I'm reading Windows 10 IoT Core Recovery.
In this method, the device contains a safe OS in a separate partition. Based on the location of the recovery SW, there can be few options.
What is the administrator password after the process is finished?
The default password of administrator is p#ssw0rd.
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I am trying to configure a user defined parameter on a Windows host. All my hosts are configured with PSK encryption and Zabbix server is able to get data without any issues.
However I cannot figure out how to use the zabbix_get manually with PSK encryption enabled.
zabbix_get -s x.x.x.x -p 10050 -k "internet.connection.check" --tls-connect=psk --tls-psk-identity="name" --tls-psk-file=cannot find any psk file on zabbix server
The problem is I cannot locate any PSK file on the zabbix server. Can I pass the PSK somehow?
The serverside PSK is configured in the GUI and stored in the database.
The Zabbix agent stores the PSK in a file.
I see 3 options:
Manually create a psk-file.
Remember that a change of the key must be done in the GUI, at the agent and in your special file.
Make a script that reads the key from the database.
Remember that direct access to the database of an application is most times forbidden and can cause compatibility issues after updating the application. Read-only access should be possible.
Use the same keys for all your agents;
When you install a Zabbix Agent on the Zabbix Server (allowing you to monitor the server), you do have a file on a normal place.
I wouldn't try to use an API or some smart script during Discovery, this will make the solution hard to maintain. I withdraw my last remark, when you have thousands of servers to monitor and a team working with Zabbix.
I use Zabbix 3.4.4 and I have Host group of FreeBSD-11 hosts. How can I restart all hosts from this host group? Do I need zabbix agent for every FreeBSD host necessarily ?
With Zabbix agent you can use remote commands to do so. Agent is usually a good idea in any case as it allows easy collection of a lot of metrics.
Without agent, you would probably have to resort to SSH remote commands, described in the same page or if you have access to the hardware, even the IPMI commands.
I have installed Zabbix 3.4 by Oracle Linux 7.4
Is it possible for the agent to accumulate data if the connection with the APP is lost?
If by "APP" you mean Zabbix server, this is possible if you use active items. Agent will buffer values in the memory for a while and send them to the server when the connection is restored.
We're using OpenNebula to simulate a simple replicated JBoss application.
We've installed all opennebula packages, qemu and kvm and libvirt.
We have created a simple ethernet network ad hoc between my pc (a node) and the one of my friend (which is both node and front-end) by plugging an ethernet cable between me and him (10.0.0.1 and 10.0.0.2).
So we can ping each other correctly, we've set everything to that we can ssh without a password to each other with "oneadmin" user.
We've configured all files such as below:
/etc/libvirt/libvirtd.conf
/etc/default/libvirtd-bin
And so on...
kvm and kvm-intel are both enabled.
The daemon
libvirtd -d -l
seems to start correctly.
In fact, from the gui of opennebula in the front end, we can see both the hosts monitored.
Anyway there's a problem when we try to start the virtual machine on the node which is not the front-end. I mean when we try to do a deploy of a VM on the other node. The error is something like this
cannot stat `/var/lib/one/datastores/1/f5394317d377beaa09fc07697df9ff68
but if, from the front end which has virtual machine n°1 we perform,
cd /var/lib/one/datastores/1
then we can see that file, we've also given all the permissions to it...
Any idea? :(
This may be related with the datastore configuration. If you left the default values, OpenNebula expects a shared filesystem (ie NFS) between the front-end and the virtualization nodes.
More context on the error (which I believe can be found in /var/lib/one/oned.log) would help analysing this problem.
I have MYSQL installed in my Windows system. If I just turn on the system and leave it at the Windows Login screen without logging in, I'm still able to access the MYSQL DB from a remote system by knowing the IP.
Is this normal? Does MYSQL begin running even before login? Or is remote login somewhat different?
It's usually a windows service, and that indeed starts before you login.
Yes, MySQL service will start when Windows started and you can connect any MySQL hosted system on the network knowing IpAddress OR System Name.
If you want to block connecting your MySQL DB, ref: this link