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Chapter 6. Patching Your Systems
To patch your systems through Satellite Server, you need to register your systems first, and then choose to install Katello agent or use remote execution. Remote execution is enabled by default. This chapter covers both methods. Choose the option that suits your environment
6.1. Registering Existing Hosts
This section explains how to register Red Hat Enterprise Linux Hosts and Atomic Hosts.
6.1.1. Registering an Existing Red Hat Enterprise Linux Host
- On the host, clear any old data to ensure updated data is uploaded correctly. - subscription-manager clean - # subscription-manager clean- Copy to Clipboard Copied! - Toggle word wrap Toggle overflow 
- Install the katello-ca-consumer-latest RPM. - rpm -Uvh http://satellite.example.com/pub/katello-ca-consumer-latest.noarch.rpm - # rpm -Uvh http://satellite.example.com/pub/katello-ca-consumer-latest.noarch.rpm- Copy to Clipboard Copied! - Toggle word wrap Toggle overflow - This installs the proper certificates which allow communication between the client and the Satellite Server. 
- Register the host. - subscription-manager register --org="Default_Organization" \ --activationkey=ak-Reg_To_Dev_EL7 - # subscription-manager register --org="Default_Organization" \ --activationkey=ak-Reg_To_Dev_EL7- Copy to Clipboard Copied! - Toggle word wrap Toggle overflow 
6.1.2. Registering an Atomic Host
The following procedure explains how to register an Atomic Host with Subscription Manager.
- Retrieve - katello-rhsm-consumerfrom the Satellite Server:- wget http://satellite.example.com/pub/katello-rhsm-consumer - [root@atomic_client ~]# wget http://satellite.example.com/pub/katello-rhsm-consumer- Copy to Clipboard Copied! - Toggle word wrap Toggle overflow 
- Change the mode of - katello-rhsm-consumerin order to make it executable:- chmod +x katello-rhsm-consumer - [root@atomic_client ~]# chmod +x katello-rhsm-consumer- Copy to Clipboard Copied! - Toggle word wrap Toggle overflow 
- Run - katello-rhsm-consumer:- ./katello-rhsm-consumer - [root@atomic_client ~]# ./katello-rhsm-consumer- Copy to Clipboard Copied! - Toggle word wrap Toggle overflow 
- Register with Red Hat Subscription Manager: - subscription-manager register - [root@atomic_client ~]# subscription-manager register- Copy to Clipboard Copied! - Toggle word wrap Toggle overflow 
						Because Atomic is functionally an appliance, we do not recommend that you try to install katello-agent on it.
					
6.2. Patching Your System Using Katello Agent
6.2.1. Installing Katello Agent
					On the content host, install the katello-agent RPM package.
				
yum install katello-agent
# yum install katello-agentThe goferd service must be running so that the Red Hat Satellite Server or Capsule Server can provide information about errata that are applicable for content hosts.
Ensure goferd is running:
- On Red Hat Enterprise Linux 6, run the following command: - service goferd start - # service goferd start- Copy to Clipboard Copied! - Toggle word wrap Toggle overflow 
- On Red Hat Enterprise Linux 7, run the following command: - systemctl start goferd - # systemctl start goferd- Copy to Clipboard Copied! - Toggle word wrap Toggle overflow 
6.2.2. Applying Errata to Content Hosts
Applying Errata to Content Hosts Using the Web UI
- 
							Go to Hosts Content Hosts and click on auth01.example.com.
- Select the Errata tab to view the list of errata applicable to the content host.
- From the list, select an errata.
- Click Apply Selected.
- A confirmation message appears. Click Apply.
- Verify that the errata has been applied to the client. - yum list-sec - [root@client ~]# yum list-sec- Copy to Clipboard Copied! - Toggle word wrap Toggle overflow 
6.3. Patching Your System Using Remote Execution
6.3.1. Enabling Remote Execution on a Host
					During Satellite Server installation, an internal Capsule Server is automatically installed along with a public SSH key. The internal Capsule Server loads the SSH key from /usr/share/foreman-proxy/.ssh/id_rsa_foreman_proxy. You can enable remote execution by distributing the public SSH key to a host.
				
On the Satellite Server, distribute the key to the host.
ssh-copy-id -i ~foreman-proxy/.ssh/id_rsa_foreman_proxy.pub root@auth01.example.com
 # ssh-copy-id -i ~foreman-proxy/.ssh/id_rsa_foreman_proxy.pub root@auth01.example.com6.3.2. Installing Errata on Your Host
Satellite provides default job templates for executing remote jobs, one of which is for installing errata.
- 
							Go to Hosts All hosts and click the check box next to the host’s name. 
- Click Select Action and select Schedule Remote Job from the drop-down menu.
- In the Job category drop-down menu, select Katello.
- In the Job template drop-down menu, select Install Errata-Katello SSH Default.
- In the errata field, enter the errata ID.
- Select Execute now and click Submit.