
Data Ontap Simulator 8 2017
If you want to upgrade to a Data ONTAP 8.2.x release from a release earlier than 8.1.x, you must. Perform an intermediate upgrade (also known as a multi-hop upgrade) to the latest Data ONTAP. 8.1.x release before upgrading to the target 8.2.x release. It to learn NetApp ONTAP and become a. October 29, 2017. Where to find all the software for free, how to build the NetApp simulators, the Windows and Linux clients, the VMware. July 8, 2018.
We recently published a post which described how to integrate NFS storage from clustered Data ONTAP into the Kubernetes persistent storage paradigm. This post expands on that by using clustered Data ONTAP to present iSCSI storage to the Kubernetes cluster for use by applications.
The Kubernetes PersistentVolume API provides several plugins for integrating your storage into Kubernetes for containers to consume. In this post, we’ll focus on how to use the iSCSI plugin with ONTAP. If you are interested in NFS, please see this post. Once again, we will be using a modified version of the NFS example from Kubernetes’ documentation.
Environment
- ONTAP – For this post, a single node clustered Data ONTAP 8.3 simulator was used. The setup and commands used are no different than what would be used in a production setup using real hardware.
- Kubernetes – In this setup, Kubernetes 1.2.2 was used in a single master and single node setup running on VirtualBox using Vagrant. For tutorials on how to run Kubernetes in nearly any configuration and on any platform you can imagine, check out the Kubernetes Getting Started guides.
Clustered Data ONTAP Setup
The setup for ONTAP consists of the following steps.
- Create a Storage Virtual Machine (SVM) to host your iSCSI volumes
- Enable iSCSI for the SVM created
- Create a data LIF for Kubernetes to use
- Create an initiator group
- Add the Kubernetes host(s) to the initiator group
- Create a volume for iSCSI LUNs
- Create an iSCSI LUN for Kubernetes to use
- Map the iSCSI LUN to the initiator group
Of course you can skip some of these steps if you already have what you need there.
Here is an example that follows these steps:
- Create a Storage Virtual Machine (SVM) to host your iSCSI volumes
- Enable iSCSI for the SVM created
- Create a data LIF for Kubernetes to useThe values specified in this example is specific to our ONTAP simulator. Update
the appropriate values to match your environment. - Create an initiator group
- Add the Kubernetes host(s) to the initiator groupFor each node in our Kubernetes cluster, we need to add it’s `InitiatorName` to the `igroup`. The initiator name can be found in the file `/etc/iscsi/initiatorname.iscsi`. If this file does not exist, it’s likely that the iSCSI utilities have not been installed. See the [Kubernetes setup](#kubernetes) section for how to do this.
In our setup, the `InitiatorName` is `iqn.1994-05.com.redhat:27cc6d4e6da`. Download epic privacy browser for android. Update the appropriate values to match your environment.
- Create a volume for iSCSI LUNs
- Create an iSCSI LUN for Kubernetes to use
- Map the iSCSI LUN to the initiator group
- Now that you have an iSCSI LUN to use in Kubernetes, we need to get the IQN of our SVM because we’ll need it in the later steps when using the storage in Kubernetes.Run the following command and take note of the **Target Name**. In our example below, that value is `iqn.1992-08.com.netapp:sn.7dcf3853018611e6a3590800278b2267:vs.2`.
Kubernetes
To start, we need to install the needed iSCSI utilities on our Kubernetes nodes.
In our setup, the Vagrant box is using Fedora 23. The package to install is iscsi-initiator-utils. Install the appropriate package for the OS running on your Kubernetes nodes.
License.key.watch.dogs.txt download. In our example, we do not setup any authentication for the iSCSI LUN we created, but if we had, we would need to also edit /etc/iscsi/iscsid.conf to match the configuration.
- Next, we need to let Kubernetes know about our iSCSI LUN. To do this, we will create a `PersistentVolume` and a `PersistentVolumeClaim`.Create a `PersistentVolume` definition and save it as `iscsi-pv.yaml`.
- Then create a `PersistentVolumeClaim` that uses the `PersistentVolume` and save it as `iscsi-pvc.yaml`.
- Now that we have a `PersistentVolume` definition and a `PersistentVolumeClaim` definition, we need to create them in Kubernetes.
Creating an application which uses persistent storage
At this point, we can spin up a container that uses the PersistentVolumeClaim we just created.
- First, we’ll setup a pod that we can use to write to an `output.txt` file the current time and hostname of the pod.Save the pod definition as `iscsi-busybox.yaml`.
- Create the pod in Kubernetes.
- Now that we’ve created our pod with the iSCSI volume attached, we can write data to the volume to verify that everything is working as expected.
As you can see, we have output the current date and time to `output.txt`.
- Next, we’ll stop this instance of the pod and create a new one and verify that our data is still there.
Summary
The example shows that when we made a request to nginx, the last pod to have updated the index.html file was at Mon Apr 18 16:59:55 UTC 2016.
Using containers and Kubernetes for your application doesn’t change the need for persistent storage. Applications still need to access and process information to be valuable to the business. Using iSCSI storage is a convenient and easy way to supply capacity for applications using familiar technology.
If you have any questions about Kubernetes, containers, Docker, or NetApp’s integration, please leave a comment or reach out to us at opensource@netapp.com! We would love to hear your thoughts!
Data Ontap Simulator 8 2017
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When attempting to update the image for the simulator using the following command: cluster:>>system node image update -node * -package -replace image2 I get the following error and don't know what needs tweaking. Error; command failed on node: install Failed. Cannot update or install image because the system management storage area is almost out of space. To make space available, delete old Snapshot copies. For further assistance, contact technical support. What do I need to adjust to get this updated sim image installed?
The root aggrs on the 2 nodes have 10GB free currently. Any help or guidance appreciated. Well, I spoke too soon Turns out one of my nodes was able to download the 9.1 image successfully through option 7, but not the other. Really wierd.
So I have poked around and in the /cfcard directory (via systemshell) there is an env directory that holds an env file. There is one particular bootarg that seems to get set when invoking Option 7: setenv bootarg.install.ramdisksize '512M' I don't know enough about the sim to know how this comes into play, but I'm guessing this is used to create an area where the new image can be downloaded from my http server. The reason I think so is, using HFS, I can see the node get about 65% through downloading the image when it fails due to the /mnt filesystem being full. That is right at 512MBs of data having been transferred when it barfs.
The actual 91_q_image.tgz is 777MB. I tried editing this to create a larger RAM disk, but the value was changed back somewhere in the sequence to 512M, as it failed again at the exact same point. My /cfcard filesystem has 1.4GBs free and the 9.1 image is only 374MBs on the node where it successfully downloaded.
I've looked for differences in the various filesystems (again via systemshell) and there just isn't anything significant. All very minor.
BTW, i tried an 8.3.2 image and got the same results. It also exceeded 512M. As it is 527M, Anyone have any ideas as to what may be going on here? Really odd that my other node had no issue with Option 7.
By now, we should have our NetApp Data ONTAP appliance deployed and configured, an NFS volume created with an export policy, and the volume configured as a new datastore in vSphere. Now we’ll have a look at how you can start leveraging the snapshot technology of ONTAP by integrating it with Veeam. Here I’ll be using Veeam Backup and Replication v9.5. This is one part of a seven part series – links to the other parts can be found at the bottom of the page. Before proceeding to this stage I have built a Windows Server 2016 VM on the new NFS volume. Later we’ll be able to see how this VM will be associated with the ONTAP snapshots of this volume. First we’ll need to login to the Veeam console and go to the Storage Infrastructure section.
Click on ADD STORAGE: Click on NETAPP DATA ONTAP: The New NetApp Storage wizard will launch. Enter the IP Address of the cluster management port (we configured this in ). Click Next: Now we’ll need to provide some credentials that Veeam can use to talk to the ONTAP appliance. Click Add and type in the Data ONTAP admin credentials. Click OK and then click Next: Select Protocols to use. Since this is a virtual appliance and can only use IP-based storage protocols, we have selected the NFS and iSCSI protocols. Click Next: Review the Summary page. Once we are happy with our settings we can click Finish: A storage discovery job will start.