Detailed description of the environment variable process. env in Node. js, node. jsprocess. env
Preface
We have been working with O m gg to deploy the project in the last two days. One problem is our dev, uat, and product environment.
Because it is the frontend and backend separation, the domain name of the backend interface will be switched during development and deployment. After one afternoon, I checked
pseudo-input terminal for the container, which is usually used together with-I;-- Name = "nginx-lb ":? Specify a name for the container;-- DNS 8.8.8.8 :? Specifies the DNS server used by the container, which is consistent with the host by default;-- DNS-search example.com :? Specify the DNS search Domain Name of the container, which is consistent with the host by default;-H "Mars ":? Specify the container hostname;-E username = "Ritchie ":? Set environment variables;--
application container update release, rollback more convenient. All container configuration information can be seen from the interface, making troubleshooting easier.
The Offline people cloud Enterprise component uses the same mirroring and env variables as the line, gets the corresponding version of Envfile and Docker images through the API, and then takes all the profiles out to a profile, and the imp
about 5s.View the list of services againdocker-machine lsNAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORSdefault * virtualbox Running tcp://192.168.99.100:2376 v17.12.1-ceDiscover that a virtual host already existsAfter the host has been created successfully, the ENV command can be used to make the subsequent operation objects a targe
This series of articles will introduce Docker knowledge:
(1) Docker installation and basic usage
(2) Docker mirror
(3) Isolation of Docker containers-use Linux namespace isolate container's operating environment
(4) Isolation of Docker containers-use cgroups to limit the
use:Docker start CONTAINER [CONTAINER ...]Instructions for use:This set of commands can be turned on (two: Start, restart), stop (A: stop) a container.TagHow to use:Docker tag [OPTIONS] image[:tag] [Registryhost/][username/]name[:tag]Instructions for use:The combination uses the user name, image name, and tag name to organize and manage the image.TopHow to use:Docker top CONTAINER [PS OPTIONS]Instructions for use:Displays the processes running inside the container.WaitHow to use:Docker wait CON
that you install Docker Toolbox.
Toolbox's introduction and help: Mirrors.aliyun.com/help/docker-toolbox
Installation files directory for Windows systems: Mirrors.aliyun.com/docker-toolbox/windows
Quick Start
# Create a Linux virtual machine with a Docker environment installed Specifies that the machine name is de
/boot2docker/boot2docker/releases/latest: dial tcp: lookup api.github.com on [::1]:53: server misbehaving(manager1) Copying /home/zuolan/.docker/machine/cache/boot2docker.iso to /home/zuolan/.docker/machine/machines/manager1/boot2docker.iso...(manager1) Creating VirtualBox VM...(manager1) Creating SSH key...(manager1) Starting the VM...(manager1) Check network to re-create if needed...(manager1) Found a new
/boot2docker/boot2docker/releases/latest: dial tcp: lookup api.github.com on [::1]:53: server misbehaving(manager1) Copying /home/zuolan/.docker/machine/cache/boot2docker.iso to /home/zuolan/.docker/machine/machines/manager1/boot2docker.iso...(manager1) Creating VirtualBox VM...(manager1) Creating SSH key...(manager1) Starting the VM...(manager1) Check network to re-create if needed...(manager1) Found a new
/to/workdir
ENV: Set environment variables. They use key-value pairs to increase the flexibility of running the program. The syntax is as follows:
Env
USER: A UID is set when mirroring is running. The syntax is as follows:
USER
VOLUME: Authorizes access to directories from within the container to the host. The syntax is as follows:
VOLUME ["/data"]
is used to create a container, the program specified by entrypoint is set as the default program. Entrypoint has two forms:
ENTRYPOINT ["executable", "param1", "param2"]ENTRYPOINT command param1 param2
Commands executed through docker run do not overwrite entrypoint, and any parameters specified in the docker run command are passed to entrypoint again as parameters. Only one entrypoint command is allowed i
How the environment variables in the Lumen/Laravel. env file take effect
The. env file can be used to customize any other valid environment variables. You can call env (), $ _ SERVER, or $ _ ENV to obtain the variables. So how does env () load these variables? In Lumen's ven
JNI Layer Debug Thread crash reasonOne, causing the crash reason:In the thread function of the JNI layer, as long as the function called Env is added, it freezes two, the solution first we should understand: ① (Independence) jnienv is a thread-related variable, that is, thread A has a jnienv variable, thread B also has a jnienv variable, because thread-related, so a A thread cannot use the jnienv struct variable of a B thread.So how do you ensure the
Jni debugging 3 (thread debugging env variable issues), jnienv
Cause of thread crash in jni layer debugging
1. Cause of crash:In the thread function in the jni layer, if you add a function that calls env, it will crash. 2. solution 1: ① (independence) JNIEnv is a thread-related variable, that is, thread A has A JNIEnv variable, and thread B also has A JNIEnv variable. Due to thread-related, thread A cannot
The. env file can customize any other valid environment variables and can be
call env () or $_server or $_env To get the variable. So how does env () load into these variables? In Lumen's vendor/laravel/lumen-framework/src/helpers.php, we can see that the ENV function is defined like this:
if (function_exists ('
PHP $ _ ENV variable $ _ ENV is an array containing server-side environment variables. It is a super global variable in PHP. we can directly access it anywhere in the PHP program. $ _ ENV only passively accepts server-side environment variables and converts them into array elements. you can... SyntaxHighlighter. all ();
PHP $ _
:/root/.docker/machine/certs/ca.pemcreating Client Certificate:/root/.docker/machine/certs/cert.pemrunning pre-create checks ... Creating machine ... (host1) No SSH key specified. Assuming an existing key in the default location. Waiting for machine to is running, this could take a few minutes ... Detecting operating system of created instance ... Waiting for SSH to be available ... Detecting the Provisione
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