Ops
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Basic Usage
Build and Deploy Nanos Unikernel
Create a file called
main.go with the content below:1
package main
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import "fmt"
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func main() {
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fmt.Println("Hello World!")
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}
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Build it:
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$ GOOS=linux go build main.go
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Package and deploy:
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$ ops run main
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Create a file called
ex.php with the content below:1
<?php
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phpinfo();
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?>
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Package and deploy:
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$ ops pkg load php_7.2.13 -a ex.php
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Create a file called
ex.js with the content below:1
console.log("Hello World!");
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Package and deploy:
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$ ops pkg load node_v14.2.0 -a ex.js
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You should see "Hello World!" printed on your screen and then the ops command exits. For more examples using NodeJS, visit our examples repository.
Run and Pass an Environment Variable
This can be done via the configuration file but if you want to dynamically inject without having to rely on the configuration file this is the way:
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package main
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import (
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"fmt"
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"os"
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"strings"
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)
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func main() {
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fmt.Println("FOO:", os.Getenv("FOO"))
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fmt.Println("BAR:", os.Getenv("BAR"))
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fmt.Println()
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for _, e := range os.Environ() {
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pair := strings.SplitN(e, "=", 2)
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fmt.Println(pair[0])
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}
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}
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$ GOOS=linux go build
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$ ops run -e FOO=1 tea
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Load vs Run
While both of these commands are used to execute code, there is a big difference when you would choose to run one rather than the other. For
ops run, you would use this command to run compiled code (executable machine code). So, for example, any golang code that you may run, you would use this command. Any code that is compiled at runtime, you would use ops pkg load. Example of languages where you would use this are NodeJS or PHP. Each supported language for ops pkg load, will have a corresponding package. To see a list of available packages, run ops pkg list.Nightly vs. Main
Right now we have two release channels. If you run ops as is you are tracking the main release channel. There is no update frequency associated with it just whenever we deem significant work has been done and we are not horribly breaking anything.
The other channel you can track is the nightly channel. This is populated every night via the build system with whatever is in master. So if you want bleeding edge you can utilize that.
The magic incantation for tracking this channel is simply to switch the
-n or --nightly flag on.For example:
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$ ops -n run main
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If there are already cached images you can use the
--force or -f flag to replace them with the lastest images from a given channel. For example, the following command will both track the nightly channel and replace any cached images with the lastest from that channel:1
$ ops -nf run main
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OPS itself also tracks nightly builds.
Supported Operating Systems
OPS can run on many different Unix based environments.
Last modified 2mo ago