Miehistö (formerly grenadine) is a checkpoint/restore manager for application servers, using CRIU(Checkpoint and Restore In Userspace) internally.
"Miehistö" is the Suomi(Finnish) word equivalent to CREW in English :)
TODO: write in some human languages.
- Kernel 3.11 (CRIU's requirement, newer is better)
criucommand and service (recommended: criu > 3.14)
TODO...
git clone https://github.com/udzura/miehitsto.git; cd miehisto
rake
sudo mv -v ./mruby/bin/* /usr/local/bin- Both libcriu and libprce will be statically linked.
- Also see mruby itself's prerequisites
# All logs are put to stdout/err. TODO: Unit file
$ sudo miehistod >/var/log/miehistod.log 2>&1 &$ sudo mhctl service create /usr/bin/ruby -run -e httpd -- /var/www/html
$ curl localhost:8080
<h1>It works?</h1>
$ sudo mhctl service list
OBJECT_ID PID PPID ARGS
9491c63874fac947cc46d437b028b189 68248 68243 /usr/bin/ruby -run -e httpd -- /var/www/html# TODO: specify by object_id
$ sudo mhctl service dump -t 68248
/var/lib/miehisto/images/742e79e9de83a9091424edb0fa463235
# Service will be stopped
$ sudo mhctl service list
OBJECT_ID PID PPID ARGS
$ curl localhost:8080
curl: (7) Failed to connect to localhost port 8080: Connection refused$ sudo mhctl image list
OBJECT_ID COMM PAGE_SIZE CTIME
742e79e9de83a9091424edb0fa463235 ruby 21.41MiB 2020-11-13 12:37:30 +0000
e5912ffa22a8ed2f6ec35c1e4d463d4d memcached 792.00KiB 2020-11-13 07:22:50 +0000$ sudo mhctl service restore --from 742e79e9de83a9091424edb0fa463235
742e79e9de83a9091424edb0fa463235
$ sudo mhctl service list
OBJECT_ID PID PPID ARGS
9491c63874fac947cc46d437b028b189 68668 68660 /usr/bin/ruby -run -e httpd -- /var/www/html
# Works again!
$ curl localhost:8080
<h1>It works?</h1>More information/usecases are TBD :(
Under the MIT License. See LICENSE file.
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