Managing Servers

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Managing Servers

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You can see servers belonging to the key by clicking on the key itself in Managing Keys interface.



The screen shows servers registered under the key, their IP, hostname, effective kernel as well as the time of registration and last check in.


Managing Script


Note. If scripts do not work on your ePortal, you might need to update ePortal first. To update ePortal, please run the following command:


> yum update kcare-eportal


To view the list of all servers IDs that are connected to the particular key, do the following:

In the UI go to the page with the list of keys. Then click the particular key. The list of servers connected to this key will be displayed.


To view the list of all servers IDs that are not connected to any key, do the following:

In the UI go to the page with the list of keys. Then click Reset filters button.

OR just follow this URL http://EPORTAL_IP/admin/kcserver/.



Script to unroll patchsets


To unroll patchset run:


> kc.eportal --unroll 16012017_1


Script to determine the number of servers under the management of ePortal, per key


To see pairs of key/number of servers run:


> kc.eportal --list-servers


Count | Key

----- + --------------------------------

  0 | 2shcolu7Y1x6885Q

  2 | 6J89aS44j6OmTr05



Script to automatically install latest patchsets


It determines if latest patches are available and installs them.


>kc.eportal --get-latest


Unroll patches from UI


In the patch-source page, there is a list of available patches. To unroll patches click the button Roll back this patch, and all after it.

Use it to roll back the patch and all the following patches.


Show extended check-in statistics in admin UI


A new table is added to the starting page. This table displays the following:

Total number of servers.

Number of servers that checked in for the past 48 hours.


The number of servers for each key is listed in the Key Inventory table.


Ability to create read-only users


[root@localhost ~]# kc.eportal -l

Num | Username

--- + --------------------------------

 1 | admin

 2 | user

[root@localhost ~]# kc.eportal -r user

User 'user' is now readonly


Feed Management


Feeds are intended to manage patchsets on the server, and they provide a possibility to bind a set of patches to a specific key. Possible use cases: for preliminary testing of patches, for applying updates to groups of servers with the similar hardware, etc.


To get into Feeds Management interface go to Settings → Feeds:




On this page a user can manage the existing feeds: create, delete, edit.




Available options:

Name — a name of a feed.

Auto update — enable and disable automatic downloading of patches to this feed.

Deploy after X hours — a delay in hours between the moment the patchset is available for deployment and the moment it is installed to the feed.


Every 10 minutes ePortal checks for new patches on the main patch server. If a new patch is available, it is uploaded to the ePortal server. Note: it is uploaded but is not deployed. The patch availability time is considered starting from the moment a new patch appears on the ePortal, and that time is taken into account in Deploy after X hours option. So, if a user sets Deploy after X hours = 10, the patch will be deployed to the feed 10 hours after it has been downloaded to the ePortal server.


To make the feed auto-update immediately (so that, new patches are loaded to the feed immediately after they are available on ePortal), set Deploy after X hours = 0.


A special case is a clean installation when ePortal is installed on a new server (there aren't any downloaded archives with patches and feeds with deployed patchsets, including default feed). In this case, if a user creates a new feed and sets Deployed after X hours option right away, then all patches (from the oldest to the latest available) will be deployed to the feed after the specified X hours. This is because the archives are downloaded from scratch and will be considered as “just appeared on ePortal” — that is, all patches will have the same appearance time on ePortal from which the option Deploy after X hours will repel.




On the main ePortal page, a user can set the corresponding key <> feed pair. This is done in the key creation interface or when editing a key.




By default, a new key is bound to the default feed, alternatively, a user can choose a desired feed from the drop-down menu.




Note that when removing a feed all keys attached to this feed will be moved to the default feed.




Adding extra Tag field


To add an extra Tag field for the server, run:


kcarectl --tag command


where command is a parameter defined by a user. This parameter will be displayed in UI for the server. User could add multiple tags for each server. Each tag should be separated with ‘;’ symbol.




kcarectl --tag “env:prod;ubuntu”


This server has two tags : env:prod and ubuntu.


env:prod is a parameter that has tag name env and the value prod.




To remove all tags from a particular server, run:


kcarectl --tag ""


Where ''" is a parameter to delete the previously defined tag.



How to setup ePortal to use HTTPS


Some assumptions for a server where e-portal is deployed:


1. A firewall is disabled for 443 port.

2. Private and public keys are downloaded on the server.


Edit ssl configuration template according to your certificates:


mv /etc/nginx/eportal.ssl.conf.example /etc/nginx/eportal.ssl.conf
vi /etc/nginx/eportal.ssl.conf


Include this configuration into the main one:


sed -e '3iinclude eportal.ssl.conf;' -i /etc/nginx/conf.d/eportal.conf


Restart nginx:


service nginx restart


In order to communicate with e-portal, updated to https, you need to modify KernelCare config files on all the servers if they have IPs hardcoded servers settings.


To do that, update PATCH_SERVER and REGISTRATION_URL environment variables:


vi /etc/sysconfig/kcare/kcare.conf


So, after editing your /etc/sysconfig/kcare/kcare.conf should contain updated PATCH_SERVER and REGISTRATION_URL environment variables like in the example below:




The following example demonstrates how to connect new servers to e-portal configured for https:


$ export KCARE_PATCH_SERVER=https://eportal_domain_name/
$ export KCARE_REGISTRATION_URL=https://eportal_domain_name/admin/api/kcare
$ export
$ curl -s | bash
$ /usr/bin/kcarectl --register key_from_your_eportal