Packages

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Packages
Packages are officially supported images with pre-compiled languages (ie nodejs and php) or applications (ie Redis and Nginx). This makes it easier and more convenient to execute code without needing to compile your own interpreter(s).
You can also create and upload your own public and private packages at https://repo.ops.city as well.
Listing Packages
To get a list of currently supported packages, run the following command:
$ ops pkg list
The package list can also be searched by simply providing a regular expression to the list command's --search option (-s for short).
$ ops pkg list --search ^[lr]
​
+-------------+---------+----------+-------------+
| PACKAGENAME | VERSION | LANGUAGE | DESCRIPTION |
+-------------+---------+----------+-------------+
| ruby_2.3.1  | 2.3.1   | ruby     | ruby        |
+-------------+---------+----------+-------------+
| lua_5.2.4   | 5.2.4   | lua      | lua         |
+-------------+---------+----------+-------------+
Note: This command will probably go away in the future in favor of search.
Getting package locally
Package can be downloaded to the local cache ~/.ops/packages using ops get command.
$ ops pkg get <package_name>
Information of Package
Package description provides common assumptions and settings required for running your application with help of package. You can get package description using ops pkg describe <package_name> command.
$ ops pkg describe nginx_1.15.6
Information for nginx_1.15.6 package:
Sample Readme for Nginx Application
Contents of Package
If you want see contents of a package, you can use ops pkg contents <package_name> command.
$ ops pkg contents perl_5.22.1
File :/package.manifest
File :/perl
Dir :/sysroot
Dir :/sysroot/lib
Dir :/sysroot/lib/x86_64-linux-gnu
File :/sysroot/lib/x86_64-linux-gnu/libc.so.6
File :/sysroot/lib/x86_64-linux-gnu/libcrypt.so.1
File :/sysroot/lib/x86_64-linux-gnu/libdl.so.2
File :/sysroot/lib/x86_64-linux-gnu/libm.so.6
File :/sysroot/lib/x86_64-linux-gnu/libnss_dns.so.2
File :/sysroot/lib/x86_64-linux-gnu/libpthread.so.0
Dir :/sysroot/lib64
File :/sysroot/lib64/ld-linux-x86-64.so.2
Removing local packages
By default, downloaded packages are stored in ~/.ops/bin/.packages. If you'd like to remove a package from your hard drive, whether its to conserve space, or to force a re-download of the package, you can do it here utilizing the rm cli tool.
Creating a Custom or Local Dev packages
https://github.com/nanovms/ops/blob/master/PACKAGES.md
then copy over an un-tarred dir to ~/.ops/local_packages
Finally you can run it via the local flag:
ops pkg load --local mypkg -a b.php -v
You can use the --missing-files flag on 'ops run' to hunt down any missing shared libraries that might not be getting loaded from the ldd output. For example with ruby:
$ ops run --missing-files /usr/local/bin/ruby
booting /home/eyberg/.ops/images/ruby.img ...
en1: assigned 10.0.2.15
`RubyGems' were not loaded.
`did_you_mean' was not loaded.
missing_files_begin
encdb.so
encdb.so.rb
encdb.so.so
ansi_x3_4_1968.so
ansi_x3_4_1968.so.rb
ansi_x3_4_1968.so.so
rubygems.rb
rubygems.so
did_you_mean.rb
did_you_mean.so
missing_files_end
You can also turn on '--trace' to find the locations it might be in. A common idiom would to be run:
$ ops run --trace /usr/local/bin/ruby &>/tmp/missing
then grep through the output to find loads that failed.
If you wish to create your own local package you can use this as a template with your program being 'test':
➜  test_0.0.1 tree
.
├── package.manifest
├── sysroot
└── test
​
1 directory, 2 files
At a minimum your package.manifest should have the following fields:
{
   "Program":"test_0.0.1/test",
   "Args" : ["test"],
   "Version":"0.0.1"
}
It is important to note that the Program path should be valid. If you wish you may also add Language, Runtime, Description into the manifest so they show up in the search.
These have been traditionally populated from ~/.ops/packages/manifest.json . You may also wish to include a README.md inside the package.
Then we can directly add the package in question as we develop on it:
ops pkg add test_0.0.1 --name test_0.0.1
We can finally load the package:
ops pkg load -l test_0.0.1
Create a Cloud Image from Local Package
Creating a cloud image from your local package is just like creating it from a regular package but you pass the '-l' flag in:
ops image create -c test.json -l --package c2_0.0.1 -t gcp -i mytest2
Create a Package from Docker
You can create a local package from an existing docker container. If the container does not exist it will download it first and then convert it into a unikernel. Currently this just grabs the binary and libraries necessary to run it versus the entire filesystem that might be present.
$ ops pkg from-docker node:16.3.0 -f node
​
$ ops pkg load -l node-16.3.0 -a a.js
booting /Users/qtmsheep/.ops/images/program ...
en1: assigned 10.0.2.15
Hello
exit status 1
If you would like to create a package from a local image try this workflow:
Sample Dockerfile:
FROM debian
CMD ["/bin/ls"]
Note: Right now the build process is dependent upon a non-scratch environment, for instance using ldd and cut.
docker build -t bob .
ops pkg from-docker bob -n bob -f ls
ops pkg load --local bob
Login to the OPS Repo
To upload private and public packages or use your private packages:
You'll need to initially create an account at https://repo.ops.city . For now it just relies on github auth:
ops pkg login <api_key>
Upload a Package
If you have an account from the above step you can login with your apikey:
ops pkg login <api-key>
Then, for example, you could create a new node package from docker and then push it up:
ops pkg from-docker node:16.3.0 -f node
ops pkg push node-16.3.0
Search
You can search for a pakage on https://repo.ops.city like so:
ops pkg search gatsby
Then intention is that this will eventually deprecate 'ops pkg list'.
Debugging
When working with scripting languages you might run into issues where they load libraries at run-time that you aren't aware you need. There are two ways to identify these:
You can turn on --trace with ops to look for it loading libraries:
ops run myprogram --trace &>/tmp/out
grep -B 1 "direct return: -" /tmp/out
You can use strace and run it normally and look for explicit dlopen calls:
strace myprogram 2>&1 | grep -E '^open(at)?\(.*\.so' > /tmp/dlopen
Once you find the missing library you can create the proper directory in your package and copy it in or put it into a local directory structure if just using 'ops run'.
Networking
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On this page
Listing Packages
Getting package locally
Information of Package
Contents of Package
Removing local packages
Creating a Custom or Local Dev packages
Create a Cloud Image from Local Package
Create a Package from Docker
Upload a Package
Debugging