containers

问题 I'm planning to use Docker to deploy a node.js app. The app has several dependencies that require node-gyp. Node-gyp builds these modules (e.g. canvas, lwip, qrcode) against compiled libraries on the delivery platform, and in my experience these builds can be highly dependent on the o/s version and libraries installed, and they often break a simple npm install . So is building my Dockerfile FROM node:version the correct approach? This seems to be the approach shown in every Docker/Node

问题 I'm planning to use Docker to deploy a node.js app. The app has several dependencies that require node-gyp. Node-gyp builds these modules (e.g. canvas, lwip, qrcode) against compiled libraries on the delivery platform, and in my experience these builds can be highly dependent on the o/s version and libraries installed, and they often break a simple npm install . So is building my Dockerfile FROM node:version the correct approach? This seems to be the approach shown in every Docker/Node

问题 As constexpr std::string and constexpr std::vector have been accepted into C++20, how will these be used? The linked papers are very short on details. Do we need to specify special constexpr allocators, making compile-time strings/vectors incompatible with their normal equivalents? 回答1: Those two papers depend heavily on P0784, which discusses how allocations at compile-time will work. Incomplete answer: Only std::allocator will work. All allocations are tracked, and must be deallocated

问题 As constexpr std::string and constexpr std::vector have been accepted into C++20, how will these be used? The linked papers are very short on details. Do we need to specify special constexpr allocators, making compile-time strings/vectors incompatible with their normal equivalents? 回答1: Those two papers depend heavily on P0784, which discusses how allocations at compile-time will work. Incomplete answer: Only std::allocator will work. All allocations are tracked, and must be deallocated

问题 As constexpr std::string and constexpr std::vector have been accepted into C++20, how will these be used? The linked papers are very short on details. Do we need to specify special constexpr allocators, making compile-time strings/vectors incompatible with their normal equivalents? 回答1: Those two papers depend heavily on P0784, which discusses how allocations at compile-time will work. Incomplete answer: Only std::allocator will work. All allocations are tracked, and must be deallocated

问题 As constexpr std::string and constexpr std::vector have been accepted into C++20, how will these be used? The linked papers are very short on details. Do we need to specify special constexpr allocators, making compile-time strings/vectors incompatible with their normal equivalents? 回答1: Those two papers depend heavily on P0784, which discusses how allocations at compile-time will work. Incomplete answer: Only std::allocator will work. All allocations are tracked, and must be deallocated

问题 Is it possible to add a capability (for ex: NET_ADMIN) after the container has actually started? I started a container few days ago and a service provided by it is being used by several other processes which are running remotely on other servers. I need to add a loopback interface to it, but unfortunately, I forgot to start the container with --cap-add=NET_ADMIN and hence couldn't add the interface now. I'm looking for an option, if it is possible to give this capability somehow to this

问题 Is it possible to add a capability (for ex: NET_ADMIN) after the container has actually started? I started a container few days ago and a service provided by it is being used by several other processes which are running remotely on other servers. I need to add a loopback interface to it, but unfortunately, I forgot to start the container with --cap-add=NET_ADMIN and hence couldn't add the interface now. I'm looking for an option, if it is possible to give this capability somehow to this

问题 I am working inside a container. I want to try gtest so first I installed it by doing this inside the container: Download the source file from github/google/googletest build the project by cmake CMakeLists.txt call make cd lib and cp * /usr/lib cd googlemock/include and cp -r gmock /usr/local/include cd googletest/include and cp -r gtest /usr/local/include After this I created a CMakeLists.txt file as cmake_minimum_required(VERSION 3.13) set(CMAKE_CXX_STANDARD 11) find_package(GTest REQUIRED)

问题 I am working inside a container. I want to try gtest so first I installed it by doing this inside the container: Download the source file from github/google/googletest build the project by cmake CMakeLists.txt call make cd lib and cp * /usr/lib cd googlemock/include and cp -r gmock /usr/local/include cd googletest/include and cp -r gtest /usr/local/include After this I created a CMakeLists.txt file as cmake_minimum_required(VERSION 3.13) set(CMAKE_CXX_STANDARD 11) find_package(GTest REQUIRED)