⭕ immortal

A *nix cross-platform (OS agnostic) supervisor

run on behalf other system user

If services need to run on behalf other system user www, nobody, www-data, not root, immortal should be compiled from source for the desired target/architecture, otherwise, this error may be returned:

Error looking up user: "www". user: Lookup requires cgo

See more: https://golang.org/cmd/cgo/

If using FreeBSD or macOS you can install using pkg/ports or homebrew, for other platforms work is in progress, any help for making the port/package for other systems would be appreciated.

Compile from source

Setup go environment https://golang.org/doc/install

go >= 1.9 is required

For example using $HOME/go for your workspace

$ export GOPATH=$HOME/go

Create the directory:

$ mkdir -p $HOME/go/src/github.com/immortal

Clone project into that directory:

$ git clone git@github.com:immortal/immortal.git $HOME/go/src/github.com/immortal/immortal

Build by just typing make:

$ cd $HOME/go/src/github.com/immortal/immortal
$ make

To install/uninstall:

$ make install
$ make uninstall

configuration example

Content of file /usr/local/etc/immortal/www.yml:

# pkg install go-www
cmd: www
cwd: /usr/ports
log:
    file: /var/log/www.log
    age: 10  # seconds
    num: 7   # int
    size: 1  # MegaBytes
wait: 1
require:
  - foo
  - bar

If foo and bar are not running, the service www will not be started.

foo and bar are the names for the services defined on the same path www.yaml is located, foo.yml & bar.yml

Paths

When using immortaldir:

/usr/local/etc/immortal
|--foo.yml
|--bar.yml
`--www.yml

The name of the file.yml will be used to reference the service to be daemonized excluding the extension .yml.:

foo
bar
www

/var/run/immortal/

/var/run/immortal
|--foo
|  |-lock
|  `-immortal.sock
|--bar
|  |-lock
|  `-immortal.sock
`--www
   |-lock
   `-immortal.sock

immortal like non-root user

Any service launched like not using using immortaldir will follow this structure:

~/.immortal
|--(pid)
|  |--lock
|  `--immortal.sock
|--(pid)
|  |--lock
|  `--immortal.sock
`--(pid)
   |--lock
   `--immortal.sock

immortalctl

Will print current status and allow to manage the services

debug

pgrep -fl "immortal -ctl"  | awk '{print $1}' | xargs watch -n .1 pstree -p

Test status using curl & jq

status:

curl --unix-socket immortal.sock http:/status -s | jq

note the single '/' https://superuser.com/a/925610/284722

down:

curl --unix-socket immortal.sock http://im/signal/d -s | jq

up:

curl --unix-socket immortal.sock http://im/signal/u -s | jq

qiwenilli / immortal