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Posted to users@cloudstack.apache.org by Granwille Strauss <gr...@namhost.com.INVALID> on 2024/04/03 08:28:53 UTC

Upgrading to 4.19.0.1 and now host is disconnected

Hi

I have two Almalinux 8 hosts, both identically configured and uses same 
package versions. I just upgraded to 4.19.0.1, as well as upgrade 
cloudstack-agent accordingly. My one host now fails to connect and 
remains in "Disconnected" state. While the other connects successfully.

One the host that fails, the agent log shows this:

---

2024-04-03 10:18:51,616 INFO  [cloud.agent.AgentShell] (main:null) 
(logid:) Agent started
2024-04-03 10:18:51,622 INFO  [cloud.agent.AgentShell] (main:null) 
(logid:) Implementation Version is 4.19.0.1
2024-04-03 10:18:51,625 INFO  [cloud.agent.AgentShell] (main:null) 
(logid:) agent.properties found at /etc/cloudstack/agent/agent.properties
2024-04-03 10:18:51,679 INFO  [cloud.agent.AgentShell] (main:null) 
(logid:) Defaulting to using properties file for storage
2024-04-03 10:18:51,681 INFO  [cloud.agent.AgentShell] (main:null) 
(logid:) Defaulting to the constant time backoff algorithm
2024-04-03 10:18:51,745 INFO  [cloud.utils.LogUtils] (main:null) 
(logid:) log4j configuration found at /etc/cloudstack/agent/log4j-cloud.xml
2024-04-03 10:18:51,745 INFO  [cloud.agent.AgentShell] (main:null) 
(logid:) Using default Java settings for IPv6 preference for agent 
connection
2024-04-03 10:18:51,853 INFO  [cloud.agent.Agent] (main:null) (logid:) 
id is 36
2024-04-03 10:18:51,868 ERROR [kvm.resource.LibvirtComputingResource] 
(main:null) (logid:) uefi properties file not found due to: Unable to 
find file uefi.properties.
2024-04-03 10:18:51,949 INFO  [kvm.resource.LibvirtConnection] 
(main:null) (logid:) No existing libvirtd connection found. Opening a 
new one

---

And the log just remains stuck there.

One the connected host it shows:

---

2024-04-03 10:19:37,769 INFO  [cloud.agent.AgentShell] (main:null) 
(logid:) Agent started
2024-04-03 10:19:37,775 INFO  [cloud.agent.AgentShell] (main:null) 
(logid:) Implementation Version is 4.19.0.1
2024-04-03 10:19:37,778 INFO  [cloud.agent.AgentShell] (main:null) 
(logid:) agent.properties found at /etc/cloudstack/agent/agent.properties
2024-04-03 10:19:37,858 INFO  [cloud.agent.AgentShell] (main:null) 
(logid:) Defaulting to using properties file for storage
2024-04-03 10:19:37,860 INFO  [cloud.agent.AgentShell] (main:null) 
(logid:) Defaulting to the constant time backoff algorithm
2024-04-03 10:19:37,926 INFO  [cloud.utils.LogUtils] (main:null) 
(logid:) log4j configuration found at /etc/cloudstack/agent/log4j-cloud.xml
2024-04-03 10:19:37,926 INFO  [cloud.agent.AgentShell] (main:null) 
(logid:) Using default Java settings for IPv6 preference for agent 
connection
2024-04-03 10:19:38,038 INFO  [cloud.agent.Agent] (main:null) (logid:) 
id is 44
2024-04-03 10:19:38,055 ERROR [kvm.resource.LibvirtComputingResource] 
(main:null) (logid:) uefi properties file not found due to: Unable to 
find file uefi.properties.
2024-04-03 10:19:38,130 INFO  [kvm.resource.LibvirtConnection] 
(main:null) (logid:) No existing libvirtd connection found. Opening a 
new one
2024-04-03 10:19:38,389 WARN [kvm.resource.LibvirtComputingResource] 
(main:null) (logid:) Execution of process [1880112] for command 
[/bin/bash -c ldd /usr/libexec/qemu-kvm | grep -Eqe 
'[[:space:]]liburing\.so' ] failed.
2024-04-03 10:19:38,390 WARN [kvm.resource.LibvirtComputingResource] 
(main:null) (logid:) Process [1880112] for command [/bin/bash -c ldd 
/usr/libexec/qemu-kvm | grep -Eqe '[[:space:]]liburing\.so' ] 
encountered the error: [].
2024-04-03 10:19:38,391 INFO [kvm.resource.LibvirtComputingResource] 
(main:null) (logid:) IO uring driver for Qemu: disabled
2024-04-03 10:19:38,516 INFO [kvm.storage.KVMStoragePoolManager] 
(main:null) (logid:) adding storage adaptor for 
com.cloud.hypervisor.kvm.storage.LinstorStorageAdaptor
2024-04-03 10:19:38,520 INFO [kvm.storage.KVMStoragePoolManager] 
(main:null) (logid:) adding storage adaptor for 
com.cloud.hypervisor.kvm.storage.StorPoolStorageAdaptor
2024-04-03 10:19:38,521 WARN [kvm.storage.KVMStoragePoolManager] 
(main:null) (logid:) Duplicate StorageAdaptor type PowerFlex, not 
loading com.cloud.hypervisor.kvm.storage.ScaleIOStorageAdaptor

---


After this:

> 2024-04-03 10:18:51,949 INFO  [kvm.resource.LibvirtConnection] 
> (main:null) (logid:) No existing libvirtd connection found. Opening a 
> new one

The disconnected host does not want to connect. While the other does.

Can someone please assist with this, please? Both host have the 
following versions:

> /usr/libexec/qemu-kvm --version
> QEMU emulator version 6.2.0 
> (qemu-kvm-6.2.0-40.module_el8.9.0+3714+46544554.2)
> Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers

> libvirtd -v
> 2024-04-03 08:26:59.882+0000: 1939570: info : libvirt version: 8.0.0, 
> package: 22.module_el8.9.0+3714+46544554 (AlmaLinux Packaging Team 
> <pa...@almalinux.org>, 2024-01-15-11:34:31, )

-- 
Regards / Groete

<https://www.namhost.com> 	Granwille Strauss  // Senior Systems Admin

*e:* granwille@namhost.com
*m:* +264 81 323 1260 <tel:+264813231260>
*w:* www.namhost.com <https://www.namhost.com/>

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Re: Upgrading to 4.19.0.1 and now host is disconnected

Posted by Granwille Strauss <gr...@namhost.com.INVALID>.
Hi Mevludin

Thank you for getting back to me, I appreciate it. I found that this was 
the reason for my issue: 
https://lists.apache.org/thread/byhj1p7d39x9lqk5j78bh5qytw3861tm

On 4/3/24 10:49, Mevludin Blazevic wrote:
> Hi,
>
> I had the same issue but with an earlier Cloudstack Version on some 
> hosts, try to to do the following as described in this thread: 
> https://www.mail-archive.com/search?l=users@cloudstack.apache.org&q=subject:%22uefi%22&o=newest&f=1
>
> There are two main files which would need to be created/edited: 
> /etc/cloudstack/agent/uefi.properties and /etc/libvirt/qemu.conf. 
> After that, perform a restart of cloudstack-agent. In the database, 
> you should see an entry in table host_details showing that this 
> particular host has uefi enabled.
>
> Best,
>
> Mevludin
>
> Am 03.04.2024 um 10:28 schrieb Granwille Strauss:
>>
>> Hi
>>
>> I have two Almalinux 8 hosts, both identically configured and uses 
>> same package versions. I just upgraded to 4.19.0.1, as well as 
>> upgrade cloudstack-agent accordingly. My one host now fails to 
>> connect and remains in "Disconnected" state. While the other connects 
>> successfully.
>>
>> One the host that fails, the agent log shows this:
>>
>> ---
>>
>> 2024-04-03 10:18:51,616 INFO  [cloud.agent.AgentShell] (main:null) 
>> (logid:) Agent started
>> 2024-04-03 10:18:51,622 INFO  [cloud.agent.AgentShell] (main:null) 
>> (logid:) Implementation Version is 4.19.0.1
>> 2024-04-03 10:18:51,625 INFO  [cloud.agent.AgentShell] (main:null) 
>> (logid:) agent.properties found at 
>> /etc/cloudstack/agent/agent.properties
>> 2024-04-03 10:18:51,679 INFO  [cloud.agent.AgentShell] (main:null) 
>> (logid:) Defaulting to using properties file for storage
>> 2024-04-03 10:18:51,681 INFO  [cloud.agent.AgentShell] (main:null) 
>> (logid:) Defaulting to the constant time backoff algorithm
>> 2024-04-03 10:18:51,745 INFO  [cloud.utils.LogUtils] (main:null) 
>> (logid:) log4j configuration found at 
>> /etc/cloudstack/agent/log4j-cloud.xml
>> 2024-04-03 10:18:51,745 INFO  [cloud.agent.AgentShell] (main:null) 
>> (logid:) Using default Java settings for IPv6 preference for agent 
>> connection
>> 2024-04-03 10:18:51,853 INFO  [cloud.agent.Agent] (main:null) 
>> (logid:) id is 36
>> 2024-04-03 10:18:51,868 ERROR [kvm.resource.LibvirtComputingResource] 
>> (main:null) (logid:) uefi properties file not found due to: Unable to 
>> find file uefi.properties.
>> 2024-04-03 10:18:51,949 INFO  [kvm.resource.LibvirtConnection] 
>> (main:null) (logid:) No existing libvirtd connection found. Opening a 
>> new one
>>
>> ---
>>
>> And the log just remains stuck there.
>>
>> One the connected host it shows:
>>
>> ---
>>
>> 2024-04-03 10:19:37,769 INFO  [cloud.agent.AgentShell] (main:null) 
>> (logid:) Agent started
>> 2024-04-03 10:19:37,775 INFO  [cloud.agent.AgentShell] (main:null) 
>> (logid:) Implementation Version is 4.19.0.1
>> 2024-04-03 10:19:37,778 INFO  [cloud.agent.AgentShell] (main:null) 
>> (logid:) agent.properties found at 
>> /etc/cloudstack/agent/agent.properties
>> 2024-04-03 10:19:37,858 INFO  [cloud.agent.AgentShell] (main:null) 
>> (logid:) Defaulting to using properties file for storage
>> 2024-04-03 10:19:37,860 INFO  [cloud.agent.AgentShell] (main:null) 
>> (logid:) Defaulting to the constant time backoff algorithm
>> 2024-04-03 10:19:37,926 INFO  [cloud.utils.LogUtils] (main:null) 
>> (logid:) log4j configuration found at 
>> /etc/cloudstack/agent/log4j-cloud.xml
>> 2024-04-03 10:19:37,926 INFO  [cloud.agent.AgentShell] (main:null) 
>> (logid:) Using default Java settings for IPv6 preference for agent 
>> connection
>> 2024-04-03 10:19:38,038 INFO  [cloud.agent.Agent] (main:null) 
>> (logid:) id is 44
>> 2024-04-03 10:19:38,055 ERROR [kvm.resource.LibvirtComputingResource] 
>> (main:null) (logid:) uefi properties file not found due to: Unable to 
>> find file uefi.properties.
>> 2024-04-03 10:19:38,130 INFO  [kvm.resource.LibvirtConnection] 
>> (main:null) (logid:) No existing libvirtd connection found. Opening a 
>> new one
>> 2024-04-03 10:19:38,389 WARN [kvm.resource.LibvirtComputingResource] 
>> (main:null) (logid:) Execution of process [1880112] for command 
>> [/bin/bash -c ldd /usr/libexec/qemu-kvm | grep -Eqe 
>> '[[:space:]]liburing\.so' ] failed.
>> 2024-04-03 10:19:38,390 WARN [kvm.resource.LibvirtComputingResource] 
>> (main:null) (logid:) Process [1880112] for command [/bin/bash -c ldd 
>> /usr/libexec/qemu-kvm | grep -Eqe '[[:space:]]liburing\.so' ] 
>> encountered the error: [].
>> 2024-04-03 10:19:38,391 INFO [kvm.resource.LibvirtComputingResource] 
>> (main:null) (logid:) IO uring driver for Qemu: disabled
>> 2024-04-03 10:19:38,516 INFO [kvm.storage.KVMStoragePoolManager] 
>> (main:null) (logid:) adding storage adaptor for 
>> com.cloud.hypervisor.kvm.storage.LinstorStorageAdaptor
>> 2024-04-03 10:19:38,520 INFO [kvm.storage.KVMStoragePoolManager] 
>> (main:null) (logid:) adding storage adaptor for 
>> com.cloud.hypervisor.kvm.storage.StorPoolStorageAdaptor
>> 2024-04-03 10:19:38,521 WARN [kvm.storage.KVMStoragePoolManager] 
>> (main:null) (logid:) Duplicate StorageAdaptor type PowerFlex, not 
>> loading com.cloud.hypervisor.kvm.storage.ScaleIOStorageAdaptor
>>
>> ---
>>
>>
>> After this:
>>
>>> 2024-04-03 10:18:51,949 INFO [kvm.resource.LibvirtConnection] 
>>> (main:null) (logid:) No existing libvirtd connection found. Opening 
>>> a new one
>>
>> The disconnected host does not want to connect. While the other does.
>>
>> Can someone please assist with this, please? Both host have the 
>> following versions:
>>
>>> /usr/libexec/qemu-kvm --version
>>> QEMU emulator version 6.2.0 
>>> (qemu-kvm-6.2.0-40.module_el8.9.0+3714+46544554.2)
>>> Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers
>>
>>> libvirtd -v
>>> 2024-04-03 08:26:59.882+0000: 1939570: info : libvirt version: 
>>> 8.0.0, package: 22.module_el8.9.0+3714+46544554 (AlmaLinux Packaging 
>>> Team <pa...@almalinux.org>, 2024-01-15-11:34:31, )
>>
>> -- 
>> Regards / Groete
>>
>> <https://www.namhost.com>     Granwille Strauss  // Senior Systems Admin
>>
>> *e:* granwille@namhost.com
>> *m:* +264 81 323 1260 <tel:+264813231260>
>> *w:* www.namhost.com <https://www.namhost.com/>
>>
>> <https://www.facebook.com/namhost><https://twitter.com/namhost><https://www.instagram.com/namhostinternetservices/><https://www.linkedin.com/company/namhos><https://www.youtube.com/channel/UCTd5v-kVPaic_dguGur15AA> 
>>
>>
>> <https://www.adsigner.com/v1/l/631091998d4670001fe43ec2/621c9b76c140bb001ed0f818/banner> 
>>
>>
>> Namhost Internet Services (Pty) Ltd,
>> 24 Black Eagle Rd, Hermanus, 7210, RSA
>>
>>
>> The content of this message is confidential. If you have received it 
>> by mistake, please inform us by email reply and then delete the 
>> message. It is forbidden to copy, forward, or in any way reveal the 
>> contents of this message to anyone without our explicit consent. The 
>> integrity and security of this email cannot be guaranteed over the 
>> Internet. Therefore, the sender will not be held liable for any 
>> damage caused by the message. For our full privacy policy and 
>> disclaimers, please go to https://www.namhost.com/privacy-policy
>>
>> Powered by AdSigner 
>> <https://www.adsigner.com/v1/c/631091998d4670001fe43ec2/621c9b76c140bb001ed0f818>
-- 
Regards / Groete

<https://www.namhost.com> 	Granwille Strauss  // Senior Systems Admin

*e:* granwille@namhost.com
*m:* +264 81 323 1260 <tel:+264813231260>
*w:* www.namhost.com <https://www.namhost.com/>

<https://www.facebook.com/namhost><https://twitter.com/namhost><https://www.instagram.com/namhostinternetservices/><https://www.linkedin.com/company/namhos><https://www.youtube.com/channel/UCTd5v-kVPaic_dguGur15AA>

<https://www.adsigner.com/v1/l/631091998d4670001fe43ec2/621c9b76c140bb001ed0f818/banner>

Namhost Internet Services (Pty) Ltd,

24 Black Eagle Rd, Hermanus, 7210, RSA



The content of this message is confidential. If you have received it by 
mistake, please inform us by email reply and then delete the message. It 
is forbidden to copy, forward, or in any way reveal the contents of this 
message to anyone without our explicit consent. The integrity and 
security of this email cannot be guaranteed over the Internet. 
Therefore, the sender will not be held liable for any damage caused by 
the message. For our full privacy policy and disclaimers, please go to 
https://www.namhost.com/privacy-policy

Powered by AdSigner 
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Re: Upgrading to 4.19.0.1 and now host is disconnected

Posted by Mevludin Blazevic <mb...@uni-koblenz.de>.
Hi,

I had the same issue but with an earlier Cloudstack Version on some 
hosts, try to to do the following as described in this thread: 
https://www.mail-archive.com/search?l=users@cloudstack.apache.org&q=subject:%22uefi%22&o=newest&f=1

There are two main files which would need to be created/edited: 
/etc/cloudstack/agent/uefi.properties and /etc/libvirt/qemu.conf. After 
that, perform a restart of cloudstack-agent. In the database, you should 
see an entry in table host_details showing that this particular host has 
uefi enabled.

Best,

Mevludin

Am 03.04.2024 um 10:28 schrieb Granwille Strauss:
>
> Hi
>
> I have two Almalinux 8 hosts, both identically configured and uses 
> same package versions. I just upgraded to 4.19.0.1, as well as upgrade 
> cloudstack-agent accordingly. My one host now fails to connect and 
> remains in "Disconnected" state. While the other connects successfully.
>
> One the host that fails, the agent log shows this:
>
> ---
>
> 2024-04-03 10:18:51,616 INFO  [cloud.agent.AgentShell] (main:null) 
> (logid:) Agent started
> 2024-04-03 10:18:51,622 INFO  [cloud.agent.AgentShell] (main:null) 
> (logid:) Implementation Version is 4.19.0.1
> 2024-04-03 10:18:51,625 INFO  [cloud.agent.AgentShell] (main:null) 
> (logid:) agent.properties found at /etc/cloudstack/agent/agent.properties
> 2024-04-03 10:18:51,679 INFO  [cloud.agent.AgentShell] (main:null) 
> (logid:) Defaulting to using properties file for storage
> 2024-04-03 10:18:51,681 INFO  [cloud.agent.AgentShell] (main:null) 
> (logid:) Defaulting to the constant time backoff algorithm
> 2024-04-03 10:18:51,745 INFO  [cloud.utils.LogUtils] (main:null) 
> (logid:) log4j configuration found at 
> /etc/cloudstack/agent/log4j-cloud.xml
> 2024-04-03 10:18:51,745 INFO  [cloud.agent.AgentShell] (main:null) 
> (logid:) Using default Java settings for IPv6 preference for agent 
> connection
> 2024-04-03 10:18:51,853 INFO  [cloud.agent.Agent] (main:null) (logid:) 
> id is 36
> 2024-04-03 10:18:51,868 ERROR [kvm.resource.LibvirtComputingResource] 
> (main:null) (logid:) uefi properties file not found due to: Unable to 
> find file uefi.properties.
> 2024-04-03 10:18:51,949 INFO  [kvm.resource.LibvirtConnection] 
> (main:null) (logid:) No existing libvirtd connection found. Opening a 
> new one
>
> ---
>
> And the log just remains stuck there.
>
> One the connected host it shows:
>
> ---
>
> 2024-04-03 10:19:37,769 INFO  [cloud.agent.AgentShell] (main:null) 
> (logid:) Agent started
> 2024-04-03 10:19:37,775 INFO  [cloud.agent.AgentShell] (main:null) 
> (logid:) Implementation Version is 4.19.0.1
> 2024-04-03 10:19:37,778 INFO  [cloud.agent.AgentShell] (main:null) 
> (logid:) agent.properties found at /etc/cloudstack/agent/agent.properties
> 2024-04-03 10:19:37,858 INFO  [cloud.agent.AgentShell] (main:null) 
> (logid:) Defaulting to using properties file for storage
> 2024-04-03 10:19:37,860 INFO  [cloud.agent.AgentShell] (main:null) 
> (logid:) Defaulting to the constant time backoff algorithm
> 2024-04-03 10:19:37,926 INFO  [cloud.utils.LogUtils] (main:null) 
> (logid:) log4j configuration found at 
> /etc/cloudstack/agent/log4j-cloud.xml
> 2024-04-03 10:19:37,926 INFO  [cloud.agent.AgentShell] (main:null) 
> (logid:) Using default Java settings for IPv6 preference for agent 
> connection
> 2024-04-03 10:19:38,038 INFO  [cloud.agent.Agent] (main:null) (logid:) 
> id is 44
> 2024-04-03 10:19:38,055 ERROR [kvm.resource.LibvirtComputingResource] 
> (main:null) (logid:) uefi properties file not found due to: Unable to 
> find file uefi.properties.
> 2024-04-03 10:19:38,130 INFO  [kvm.resource.LibvirtConnection] 
> (main:null) (logid:) No existing libvirtd connection found. Opening a 
> new one
> 2024-04-03 10:19:38,389 WARN [kvm.resource.LibvirtComputingResource] 
> (main:null) (logid:) Execution of process [1880112] for command 
> [/bin/bash -c ldd /usr/libexec/qemu-kvm | grep -Eqe 
> '[[:space:]]liburing\.so' ] failed.
> 2024-04-03 10:19:38,390 WARN [kvm.resource.LibvirtComputingResource] 
> (main:null) (logid:) Process [1880112] for command [/bin/bash -c ldd 
> /usr/libexec/qemu-kvm | grep -Eqe '[[:space:]]liburing\.so' ] 
> encountered the error: [].
> 2024-04-03 10:19:38,391 INFO [kvm.resource.LibvirtComputingResource] 
> (main:null) (logid:) IO uring driver for Qemu: disabled
> 2024-04-03 10:19:38,516 INFO [kvm.storage.KVMStoragePoolManager] 
> (main:null) (logid:) adding storage adaptor for 
> com.cloud.hypervisor.kvm.storage.LinstorStorageAdaptor
> 2024-04-03 10:19:38,520 INFO [kvm.storage.KVMStoragePoolManager] 
> (main:null) (logid:) adding storage adaptor for 
> com.cloud.hypervisor.kvm.storage.StorPoolStorageAdaptor
> 2024-04-03 10:19:38,521 WARN [kvm.storage.KVMStoragePoolManager] 
> (main:null) (logid:) Duplicate StorageAdaptor type PowerFlex, not 
> loading com.cloud.hypervisor.kvm.storage.ScaleIOStorageAdaptor
>
> ---
>
>
> After this:
>
>> 2024-04-03 10:18:51,949 INFO  [kvm.resource.LibvirtConnection] 
>> (main:null) (logid:) No existing libvirtd connection found. Opening a 
>> new one
>
> The disconnected host does not want to connect. While the other does.
>
> Can someone please assist with this, please? Both host have the 
> following versions:
>
>> /usr/libexec/qemu-kvm --version
>> QEMU emulator version 6.2.0 
>> (qemu-kvm-6.2.0-40.module_el8.9.0+3714+46544554.2)
>> Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers
>
>> libvirtd -v
>> 2024-04-03 08:26:59.882+0000: 1939570: info : libvirt version: 8.0.0, 
>> package: 22.module_el8.9.0+3714+46544554 (AlmaLinux Packaging Team 
>> <pa...@almalinux.org>, 2024-01-15-11:34:31, )
>
> -- 
> Regards / Groete
>
> <https://www.namhost.com> 	Granwille Strauss  // Senior Systems Admin
>
> *e:* granwille@namhost.com
> *m:* +264 81 323 1260 <tel:+264813231260>
> *w:* www.namhost.com <https://www.namhost.com/>
>
> <https://www.facebook.com/namhost><https://twitter.com/namhost><https://www.instagram.com/namhostinternetservices/><https://www.linkedin.com/company/namhos><https://www.youtube.com/channel/UCTd5v-kVPaic_dguGur15AA>
>
> <https://www.adsigner.com/v1/l/631091998d4670001fe43ec2/621c9b76c140bb001ed0f818/banner>
>
> Namhost Internet Services (Pty) Ltd,
> 24 Black Eagle Rd, Hermanus, 7210, RSA
>
>
> The content of this message is confidential. If you have received it 
> by mistake, please inform us by email reply and then delete the 
> message. It is forbidden to copy, forward, or in any way reveal the 
> contents of this message to anyone without our explicit consent. The 
> integrity and security of this email cannot be guaranteed over the 
> Internet. Therefore, the sender will not be held liable for any damage 
> caused by the message. For our full privacy policy and disclaimers, 
> please go to https://www.namhost.com/privacy-policy
>
> Powered by AdSigner 
> <https://www.adsigner.com/v1/c/631091998d4670001fe43ec2/621c9b76c140bb001ed0f818>
-- 

---

Mevludin Blazevic, M.Sc.
Research Assistant / Cloud Administrator

University of Koblenz
Center for Information and Media Technologies (CIMT)
Research Group Information Systems and Smart Data
Universitätsstr. 1 | 56070 Koblenz | Germany

P: +49 261 287 1326
M: mblazevic@uni-koblenz.de <mailto:%7B%7B%20email%20%7D%7D>
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