I'm trying to expose a nodejs application that runs under a docker
docker run -p 3005:3005 -p 5858:5858 -i -t -v /usuarios centos-nodejs:1.0 /bin/bash
after that command, I access my application
cd usuarios
node index
and then the application is running inside the docker container.
How can I expose a port to access in my browser something like localhost:5858/my_api_here
It seems a nodejs application is bound to localhost:5858 only inside a container. That's why you cannot access it via 127.0.0.1:5858 from the host. You need to find a way to bind it to 0.0.0.0:5858. After that you can access it on 127.0.0.1:5858 from the host.
Following the command below, it works
docker run -p 3005:3005 -p 5858:5858 -i -t -v C:\Users\lgermano\Documents
\Repositorios:/opt/rede/workspace centos-nodejs:1.0 /bin/bash
Related
I installed and run nginx on my linux machine to understand the configurations etc. After a while i decided to remove it safely by following this thread in order to use it in docker
By following this documentaion i run this command
sudo docker run --name ngix -d -p 8080:80 pillalexakis/myrestapi:01
And i saw ngix's homepage at localhost
Then i deleted all ngix images & stopped all containers and i also run this command
sudo docker system prune -a
But now restarted my service by this command
sudo docker run -p 192.168.2.9:7777:8085 phillalexakis/myfirstapi:01 and i keep seeing at localhost ngix index.html
How can i totally remove it ?
Note: I'm new with docker and i might have missed a lot of things. Let me know what extra docker commands should i run in order provide better information.
Assuming your host have been preparing as below
your files (index.html, js, etc) under folder - /myhost/nginx/html
your nginx configuration - /myhost/nginx/nginx.conf
Solution
map your files (call volume) on the fly from outside docker image via docker cli
This is the command
docker run -it --rm -d -p 8080:80 --name web \
-v /myhost/nginx/html:/usr/share/nginx/html \
-v /myhost/nginx/nginx.conf:/etc/nginx/nginx.conf \
nginx
copy your files into docker image by build your own docker image via Dockerfile
This is your Dockerfile under /myhost/nginx
FROM nginx:latest
COPY ./html/index.html /usr/share/nginx/html/index.html
This is the command to build your docker image
cd /myhost/nginx
docker build -t pillalexakis/nginx .
This is the command to run your docker image
docker run -it --rm -d -p 8080:80 --name web \
pillalexakis/nginx
I have a DropWizard application which I'm trying to run inside a Docker.
I'm using the following command.
docker run -v `pwd`:/app -t --expose 8080 -p 8080:8080 openjdk bash -c "cd app && java -jar build/libs/app.jar server infrastructure/config/config.yml"
but when I navigate to http://localhost:8080/swagger/ui I get a localhost refused to connect. error.
But if I used the following command to go inside the docker first and then run the dropwizard application from there and then wget from inside the application, I can see the application is really running. But i still can't access it from outside the Docker.
docker run -i -v `pwd`:/app -t --expose 8080 -p 8080:8080 openjdk bash
then
root#06a1c2648236:/# cd app && java -jar build/libs/app.jar server infrastructure/config/config.yml &
then
wget localhost:8080
This means the application is running in the container, but I can't access it outside from the container.
I've used docker to install couchbase on my ubuntu machine using (https://hub.docker.com/r/couchbase/server/). The docker run query is as follows:
docker run -d --name db -p 8091-8094:8091-8094 -p 11210:11210 -v /home/dockercontent/couchbase:/opt/couchbase/var couchbase
Everything works perfectly fine. My application connects, I'm able to insert/update and query the couchbase. Now, I'm looking to debug a situation wherein the couchbase is on my co-developers machine who also has the same installation i.e., couchbase on docker using the above link. For achieving this, I wanted to run cbbackup on his installation. To achieve this, I run the following command which is a variation of the above link:
bash -c "clear && docker exec -it couch-db sh"
Can anyone please help me with the location of /opt/couchbase/bin in this setup? I believe this is where I can get access to "cbbackup", "cbrestore" and "cbtransfer" which I can then use to backup and restore data from my colleague's machine.
Thanks,
Abhi.
When you run the command
docker run -d --name db -p 8091-8094:8091-8094 -p 11210:11210 -v /home/dockercontent/couchbase:/opt/couchbase/var couchbase
you're pulling a docker image and spawning a docker container.
Please read more about Docker and containerization.
In order to run cbbackup you need to log into your docker container.
Follow these steps:
Retrieve the container-id:
$ docker ps -a
Look for the CONTAINER ID for IMAGE NAME=couchbase
Login to the container using the command:
$ docker exec -it <container-id> bash
Go to the directory : /opt/couchbase/bin using:
$ cd /opt/couchbase/bin
You'll find cbbackup binary in this directory.
I just started using docker and followed following tutorial: https://docs.docker.com/engine/admin/using_supervisord/
FROM ubuntu:14.04
RUN apt-get update && apt-get upgrade
RUN apt-get install -y openssh-server apache2 supervisor
RUN mkdir -p /var/lock/apache2 /var/run/apache2 /var/run/sshd /var/log/supervisor
COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf
EXPOSE 22 80
CMD ["/usr/bin/supervisord"]
and
[supervisord]
nodaemon=true
[program:sshd]
command=/usr/sbin/sshd -D
[program:apache2]
command=/bin/bash -c "source /etc/apache2/envvars && exec /usr/sbin/apache2 -DFOREGROUND"
Build and run:
sudo docker build -t <yourname>/supervisord .
sudo docker run -p 22 -p 80 -t -i <yourname>/supervisord
My question is, when docker runs on my server with IP http://88.xxx.x.xxx/, how can I access the apache localhost running inside the docker container from the browser on my computer? I would like to use a docker container as a web server.
You will have to use port forwarding to be able to access your docker container from the outside world.
From the Docker docs:
By default Docker containers can make connections to the outside world, but the outside world cannot connect to containers.
But if you want containers to accept incoming connections, you will need to provide special options when invoking docker run.
So, what does this mean? You will have to specify a port on your host machine (typically port 80) and forward all connections on that port to the docker container. Since you are running Apache in your docker container you probably want to forward the connection to port 80 on the docker container as well.
This is best done via the -p option for the docker run command.
sudo docker run -p 80:80 -t -i <yourname>/supervisord
The part of the command that says -p 80:80 means that you forward port 80 from the host to port 80 on the container.
When this is set up correctly you can use a browser to surf onto http://88.x.x.x and the connection will be forwarded to the container as intended.
The Docker docs describes the -p option thoroughly. There are a few ways of specifying the flag:
# Maps the provided host_port to the container_port but only
# binds to the specific external interface
-p IP:host_port:container_port
# Maps the provided host_port to the container_port for all
# external interfaces (all IP:s)
-p host_port:container_port
Edit: When this question was originally posted there was no official docker container for the Apache web server. Now, an existing version exists.
The simplest way to get Apache up and running is to use the official Docker container. You can start it by using the following command:
$ docker run -p 80:80 -dit --name my-app -v "$PWD":/usr/local/apache2/htdocs/ httpd:2.4
This way you simply mount a folder on your file system so that it is available in the docker container and your host port is forwarded to the container port as described above.
There is an official image for apache. The image documentation contains instructions in how you can use this official images as a base for a custom image.
To see how it's done take a peek at the Dockerfile used by the official image:
https://github.com/docker-library/httpd/blob/master/2.4/Dockerfile
Example
Ensure files are accessible to root
sudo chown -R root:root /path/to/html_files
Host these files using official docker image
docker run -d -p 80:80 --name apache -v /path/to/html_files:/usr/local/apache2/htdocs/ httpd:2.4
Files are accessible on port 80.
I am trying to connect to a web app running on tomcat8 in a docker container.
I am able to access it from within the container doing lynx http://localhost:8080/myapp, but when I try to access it from the host I only get HTTP request sent; waiting for response.
I am exposing port 8080 in the Dockerfile, I am using sudo docker inspect mycontainer | grep IPAddress to get the ip address of the container.
The command I am using to run the docker container is this:
sudo docker run -ti --name myapp --link mysql1:mysql1 --link rabbitmq1:rabbitmq1 -e "MYSQL_HOST=mysql1" -e "MYSQL_USER=myuser" -e "MYSQL_PASSWORD=mysqlpassword" -e "MYSQL_USERNAME=mysqlusername" -e "MYSQL_ROOT_PASSWORD=rootpassword" -e "RABBITMQ_SERVER_ADDRESS=rabbitmq1" -e "MY_WEB_ENVIRONMENT_ID=qa" -e "MY_WEB_TENANT_ID=tenant1" -p "8080:8080" -d localhost:5000/myapp:latest
My Dockerfile:
FROM localhost:5000/web_base:latest
MAINTAINER "Me" <me#my_company.com>
#Install mysql client
RUN yum -y install mysql
#Add Run shell script
ADD run.sh /home/ec2-user/run.sh
RUN chmod +x /home/ec2-user/run.sh
EXPOSE 8080
ENTRYPOINT ["/bin/bash"]
CMD ["/home/ec2-user/run.sh"]
My run.sh:
sudo tomcat8 start && sudo tail -f /var/log/tomcat8/catalina.out
Any ideas why I can access it from within the container but not from the host?
Thanks
What does your docker run command look like? You still need to do -p 8080:8080. Expose in the dockerfile only exposes it for linked containers not to the host vm.
I am able to access the tomcat8 server from the host now. The problem was here:
sudo tomcat8 start && sudo tail -f /var/log/tomcat8/catalina.out
Tomcat8 must be started as a service instead:
sudo service tomcat8 start && sudo tail -f /var/log/tomcat8/catalina.out
Hit given command to find IP address of docker-machine
$ docker-machine ls
The output will be like :
NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS
default * virtualbox Running tcp://192.168.99.100:2376 v1.10.3
Now run your application from host machine as : http://192.168.99.100:8080/myapp