docker-compose/ directory to check the service status of NebulaGraph.
nebula-docker-compose]$ docker-compose ps
Name Command State Ports
---------------------------------------------------------------------------------------------------------------------------------------------------------------------
nebula-docker-compose_graphd1_1 /usr/local/nebula/bin/nebu ... Up (healthy) 0.0.0.0:49223->19669/tcp, 0.0.0.0:49222->19670/tcp, 0.0.0.0:49224->9669/tcp
nebula-docker-compose_graphd2_1 /usr/local/nebula/bin/nebu ... Up (healthy) 0.0.0.0:49229->19669/tcp, 0.0.0.0:49228->19670/tcp, 0.0.0.0:49230->9669/tcp
nebula-docker-compose_graphd_1 /usr/local/nebula/bin/nebu ... Up (healthy) 0.0.0.0:49221->19669/tcp, 0.0.0.0:49220->19670/tcp, 0.0.0.0:9669->9669/tcp
nebula-docker-compose_metad0_1 ./bin/nebula-metad --flagf ... Up (healthy) 0.0.0.0:49212->19559/tcp, 0.0.0.0:49211->19560/tcp, 0.0.0.0:49213->9559/tcp,
9560/tcp
nebula-docker-compose_metad1_1 ./bin/nebula-metad --flagf ... Up (healthy) 0.0.0.0:49209->19559/tcp, 0.0.0.0:49208->19560/tcp, 0.0.0.0:49210->9559/tcp,
9560/tcp
nebula-docker-compose_metad2_1 ./bin/nebula-metad --flagf ... Up (healthy) 0.0.0.0:49206->19559/tcp, 0.0.0.0:49205->19560/tcp, 0.0.0.0:49207->9559/tcp,
9560/tcp
nebula-docker-compose_storaged0_1 ./bin/nebula-storaged --fl ... Up (healthy) 0.0.0.0:49218->19779/tcp, 0.0.0.0:49217->19780/tcp, 9777/tcp, 9778/tcp,
0.0.0.0:49219->9779/tcp, 9780/tcp
nebula-docker-compose_storaged1_1 ./bin/nebula-storaged --fl ... Up (healthy) 0.0.0.0:49215->19779/tcp, 0.0.0.0:49214->19780/tcp, 9777/tcp, 9778/tcp,
0.0.0.0:49216->9779/tcp, 9780/tcp
nebula-docker-compose_storaged2_1 ./bin/nebula-storaged --fl ... Up (healthy) 0.0.0.0:49226->19779/tcp, 0.0.0.0:49225->19780/tcp, 9777/tcp, 9778/tcp,
0.0.0.0:49227->9779/tcp, 9780/tcp
If the service is abnormal, you can first confirm the abnormal container name (such as nebula-docker-compose_graphd2_1).
Then you can execute docker ps to view the corresponding CONTAINER ID (such as 2a6c56c405f5).
[nebula-docker-compose]$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2a6c56c405f5 vesoft/nebula-graphd:nightly "/usr/local/nebula/b…" 36 minutes ago Up 36 minutes (healthy) 0.0.0.0:49230->9669/tcp, 0.0.0.0:49229->19669/tcp, 0.0.0.0:49228->19670/tcp nebula-docker-compose_graphd2_1
7042e0a8e83d vesoft/nebula-storaged:nightly "./bin/nebula-storag…" 36 minutes ago Up 36 minutes (healthy) 9777-9778/tcp, 9780/tcp, 0.0.0.0:49227->9779/tcp, 0.0.0.0:49226->19779/tcp, 0.0.0.0:49225->19780/tcp nebula-docker-compose_storaged2_1
18e3ea63ad65 vesoft/nebula-storaged:nightly "./bin/nebula-storag…" 36 minutes ago Up 36 minutes (healthy) 9777-9778/tcp, 9780/tcp, 0.0.0.0:49219->9779/tcp, 0.0.0.0:49218->19779/tcp, 0.0.0.0:49217->19780/tcp nebula-docker-compose_storaged0_1
4dcabfe8677a vesoft/nebula-graphd:nightly "/usr/local/nebula/b…" 36 minutes ago Up 36 minutes (healthy) 0.0.0.0:49224->9669/tcp, 0.0.0.0:49223->19669/tcp, 0.0.0.0:49222->19670/tcp nebula-docker-compose_graphd1_1
a74054c6ae25 vesoft/nebula-graphd:nightly "/usr/local/nebula/b…" 36 minutes ago Up 36 minutes (healthy) 0.0.0.0:9669->9669/tcp, 0.0.0.0:49221->19669/tcp, 0.0.0.0:49220->19670/tcp nebula-docker-compose_graphd_1
880025a3858c vesoft/nebula-storaged:nightly "./bin/nebula-storag…" 36 minutes ago Up 36 minutes (healthy) 9777-9778/tcp, 9780/tcp, 0.0.0.0:49216->9779/tcp, 0.0.0.0:49215->19779/tcp, 0.0.0.0:49214->19780/tcp nebula-docker-compose_storaged1_1
45736a32a23a vesoft/nebula-metad:nightly "./bin/nebula-metad …" 36 minutes ago Up 36 minutes (healthy) 9560/tcp, 0.0.0.0:49213->9559/tcp, 0.0.0.0:49212->19559/tcp, 0.0.0.0:49211->19560/tcp nebula-docker-compose_metad0_1
3b2c90eb073e vesoft/nebula-metad:nightly "./bin/nebula-metad …" 36 minutes ago Up 36 minutes (healthy) 9560/tcp, 0.0.0.0:49207->9559/tcp, 0.0.0.0:49206->19559/tcp, 0.0.0.0:49205->19560/tcp nebula-docker-compose_metad2_1
7bb31b7a5b3f vesoft/nebula-metad:nightly "./bin/nebula-metad …" 36 minutes ago Up 36 minutes (healthy) 9560/tcp, 0.0.0.0:49210->9559/tcp, 0.0.0.0:49209->19559/tcp, 0.0.0.0:49208->19560/tcp nebula-docker-compose_metad1_1
Use the CONTAINER ID to log in the container and troubleshoot.
nebula-docker-compose]$ docker exec -it 2a6c56c405f5 bash
[root@2a6c56c405f5 nebula]#