containers

问题 During my Docker container build process, I attemptted to install a few packages using apt-get install. However the process failed to complete because the 3 of the 4 packages could not be found. Step 1 : RUN apt-get update && apt-get install -y netcat ca-certificates build-essential libssl-dev ---> Running in 38d22d97ec4a Err http://http.debian.net jessie InRelease Err http://http.debian.net jessie-updates InRelease Err http://security.debian.org jessie/updates InRelease Err http://http

问题 I have multiple services running in my ECS cluster. Each service contains one or more tasks based on CPU utilization or a number of users. I have deployed these containers with EC2 launch type. Now, I want to increase/decrease the number of EC2 instances based on available resources in the cluster. Let's say there are four ECS tasks running in two m5.large instances. Now, if an ECS service increases the number of tasks and there aren't enough resources available in the cluster, how can I spin

问题 I am trying to extend the MATLAB containers.Map class by subclassing it and adding an additional method with 0 outputs, but I encounter the "too many output arguments" error when executing the method. This is not specific to the new method implementation--any additional method that extends containers.Map() with 0 outputs will generate this error. Specifically, the error is encountered when executing, obj = Containers(); obj.testfun(); For the following class definition, classdef Containers <

问题 I was wondering if it is possible to offer Docker images, but not allow any access to the internals of the built containers. Basically, the user of the container images can use the services they provide, but can't dig into any of the code within the containers. Call it a way to obfuscate the source code, but also offer a service (the software) to someone on the basis of the container, instead of offering the software itself. Something like "Container as a Service", but with the main advantage

问题 I have installed mongodb on a docker container together with openssh on ubuntu 14.04. The container is running with ssh but when I ssh into the container I get the following error when trying to start mongod. root@430f9502ba2d:~# service mongod start Rather than invoking init scripts through /etc/init.d, use the service(8) utility, e.g. service mongod start Since the script you are attempting to invoke has been converted to an Upstart job, you may also use the start(8) utility, e.g. start

问题 I'm building an application for secure messaging between multiple clients. In order to achieve that, I encrypt the message with AES, then I encrypt the AES key with the recipients public RSA key, then I send these two components (RSA-encrypted AES key and AES-encrypted message) to the recipient. The whole process works well and without any errors. Now I ran into a problem and I'm wondering what would be the best practice: In order to persist the private and public key of one participent, I

问题 Ok, I have a dependent property defined in a base class and I'm trying to use it inside of the constructor of its derived class but that does not work, the property appears as null. Unity resolves the dependent property AFTER resolving an instance with container.Resolve(); One alternative I have is to add a IUnityContainer parameter to my MyViewModel class constructor and set the ILogger property my self with something like: public MyViewModel(IUnityContainer container) { Logger = container

问题 Both SGI slist and C++11 std::forward_list appear identical to me unless I have missed something; both implement a singly-linked list. I assume there is a difference though as the C++ Standard Commitee didn't adopt the name slist and instead chose a new name, forward_list, when they added the container into the Standard Library for C++0x. 回答1: One major difference is that std::forward_list lacks a size() member function, where as the sgi::slist doesn't. The motivation for this is that an O(N)

问题 I want to store a list of objects in an std::vector , but the objects contain a reference and cannot be assigned to. I can, however, copy-construct the object. The only option I can think of is to use pointers to wrap the objects and reseat the pointers when they need to be assigned, but the syntax for this would significantly reduce readability, especially when using iterators, and I would prefer an alternative. Doesn't work: std::vector<MyObject> myVector; //fill the vector //... myVector[1

问题 I'd like to ask the Java pros here a question about my current study that I am about to do - what are the key contributors to the differences in efficiency of various servlet containers? I need to compare Tomcat/JBoss/Glassfish/Jetty etc. and I need to know what "factors" may affect the results in the most significant way? I am going to write mock applications for that purpose, so any recommendation for a Java feature/framework/library etc. that I might implement there so that I can greatly