containers

问题 i have two separate containers having docker images where one is running the REST application and the other one is running the process for downloading satellite images. My aim is that when i click on the download button after passing the query with defined parameters in my main application, it should start the container for download and once downloaded, it should stop the container .Currently i am able to run the container for download independently by providing all the necessary environment

问题 I would like to track a session across multiple web applications, multiple microservices. All of my web applications are static files and microservices are running under nodejs containers with Kubernetes. I have tracking setup across separate web applications and separate microservices. But it too cumbersome to merge and view everything in a single view. Is there any approach to view all of them under single session? 回答1: Kubernetes itself do not support any request tracing, but you can use

问题 What would have better performance, a stl vector, or a dynamic array that's just realloc'd everytime I want to add something to it? Would using vectors::iterator be faster then using a for loop on an array? And if someone could explain why, that would be great. 回答1: What would have better performance, a stl vector, or a dynamic array that's just realloc'd everytime I want to add something to it? Stl vectors have insertion in amortized constant time (because reallocation is not done all the

问题 I have the following simple implementation of a Heterogeneous container: struct Container { struct HolderBase { }; template<typename S> struct Holder : HolderBase { Holder(S* s) : s_(s) {} S* s_; }; template<typename S> void push_back(S* s) { h_.push_back(new Holder<S>(s)); } vector<HolderBase*> h_; template<typename B> B* get(int i) { //magic here } }; Here's how to use it: struct ElementBase {}; struct Element : ElementBase {}; int main() { Container container; container.push_back(new

问题 When a Dockerfile contains VOLUME instruction (say) VOLUME [/opt/apache2/www, ...] (hope this path exists in real installation), it means this path is going to be mounted to something (right?). And this VOLUME instruction is for the image and not for one instance of it (container) but for every instance. Anyway irrespective of whether an image contains a VOLUME defined or not, at the time of starting a container the run command can create a volume by mapping a local host path to a container

问题 I need to store large number of integers. There can be duplicates in the input stream of integers, I just need to store distinct amongst them. I was using stl set initially but It went OutOfMem when input number of integers went too high. I am looking for some C++ container library which would allow me to store numbers with the said requirement possibly backed by file i.e container should not try to keep all numbers in-mem. I don't need to store this data persistently, I just need to find

问题 I have successfully deployed a mesos cluster on azure container service using article deploy an container service cluster. I used azure cli on OS X for creating the cluster. As part of the process I created a new ssh key pair: ssh-keygen -t rsa -b 2048 After deployment went successful I'm trying to ssh into the end point but receiving "Permission Denied (Public Key)" ssh -L 80:localhost:80 -N azureuser@xyz.eastus2.cloudapp.azure.com -p 2200 -v The verbose [not all but last few lines] debug1:

问题 I'm having some trouble in declaring a STL Set of pointers to class instances. More specifically, I have this scenario: class SimulatedDiskFile { private: // ... public: // ... struct comparator { bool operator () (SimulatedDiskFile* const& file_1, SimulatedDiskFile* const& file_2) { return ((*file_1)->getFileName() < (*file_2)->getFileName()); } }; } typedef set<SimulatedDiskFile*, SimulatedDiskFile::comparator> FileSet; The code above is not working. Compiler says it didn't find a member

问题 I have code in which there are many objects, where each is referenced by its own numeric ID/pointer. I wish to store these objects in some sort of structure where I can reference the objects from the structure using their numeric ID. However, the IDs are not sequential, and I don't want to allocate space for all of the non-existent IDs. This rules out simply creating an object array. I'm currently using the containers.Map class which stores values/objects with lookup keys, but it's rather

问题 I'm using Spark in a YARN cluster (HDP 2.4) with the following settings: 1 Masternode 64 GB RAM (48 GB usable) 12 cores (8 cores usable) 5 Slavenodes 64 GB RAM (48 GB usable) each 12 cores (8 cores usable) each YARN settings memory of all containers (of one host): 48 GB minimum container size = maximum container size = 6 GB vcores in cluster = 40 (5 x 8 cores of workers) minimum #vcores/container = maximum #vcores/container = 1 When I run my spark application with the command spark-submit -