Cocaine

[Виталий Исаев]

Hello,

I am trying to deploy the Cocaine - Elliptics - Docker cloud according to the well-known manual published on Habr but with a few modifications:

1. Centos 7 with systemd;
   
2. The recent version of Cocaine:
   [root@vm1 ~]# rpm -qa | grep cocaine
   cocaine-runtime-0.11.3.1-1.el7.x86_64
   libcocaine-core2-0.11.3.1-1.el7.x86_64
   cocaine-plugin-elliptics-2.26.3.35-1.el7.x86_64
   

The Elliptics is running on the vm0 (192.168.122.100), and I want to launch the Cocaine-runtime on vm1 (192.168.122.101). Here is my configuration:

[root@vm1 ~]# cat /etc/cocaine/cocaine-cloud.conf
{
    "version": 2,
    "paths": {
        "plugins": "/usr/lib/cocaine",
        "runtime": "/var/run/cocaine",
        "spool": "/var/spool/cocaine"
    },
    "network": {
    "group": "224.168.2.9"
    },
    "services": {
        "logging": {
            "type": "logging"
        },
        "storage": {
            "type": "elliptics",
            "args": {
                 "backend": "core"
            }
        },
        "node": {
            "type": "node",
            "args": {
                "runlist": "default"
            }
        }
    },
    "storages": {
        "core":
        {
            "type": "elliptics",
            "args":
            {
                "nodes": ["192.168.122.100:1025:2"],
        "io-thread-num" : 8,
        "wait-timeout" : 30,
        "check-timeout" : 60,
        "net-thread-num" : 8,
        "groups" : [1],
        "verbosity" : 2
            }
        }
    },
    "loggers": {
        "core": {
            "type": "syslog",
            "args": {
                "identity": "cocaine",
                "verbosity": "info"
            }
        }
    }
}

The next step is systemd configuration:

[root@vm1 system]# cd /usr/lib/systemd/system
[root@vm1 system]# wget https://raw.githubusercontent.com/cocaine/cocaine-core/master/fedora/cocaine-runtime.service
[root@vm1 system]# sed -i.bak 's/cocaine-default.conf/cocaine-cloud.conf/' cocaine-runtime.service

First start attempt:

[root@vm1 system]# systemctl daemon-reload
[root@vm1 system]# systemctl restart cocaine-runtime.service
[root@vm1 system]# systemctl status cocaine-runtime.service -l
cocaine-runtime.service - Cocaine runtime components
   Loaded: loaded (/usr/lib/systemd/system/cocaine-runtime.service; disabled)
   Active: failed (Result: exit-code) since Thu 2015-02-12 05:58:19 EST; 10s ago
  Process: 2349 ExecStart=/usr/bin/cocaine-runtime -c /etc/cocaine/cocaine-cloud.conf (code=exited, status=1/FAILURE)
 Main PID: 2349 (code=exited, status=1/FAILURE)

Feb 12 05:58:19 vm1.vitaly.ru systemd[1]: Starting Cocaine runtime components...
Feb 12 05:58:19 vm1.vitaly.ru systemd[1]: Started Cocaine runtime components.
Feb 12 05:58:19 vm1.vitaly.ru cocaine-runtime[2349]: ERROR: unable to initialize the configuration - the /var/run/cocaine directory does not exist.
Feb 12 05:58:19 vm1.vitaly.ru systemd[1]: cocaine-runtime.service: main process exited, code=exited, status=1/FAILURE
Feb 12 05:58:19 vm1.vitaly.ru systemd[1]: Unit cocaine-runtime.service entered failed state.
[root@vm1 system]#

Ok, I can do it on my own:

[root@vm1 system]# mkdir /var/run/cocaine
[root@vm1 system]# systemctl restart cocaine-runtime.service
[root@vm1 system]# systemctl status cocaine-runtime.service -l
cocaine-runtime.service - Cocaine runtime components
   Loaded: loaded (/usr/lib/systemd/system/cocaine-runtime.service; disabled)
   Active: failed (Result: exit-code) since Thu 2015-02-12 06:01:03 EST; 1s ago
  Process: 2376 ExecStart=/usr/bin/cocaine-runtime -c /etc/cocaine/cocaine-cloud.conf (code=exited, status=1/FAILURE)
 Main PID: 2376 (code=exited, status=1/FAILURE)

Feb 12 06:01:03 vm1.vitaly.ru systemd[1]: Starting Cocaine runtime components...
Feb 12 06:01:03 vm1.vitaly.ru systemd[1]: Started Cocaine runtime components.
Feb 12 06:01:03 vm1.vitaly.ru cocaine-runtime[2376]: ERROR: unable to initialize the context - the 'elliptics' component is not available.
Feb 12 06:01:03 vm1.vitaly.ru systemd[1]: cocaine-runtime.service: main process exited, code=exited, status=1/FAILURE
Feb 12 06:01:03 vm1.vitaly.ru systemd[1]: Unit cocaine-runtime.service entered failed state.
[root@vm1 system]#

I have no idea why elliptics is unavailable? It seemed that all the dependencies were installed properly.

Thank you.

[Виталий Исаев]

I was told that cocaine is looking for the extensions in /usr/lib/cocaine, but the package moves them to /usr/lib64. Here is a workaround.

[root@vm1 system]# repoquery -l cocaine-plugin-elliptics
/usr/lib64/cocaine/elliptics-extensions.cocaine-plugin
[root@vm1 system]# cd /usr/lib/
[root@vm1 lib]# ln -s /usr/lib64/cocaine/ .

[Andrey Sibiryov]

You could simply change the "paths/plugins" (line 4 in your example) configuration entry to "/usr/lib64/cocaine", specifying that plugins should be looked for in a different location on the filesystem.

[Антон Тюрин]

Hello,

A path, where  cocaine looks for plugins, is configuried by option  "pluigns" in "path" section. In your configuration file it points to '/usr/lib/cocaine'.
So you can change without any symlinks magic.

четверг, 12 февраля 2015 г., 14:40:53 UTC+3 пользователь Виталий Исаев написал: