user guide for euronas ha cluster r3 - storage software...

User Guide for euroNAS Software P a g e | 1

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User Guide for euroNAS HA Cluster R3

Rev. 2017-12-12

December 2017


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Contents


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euroNAS GmbH is a leading provider of advanced NAS and iSCSI operating systems. Founded

with the vision of providing state of the art, customized storage solutions to enterprises of

all sizes, euroNAS has helped businesses grow by providing maximum data security,

unbeatable savings and powerful features. Our goal is to be the technology leader in

storage solutions.

Some facts about us:

Founded in 2005 by some of the industry’s top NAS engineering talent with decades

of experience in the most demanding enterprise environments.

Number one choice for many data centers, IP surveillance companies and video

broadcasting companies, with thousands of installations worldwide serving petabytes

of storage.

One of the fastest growing companies in the NAS operating system marketplace.

If you’re running a virtualized environment or simply trying to meet the demands of the 24-

hour business cycle, you cannot afford downtime.

With euroNAS HA Cluster, you will get the highest level of redundancy, data security,

reliability and availability possible, even in the event of a complete server failure.

Our advanced technology creates a cluster of two mirrored servers with real time, continuous

data replication and synchronization. Should a hardware or software fault occur, it is

detected through intelligent features and the software automatically and immediately moves

storage requests to the other server mirrored in the cluster.

Unlike most storage solutions on the market, euroNAS storage software is not locked to

specific hardware, providing you the maximum flexibility in server selection and allows your

server to grow with your business.

euroNAS GmbH provides this publication “as is” without warranty of any kind, either

expressed or implied, including but not limited to the implied warranties of merchantability

or fitness for a particular purpose. euroNAS GmbH and its subsidiaries reserve the right to

revise this publication and to make changes to the content hereof without the obligation of

euroNAS GmbH to notify any person of such revision or changes.


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CONNECTING TO THE EURONAS SERVER FOR THE FIRST TIME

euroNAS is preset to acquire an IP address from a DHCP server. If you connect the monitor to

the server – the IP address will be shown. If no DHCP server is found on the network,

euroNAS will default to an IP address of 10.10.10.10 (first NIC) and 10.10.10.11 (second

NIC).

For accessing the administration interface enter the following URL into your internet

browser:

You can also connect to the server by using its default name. This procedure requires that

name resolution services (WINS or DNS) are installed in your network.

Alternatively you can connect keyboard and monitor on to your server and configure the IP

address manually.

1. Default name of the server is “euronas”.

Enter the following URL into your internet browser :

http://euronas:3733

2. Administration Interface will be opened .

Connect using the user name “admin” and default password “euronas”.

3. Configure the euroNAS Server

http://euronas:3733/


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SYSTEM INFO

Server name

Version

Time

Hardware information

Raid status

CPU usage

System memory

Swap partition

Network info with current transfer rate


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SYSTEM ADMINISTRATION

euroNAS needs to be activated before trial version expires. Serial number is generated out of

Hardware and is unique to this system. Please keep in mind that on certain hardware

changes this number will change and that a new activation code will be required. Grace

period is 7 days after which all services will be terminated on reboot. You can request a new

code by contacting [email protected] or [email protected] and providing the license

number and a new serial number.

Debug should be used only if advised by technical support

mailto:[email protected]

mailto:[email protected]


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All server settings (user, TCP/IP setting etc.) can be backed up in case of system failure.

NOTE: Even without these settings, new euroNAS installation will automatically import disks,

RAID, shares, iSCSI and FC targets

All server settings (user, TCP/IP setting etc.) can be recovered from the backup file. You can

select settings that you wish to recover individually

NOTE: Even without these settings, new euroNAS installation will automatically import disks,

RAID, shares, iSCSI and FC targets


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The following information will be shown:

Server name

OS version

Build

Installed CPU

CPU speed in MHz

Installed disks

Installed network/RAID/FC controllers


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euroNAS can be updated in a 3 different ways.

Online Update

Click on search – euroNAS will automatically look for an update file and perform update

Manual Update

Click on “I already have an update file” and upload the file using wizard

Update via Installation-CD

Download the latest ISO and boot of it – your existing installation will be recognized and

update will be offered.


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Date / Time

Time Zone

Time sync via Network Time Protocol (NTP)

Here you can change the password of a user.


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DATA MANAGEMENT – SHARE MANAGEMENT

Each share represents physical volume (partition) on that disk. If wished it is also possible to

share certain folders within that main share. Please beware that restricting access to

subfolder share does not mean that the user cannot access it through the main share. User

must be restricted within main share as well. Shares can be resized (made larger) or renamed

any time.

Shared drives are initialized drives or Raid arrays on which the shares and iSCSI Targets can

be created.

If the drive is not listed – check first under “Disk Management” – “Disk Info” if the drive is

listed there.

The following information is shown:

Full capacity

Available space for new shares

Created shares with their size


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USERS AND GROUPS

The euroNAS server can check the identity of users by using its internal user / password list.

This settings are only for accessing the web interface and SMB/CIFS cluster resource.

Default setting for new shares: everyone can access the shares. If you wish to limit this -

define at least one user under access management.

The euroNAS server has already some predefined user / group accounts.

Group membership can be changed for every user. Select option “Groups” in users list

Special characters are not allowed in user names

Duplicating Log-in Credentials for euroNAS and Windows or Macintosh Clients

You can simplify user access for Windows or Macintosh clients, by duplicating their log-in

credentials on the euroNAS server. This will help to bypass the log-in procedure when

accessing the server.

This is only valid for local users - not domain users


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NETWORK

Here you can see all the information about your network ports. If you click on configure you

can configure its TCP/IP settings.

Additionally to the local user / group authentication euroNAS can also authenticate users

using Windows Active Directory or Windows NT Domain services.

The following methods are supported:

Workgroup (local user / group authentication)

Windows Domain (Windows NT)

Active Directory Domain

In order to join the domain you must have an administrator account for this domain.


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NETWORK

IP address and subnet mask are necessary for the computer to communicate with other

computers.

If a data packet is to be sent to a computer outside of the local network, than this happens

via the gateway which also possesses a unique IP address.

The following settings can be configured via network card:

)

The following settings can be configured manually:

IP address

Subnet mask

Gateway

The network settings are getting provided by the DHCP server.


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NETWORK

DNS (Domain Name Service) converts an IP address into a computer name. You have to enter

the IP address of the server under which the service runs.

WINS converts specific Microsoft computer names into an IP address. You have to enter the IP

address of the server under which the service runs.

If no settings of DNS via DHCP are transmitted to the server or if the TCP/IP was configured

manually the DNS and/or WINS server can be entered here.

The WINS information cannot be fetched from the DHCP Server. If necessary this information

should always be set manually.

If there should be problems converting the names and/or if it is not possible to reach a

certain computer via its name, the IP address and the name can be entered manually.

The following information can be registered:

IP address of the computer

Host name (long) i.e. computer1.mydomain.local

Host name (short) i.e. computer1 (without domain)


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NETWORK

This option allows you to bundle several network cards in order to increase bandwidth

and/or redundancy (reliability).

euroNAS supports the following possibilities:

The network bandwidth increases by an equivalent of the factor two since several

network cards are sending data in a load balancing way.

The network bandwidth increases by the factor two since several network cards are

sending and receiving data in a load balancing way (switch support needed).

If one network card disconnects then the other network card takes over

automatically, and connected users continue to have access to the server without any

problems.

Ping is a computer network administration utility used to test the reachability of a host on an

Internet Protocol (IP) network. If a computer can be reached via its IP address only, then in

"Host Editor" you can link the IP address with the name.


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DRIVE MANAGEMENT

The following information can be seen:

Name of the drive

Manufacturer and model

Capacity in Megabyte

Membership in Raid

Initialization status

S.M.A.R.T. Status

Temperature

euroNAS software is compatible with all hard disks supporting ATA, S-SATA, SAS and Fibre

Channel.

S.M.A.R.T. allows you to access the status information of your hard disk – this also helps to

prevent hard disk failures.


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DRIVE MANAGEMENT

In order to create a share on a drive, it needs to be initialized.

It is important to note that after initialization any data - already on the drive - will be deleted

irrevocably.

With the start of the initialization a name will be assigned to the share drive. Now you can

create shares for this drive in the share management.

The actual status of the share can be also seen in the share management.

1. Select the drive

2. Enter the name of the share disk and decide how much space you wish to reserve

for snapshots (if you do not wish to use snapshots enter 0%)

3. Now you can create shares and iSCSI targets on the drive.


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HARDWARE RAID MANAGER

In addition to the software RAID euroNAS also supports many hardware Raid controllers.

Depending on controller model - hardware RAID manager can read the status, create RAID

and notify you via E-Mail in case of drive failure.

All supported hardware RAID controllers are recognized automatically, and the RAID

manager adjusts features depending of the controller.

An updated list of all currently supported controllers can be found on our website under

http://www.euronas.com/compatibility-hardware-raid-controller

http://www.euronas.com/compatibility-hardware-raid-controller


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SOFTWARE RAID

RAID connects several hard disks while being addressed like a single disk. The advantages

are the speed (RAID 0) and data security since the data is still readable if one hard disk fails

(RAID 1, 5 and 6).

euroNAS supports the hardware RAID controller (euroNAS Premium and HA Cluster) but also

includes powerfull integrated software RAID functionality.

Hardware RAID controllers (specially RAID 5/6 controller) are expensive.

Inexpensive RAID controllers often are only driver based RAID controllers – that

are not much different than a software RAID, consuming the CPU the same way.

Built-in software RAID helps reducing the total costs for the system and still

provides more than acceptable performance for many scenarios.

RAID-code is based on Linux RAID which is proven in millions of servers running

in many critical environments.

RAID monitoring service will inform you if one of the drive fails. All RAID related

events are logged.

Hard disks can be put into another system - another euroNAS installation will still

recognize them and address them correctly even if the disks are not put in the

same order as in original system.

Software Raid supports the following configurations: RAID 0, RAID 1, RAID 10,

RAID 5, RAID 6.

Software RAID can be expanded with additional drives.


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SOFTWARE RAID

The Raid array is easy to create:

1. Select the hard disks you wish to use.

2. Enter the name and type of the Raid array. Given name helps you to differentiate

disks and raid arrays in your system.

3. When RAID creation is finished you can use the new RAID disk as a normal disk

and create shares, iSCSI or Fibre Channel targets on the RAID drive.

4. RAID information allows you to see the status of the new RAID. This page

automatically refreshes the RAID state every 30 seconds.


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SOFTWARE RAID

Software RAID supports the following options:

speed and capacity

no data security – if one disk fails all data is lost

Data gets shared between several hard disks. This enhances the data in- and output rate. But

is also increases the risk of losing all data if one disk fails. This option is only recommended

if data is not important and you need maximal performance

Data security

50% capacity loss

Data gets mirrored on two hard disks – both hard disks contain identical data. If one disk

fails, data remains intact on the other disk.

It is possible to define a dedicated hotspare drive. If one hard disk fails in a RAID 1 array, the

spare drive will automatically take over and the RAID array will rebuild automatically.

Data security, capacity and speed (reading)

Slower at writing

Data together with parity information is spread over all hard disks.

If one hard disk fails the system can continue work normally and will automatically missing

information from failed drive out of the parity information.

The advantage is this security and capacity – at the costs of a lower write speed, since parity

calculation is computing intensive. This RAID still represents the best compromise between

cost, redundancy and access speed.

Most secure option – two hard disks can fail, still safe in rebuild mode, and fast

reading

Capacity of two hard disks gets lost


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SOFTWARE RAID

Data gets shared between at least four hard disks, and you obtain a failure security of up to

two hard disks. The system continues working even if up to two hard disks fail. Therefore

the advantage is high failure security and capacity – at the disadvantage of a lower access

rate, since sharing is very computing intense.

But an additional advantage compared to Raid 5 is that even in rebuild mode the Raid

compound is redundant and one more hard disk failure could be met.


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SNAPSHOTS

Snapshots are backups of data at a certain point in time. A backup is taken of data located

on shares. The backup is a complete copy of the secured shares, folders and files on a single

share on a drive at a certain point in time.

It generally takes a few seconds to take a snapshot.

In the case of lost or damaged data, you can refer to the backup in order to restore an earlier

version of the data.

Under access rights you can see who is eligible to accessing the snapshots.

If for example a snapshot is taken daily or once a week you have access to the data of the

last 30 days respectively 30 weeks.

After having defined the access rights for the snapshots, you can find the snapshots via

"Name_of_the_share_snap".

Each snapshot is listed as a single register with date and time of registration. Also you have

the possibility to revert whole snapshot to the volume by using the button revert (reboot

after this is necessary).

Snapshots can be timed or executed on demand. If access is permitted, the iSCSI snapshots

can be reached via the iSCSI initiator like any normal target.

Snapshots can be set to be taken at an exact time – for example on a selected day or hourly.


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SNAPSHOTS

Before you can use snapshots there must be a reserved snapshot space on that disk. For

taking a snapshot, an already existing data gets accessed while reading, and only the

changed blocks get copied into the reserved storage space. The more shares get changed

the more storage space is needed for the changes. euroNAS is calculating the needed

storage space for each snapshot by dividing the whole reserved storage space by the number

of allowed snapshots on the drive.


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HYBRID CACHE TIERING

Hybrid Storage Cache Tiering improves the performance of your storage server by

dynamically moving frequently used data to a faster, smaller device such an SSD.

This way you can build a hybrid storage server that will provide you with higher I/O

performance and larger capacity at the same time.

euroNAS analyses automatically incoming data transfer and moves blocks that are used more

often to the faster (SSD) disks. The longer the server is in use the more efficient your server

will become.

Please note that data blocks will be moved so SSD disks should also be kept redundant (RAID

Array).

For setting up a hybrid storage please go to “Storage Management” / “Cache Tiering”. From

there you can see the list of all drives.


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Choose a drive, which will be the main drive in the hybrid storage, and then select a drive,

which will be the cache drive by selecting the drive and clicking on “Set cache” button. Note

that the cache drive shouldn't have any shares or ISCSI/FC targets on it. On the picture below

main drive will be “sdc” and cache drive “sdd”.

Now go to “Details” for setting further options.


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Now you can decide how much cache space each individual share or target is allowed to use.

The “Write Back” option allows faster speeds but is risky in case of power failure. Per default

“Write Back” is disabled.

Stats button will show you current cache usage and detailed information.


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APC-UPS

UPS helps the server in case of power failure to shut down the system in a controlled way.

UPS service controls the UPS battery and automatically shuts down the system when it

reaches a critical status.

It is important to note that "battery level" and "remaining time" are both valid. The according

status that is reached first decides that the system is shut down. After having configured

UPS, check the status of the device – if you cannot see the status and/or the website is not

responding, the UPS service could not recognize the device.


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APC-UPS


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SERVICES

If you have set “E-Mail notification” than you will automatically receive an email if there

should be any problems whole running the device. The following notifications can be set:

Raid

UPS notification

Server synchronization reports

The following parameters need to be set:

SMTP server

Sender: an email account which is known to the SMTP server and/or which

gets accepted by the SMTP server

Receiver: Email address of the recipient to whom the email notification is to be

sent

User name (SMTP)

Password (SMTP)

You can monitor the server using 3rd

party SNMP tools

Monitoring service for APC UPS devices (USB / Network).


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EVENT LOGS

Event logs help you troubleshooting in case of problems. Especially when contacting

technical support it is very important to create and send support file as well. This file helps

us determining the problem and finding the solution much quicker


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STATISTICS

Under statistics you can see the server usage

.

You can see the following information:


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CLUSTER ADMINISTRATION

euroNAS HA Cluster software uses advanced technologies that synchronize the Data between

2 servers in real time.

Its intelligent services detect if one of the servers goes offline and takes over the services

and the network address of the failed server without requiring administrative intervention.

Users and Services that use the storage will continue to work normally.

Without clustering, if a storage server is down, the data and all related applications and

services will be unavailable until the server is back online

This benefit is not only for the failures and crashes that inevitably happen in the computer

world, but also for planned maintenance. A server in the cluster may be taken offline for

maintenance and brought back online without interrupting your users or customers

euroNAS Cluster uses automated tools that helps you configure it in few easy steps.

There must be one or more reliable IP Addresses on the Corporate Network that both servers

can reach for proper operation of the High-Availability/Custer features

An example would be the router which is on the Corporate Network or connects the servers

to the Corporate Network

For best performance and high availability the server should have 4 individual Network

Interface Cards with a minimum bandwidth of 1 Gigabit.

They should be configured as two separate bonded networks

One of the bonds should be connected to the Corporate Network

The other bond should be connected directly to the other server on a private Replication

Network

If the servers are in the same location they should be cabled directly to each other without

any switches between them if possible

For top performance the Replication Network should be 10 Gigabit

If dual-port cards are used each port on the card should be assigned to a separate bond so

that the failure of one card does not break the entire bond

Card 1 Port 1 -> bond0 (Corporate Network)

Card 1 Port 2 -> bond1 (Replication Network)

Card 2 Port 1 -> bond0 (Corporate Network)

Card 2 Port 2 -> bond1 (Replication Network)

Quad-port cards should be avoided

DHCP should not be used unless static leases are provided

Using DHCP without static leases will cause the cluster to fail when the IP addresses change


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Before cluster is created it is important to configure network settings and to initialize drive /

RAID.

Make sure that all NICs are configured prior creating cluster (later this IPs should not be

changed) - you need at least 2 NICs - one for internal communication (replication network)

and one for communication with network clients (corporate network).

Click here on "Create New Cluster"

Confirm the cluster creation


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Select here network cards that you wish to use and provide admin password of the other

server. Here you should also set "Network Test-IP" - this IP is used by cluster to find out if it

can reach the clients (it will ping them regularly). Ideally it should be more than one and

should be systems that are running 24/7 - for example your router, printer, other servers....


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Both servers will now build and optimize for cluster. This can take several minutes...

After the successful creation you can see the overview and that both servers can see and

communicate with each other


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Cluster is now ready and you can create a cluster drive.

HA Cluster R3 provides you with several different options for cluster drive creation. You can

select them depending on your license and requirements.


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This drive will be assigned to one of the servers.

If both servers are online selected server will be primary server for this drive - in case that

primary server goes offline - secondary server will take over.

You can also split the capacity and create more than one cluster drive and assign it to the

other server - in this case you can balance the server load between both servers and achieve

greater performance.

With the optional Active/Active license you also make both nodes active at the same time.

Both nodes will simultaneously provide iSCSI Targets to the clients. Clients will be able to

connect from both paths at the same. This way the failover time will be reduced to absolute

minimum (time that client needs to switch over to 2nd

path).

This mode should not be used for round robin or any port aggregation features on client

side. Its main purpose is reducing the failover time.


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Both Nodes share the same storage and can access it simultaneously. This can be SAS, FC or

iSCSI storage. euroNAS is ALUA/MPIO aware.

Active/Active and Active/Standby multipath connections are supported.

For shared SAS and Fibre Channel storage please select the option “Shared”, for shared

storage via iSCSI please select “iSCSI-Shared”

When using iSCSI-Shared, for multipath, you need to enter the IP addresses of all portals

(IP,IP2,IP3 etc.).

For SAS and Fibre Channel multipath is detected automatically. For FC ALUA is required.


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Now you can create resources on this drive. For this select tab option "Shares & iSCSI".

Following resource types are supported

iSCSI Target

iSCSI Target Lun

NFS Share

NFS / CIFS Share

CIFS / SMB Share with WORM and AUDIT support

CIFS / SMB Share with AFP and Spotlight support

You can define as many resources as you like - resource will be accessible via the IP Address

of the cluster drive. When enabling Spotlight it will keep the common database on the first

resource created


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Resource is now ready for use and you can reach it under its IP Address - list of resources

shows you their current state and server that they are currently running on. Also you can edit

resources

Depending on which IP and for which node the cluster drive resource is configured it will be

accessible through this IP Address and will be running on that node. In case that this node

fails, resource will automatically move to the functioning node and fail back as soon as the

failed node comes online and syncs its drives.


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When editing resources you will get more options for tunning your ressource

With NFS resource you can set which IP addresses are allowed to connect to this NFS share

and also the IP address from which this NFS share will be accessible from

Some clients such as KVM are creating sparse files - if your application does it you should

enable this setting


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iSCSI supports different types of access permissions. You can define which IP addresses are

allowed to connect to the target (for others this target will not be visible) or define

user/password authentication (CHAP authentication).


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This resource also supports local users and group authentication and authentication via

Active Directory domain.

Spotlight is only supported for AFP protocol and requires that database is saved on one of

the resources. If enabled all AFP resources must run on the same node.

Since resource can run on 2 different servers it is not recommended to use name resolution

for this resource or adding manually the IP Addresses to the DNS server.

WORM and FULL Audit functionality works only with CIFS. It can be defined which client

operations will be monitored and logged.

Sparse file support should be only used if required by the client (for example KVM) since it

can influence the performance.

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