I successfully deployed a couchdb cartridge to wso2stratos and member get activated successfully. For the implementation of the dockerfile i used this git code. which include the below line that i have no idea why it is there! Can someone explain the below code?
RUN printf "[httpd]\nport = 8101\nbind_address = 0.0.0.0" > /usr/local/etc/couchdb/local.d/docker.ini
EXPOSE 8101
CMD ["/usr/local/bin/couchdb"]
I tried pointing http://127.0.0.1:5984/_utils/spec/run.html url and its working perfectly.
I just SSH to the docker container and start the couchdb,
root#instance-00000001:/usr/local/etc/couchdb/local.d# couchdb couchdb
Apache CouchDB 1.6.1 (LogLevel=info) is starting.
Apache CouchDB has started. Time to relax.
[info] [<0.32.0>] Apache CouchDB has started on http://0.0.0.0:8101/
Then I try to pointing the browser to http://0.0.0.0:8101/ and http://127.0.0.1:5984/_utils/index.html both of them not working.
Can someone tell me why i can't view my databases and create database window?
For your first question about what those lines do:
# Set port and address for couchdb to bind too.
# Remember these are addresses inside the container
# and not necessarily publicly available.
# See http://docs.couchdb.org/en/latest/config/http.html
RUN printf "[httpd]\nport = 8101\nbind_address = 0.0.0.0" >
/usr/local/etc/couchdb/local.d/docker.ini
# Tell docker that this port needs to be exposed.
# You still need to run -P when running container
EXPOSE 8101
# This is the command which is run automatically when container is run
CMD ["/usr/local/bin/couchdb"]
As for why you cannot access it, What does your docker run command look like, did you expose the port? i.e.
docker run -p 8101:8101 ....
Are you by any chance testing on OSX? If so try http://192.168.59.103:8101/ On OSX docker would be inside a virtual box VM as docker cannot run natively on OSX. The IP of the virtual machine can be looked up using boot2docker ip and is normally 192.168.59.103.
Related
I'm a freshmen focusing on Database Management System, and I'm using Docker on Windows 10(Newest version), and I use this website https://hub.docker.com/r/cloudera/quickstart/ to run a cloudera quick-start container, just printing this code in Powershell(After pulling the image):
docker run --hostname=quickstart.cloudera --privileged=true -t -i -p 8888 4239cd2958c6 /usr/bin/docker-quickstart
But the container will exit quickly after I run, and I can also get no log( Using docker log <name>), no port assigned by docker. And it seems most services(related to the Cloudera Quickstart) are not started, either.
Some pictures here:
All containers, and the first one is the cloudera,but with no port assigned.
There should have been a port like this.
Because the final purpose is to access to Hue interface based on the port, so I do believe I'm in a trouble. And I do need someone's help. Thanks a lot.
P.S. Changing -p 8888:8888 or other port number is useless.
Now I have two Linux PC,mongodb is in the first PC which IP is 192.168.1.33,and a
java application on another Linux connect to the mongodb on 192.168.1.33
What I want to do is,prepare everything and make both Linux systems into docker images,and when I am in productive environment,I can simply restore the images that I prepared,and everything is OK,so I do not need complex deployment steps.
but the problem is,the IP of mongodb will change,and the IP 192.168.1.33 is written in my configuration file of my java application,it will not change automatically,is there a automated way?
Basics
We create Docker-file with minimal installation steps.
We create docker-Image from that Docker-file in step-1.
We create container from the step-2 image and expose the important port as required.
For your problem.
creating-a-docker-image-with-mongodb This article will help to dockerize the mongodb.
but the problem is,the IP of mongodb will change,and the IP
192.168.1.33 is written in my configuration file of my java application,it
will not change automatically,is there a automated way?
If you expose the mongo-db port to docker host you can use same
docker-host-IP:<exposed-port>
Ref from the article sudo docker run -p 27017:27017 -i -t my_new_mongodb
Example: 192.168.1.33 is your docker-host where mongodb container is running with exposed port 27017. You can add 192.168.1.33:27017 to your JAVA app.
What I want to do is,prepare everything and make both Linux systems
into docker images
You can not convert your VM to direct docker images. Instead you can follow the steps written in Basics and dockerize the both DB and application layer.
2.dockerize-your-java-application refer this link and dockerize you application based on requirements.
Step 1 & 2 will help you to build docker images which you can deploy to multiple servers.
I have a NodeJS/Vue app that I can run fine until I try to put it in a Docker container. I am using project structure like:
When I do npm run dev I get the output:
listmymeds#1.0.0 dev /Users/.../projects/myproject
webpack-dev-server --inline --progress --config build/webpack.dev.conf.js
and then it builds many modules before giving me the message:
DONE Compiled successfully in 8119ms
I Your application is running here: http://localhost:8080
then I am able to connect via browser at localhost:8080
Here is my Dockerfile:
FROM node:9.11.2-alpine
RUN mkdir -p /app
WORKDIR /app
COPY package.json /app
RUN npm install
COPY . /app
CMD npm run dev
EXPOSE 8080
I then create a docker image with docker build -t myproject . and see the image listed via docker images
I then run docker run -p 8080:8080 myproject and get a message that my application is running here: localhost:8080
However, when I either use a browser or Postman to GET localhost:8080 there is no response.
Also, when I run the container from the command line, it appears to lock up so I have to close the terminal. Not sure if that is related or not though...
UPDATE:
I trying following the Docker logs such as
docker logs --follow
and there is nothing other than the last line that my application is running on localhost:8080
This would seem to indicate that my http requests are never making into my container right?
I also tried the suggestion to
CMD node_modules/.bin/webpack-dev-server --host 0.0.0.0
but that failed to even start.
It occurred to me that perhaps there is a Docker network issue, perhaps resulting in an earlier attempt at kong api learning. So I run docker network ls and see
NETWORK ID NAME DRIVER SCOPE
1f11e97987db bridge bridge local
73e3a7ce36eb host host local
423ab7feaa3c none null local
I have been unable to stop, disconnect or remove any of these networks. I think the 'bridge' might be one Kong created, but it won't let me whack it. There are no other containers running, and I have deleted all images other than the one I am using here.
Answer
It turns out that I had this in my config/index.js:
module.exports = {
dev: {
// Various Dev Server settings
host: 'localhost',
port: 8080,
Per Joachim Schirrmacher excellent help, I changed host from localhost to 0.0.0.0 and that allowed the container to receive the requests from the host.
With a plain vanilla express.js setup this works as expected. So, it must have something to do with your Vue application.
Try the following steps to find the source of the problem:
Check if the container is started or if it exits immediately (docker ps)
If the container runs, check if the port mapping is set up correctly. It needs to be 0.0.0.0:8080->8080/tcp
Check the logs of the container (docker logs <container_name>)
Connect to the container (docker exec -it <container_name> sh) and check if node_modules exists and contains all
EDIT
Seeing your last change of your question, I recommend starting the container with the -dit options: docker run -dit -p 8080:8080 myproject to make it go to the background, so that you don't need to hard-stop it by closing the terminal.
Make sure that only one container of your image runs by inspecting docker ps.
EDIT2
After discussing the problem in chat, we found that in the Vue.js configuration there was a restriction to 'localhost'. After changing it to '0.0.0.0', connections from the container's host system are accepted as well.
With Docker version 18.03 and above it is also possible to set the host to 'host.docker.internal' to prevent connections other than from the host system.
I'm trying to work on a dev environment with Node.js and Docker.
I want to be able to:
run my docker container when I boot my computer once and for all;
make changes in my local source code and see the changes without interacting with the docker container (with a mount).
I've tried the Node image and, if I understand correctly, it is not what I'm looking for.
I know how to make the mount point, but I'm missing how the server is supposed to detect the changes and "relaunch" itself.
I'm new to Node.js so if there is a better way to do things, feel free to share.
run my docker container when I boot my computer once and for all;
start containers automatically with the docker daemon or with your process manager
make changes in my local source code and see the changes without
interacting with the docker container (with a mount).
You need to mount your dev app folder as a volume
$ docker run --name myapp -v /app/src:/app image/app
and set in your Dockerfile nodeJs
CMD ["nodemon", "-L", "/app"]
Apologies for asking two unrelated questions.
what is the best way of accessing the host machine of the docker container (i.e. I am trying to access a kafka instance running on the host, from my docker container so that I can publish some messages)
when I run docker run ..... on an image which I've modified that may have an issue/syntax error, it will naturally not start - is there a log file anywhere that I would be able to take a look at to debug the issue. (this question is somewhat related to the 1st question, since I did what was suggested on another post, but the image is still not starting)
This is an ongoing discussion on what to use and what not, I don't really know what is best. Using the docker run --net="host" is pretty easy but can be dangerous. See From inside of a Docker container, how do I connect to the localhost of the machine?.
Use docker logs containerid or lookup the raw data in /var/lib/docker/containers/containerid/ for Ubuntu.
You should have no problem connecting to the host using the local lan interface ip address. Suppose you have a host with ip 192.168.0.1:
docker run --rm -ti ubuntu bash
ping 192.168.0.1
should give you a response.
You can use docker logs to see the standard output of your container.