启动用户空间代理时出错：listen tcp 0.0.0.0:2049: bind: address already in use

Question

在 Ubuntu 18.04 上，我尝试安装Hyperledger Cello，在安装过程中，我得到：

make[2]: Entering directory '/home/julien/cello'
docker-compose -f bootup/docker-compose-files/docker-compose-nfs.yml up -d --no-recreate
WARNING: Found orphan containers (cello-user-dashboard, cello-operator-dashboard, cello-watchdog, cello-keycloak-server, cello-parse-server, cello-dashboard_rabbitmq, cello-mongo, cello-keycloak-mysql, cello-engine) for this project. If you removed or renamed this service in your compose file, you can run this command with the --remove-orphans flag to clean it up.
Starting cello-nfs ... error

ERROR: for cello-nfs  Cannot start service nfs: driver failed programming external connectivity on endpoint cello-nfs (d1be7a4999731983a12df9f1fb6484c7adf669be7edf01c6d962856ed8a6846f): Error starting userland proxy: listen tcp 0.0.0.0:2049: bind: address already in use

ERROR: for nfs  Cannot start service nfs: driver failed programming external connectivity on endpoint cello-nfs (d1be7a4999731983a12df9f1fb6484c7adf669be7edf01c6d962856ed8a6846f): Error starting userland proxy: listen tcp 0.0.0.0:2049: bind: address already in use
ERROR: Encountered errors while bringing up the project.

当试图找出哪个应用程序正在使用 2049 端口时，我会这样做：

?  cello git:(master) ? sudo netstat -pna | grep 2049
tcp        0      0 0.0.0.0:2049            0.0.0.0:*               LISTEN      -                   
tcp6       0      0 :::2049                 :::*                    LISTEN      -                   
udp        0      0 0.0.0.0:2049            0.0.0.0:*                           -                   
udp6       0      0 :::2049                 :::*                                -                   
unix  3      [ ]         STREAM     CONNECTED     204951   18122/brave --type=  
unix  3      [ ]         STREAM     CONNECTED     204950   5193/brave           

但我没有应用程序名称。

我还尝试删除容器

docker rm -f $(docker ps -aq)

就像在这篇文章中所说的，但它没有用。

我该怎么做才能释放这个端口？

Answer 1

你可以试试 ：

docker stop $(docker ps -a -q)
docker ps # again to make sure containers is off
sudo lsof -i tcp:2049 # now you get and list of process running and using 2049 port find and copy PID
sudo kill -9 yout_PID

现在2049端口被杀死了，然后再次尝试启动容器......

Answer 2

看起来好像您的主机上正在运行 NFS 服务器。当您netstat -p ...以 root 身份运行时，您看不到端口的 PID，如下所示...

tcp        0      0 0.0.0.0:2049            0.0.0.0:*               LISTEN      -                   
tcp6       0      0 :::2049                 :::*                    LISTEN      -                   
udp        0      0 0.0.0.0:2049            0.0.0.0:*                           -                   
udp6       0      0 :::2049                 :::*                                -                   

...这通常意味着有一个内核服务绑定到该端口。禁用内核 NFS 服务器（假设您没有使用它）应该允许您运行容器。