docker 3

DockerSwarm/Intro-Cloud.adoc

@@ -1,4 +1,4 @@
-= Εισαγωγή στο Cloud !
+= Cloud !
 Apostolos rootApostolos@swarmlab.io
 // Metadata:
 :description: IoT  Εισαγωγή στο Cloud
@@ -197,7 +197,7 @@ This command is used to display all the images currently installed on the system
 
 Docker Hub is a registry service on the cloud that allows you to download Docker images that are built by other communities. You can also upload your own Docker built images to Docker hub.
 
-To run apache, you need to run the following command −
+To run apache, you need to run the following command:
 
 .run docker image from Docker Hub
 [source,sh]
@@ -300,7 +300,74 @@ Options
     ContainerID − This is the Container ID which needs to be removed.
 ----
 
+==== Container Logging
 
+Logging is also available at the container level.
+
+.docker log
+[source,sh]
+----
+Docker logs containerID 
+
+Parameters
+
+    containerID − This is the ID of the container for which you need to see the logs.
+----
+
+=== Volumes
+
+Volumes are the preferred mechanism for persisting data generated by and used by Docker containers.
+
+.docker volumes
+[source,sh]
+----
+docker run -d --name mycontainer -v /var/www/html:/var/html nginx:latest
+----
+
+
+=== repositories
+
+You might have the need to have your own private repositories. You may not want to host the repositories on Docker Hub. For this, there is a repository container itself from Docker. Let’s see how we can download and use the container for registry.
+
+
+=== Create 
+
+.docker registry
+[source,sh]
+----
+docker run –d –p 5000:5000 –-name registry registry:2
+
+The following points need to be noted about the above command:
+
+    Registry is the container managed by Docker which can be used to host private repositories.
+
+    The port number exposed by the container is 5000. Hence with the –p command, we are mapping the same port number to the 5000 port number on our localhost.
+
+    We are just tagging the registry container as “2”, to differentiate it on the Docker host.
+
+    The –d option is used to run the container in detached mode. This is so that the container can run in the background
+----
+
+
+=== Push
+
+use the Docker push command to push the image to our private repository.
+
+.docker registry
+[source,sh]
+----
+docker push localhost:5000/myimage
+----
+
+=== Pull
+
+use the following Docker pull command to pull image from our private repository.
+
+.docker registry
+[source,sh]
+----
+docker pull localhost:5000/myimage
+----