![]() it should not matter what Node a Pod is running on. This is because workers should be interchangeable in Kubernetes. You may notice that we didn’t mention backing up worker Nodes in the previous section. We will focus mostly on the first point in this post: backing up and restoring a control plane Node. But here we are talking about only the workload, which should be able to run on any (similar) cluster. In the previous case the backup was heavily tied to a specific cluster exactly because it was supposed to restore that same cluster. Note that there is a difference here in that these resources should be completely cluster agnostic. This requires backups of all the resources in the cluster, along with any state stored in persistent volumes. The second point in the list is relevant for restoring/migrating the workload to a new cluster or restoring a single failed application. And this is of course especially important if you run a cluster with just a single control plane Node. In other words, you need to make backups for the reason of restoring a control plane Node, or be forced to migrate to a new cluster if this happens. But this isn’t very helpful unless you are able to restore the control plane later. That is, unless the workload needs to talk to the API, of course. To be able to restore applications (with data).Īs you may know, the workload will happily keep running even if the control plane goes down.To be able to restore a failed control plane Node.There are essentially two reasons for backing up: Isn’t it all about stateless applications that you can easily redeploy on any other cluster? Well state is still quite useful or even necessary, besides, avoiding downtime (due to migration) is still a thing for stateless applications. Some may even wonder if backups are needed at all in Kubernetes. ![]() This may seem like a silly question but it is quite important to know what the backup is for before you decide on how to do it. It was closed in the summer 2020 without a fix due to the complexity of the topic. When I first wrote this post I referred to this issue about how to do Kubernetes backups and migrations from 2016. But it is hard to find anything putting the pieces together. There are pages pointing out that you should do backups, some references to solutions like Velero and descriptions for how to back up etcd. Unfortunately, many of them do not explain the big picture. When using file:// the file contents will need to properly formatted for the configured cli-binary-format.Īutomatically prompt for CLI input parameters.ĭisable automatically prompt for CLI input parameters.If you search for “backup Kubernetes” on google you will probably find quite a lot of different solutions. When providing contents from a file that map to a binary blob fileb:// will always be treated as binary and use the file contents directly regardless of the cli-binary-format setting. The raw-in-base64-out format preserves compatibility with AWS CLI V1 behavior and binary values must be passed literally. The base64 format expects binary blobs to be provided as a base64 encoded string. The formatting style to be used for binary blobs. If the value is set to 0, the socket connect will be blocking and not timeout. The maximum socket connect time in seconds. If the value is set to 0, the socket read will be blocking and not timeout. The CA certificate bundle to use when verifying SSL certificates. Credentials will not be loaded if this argument is provided. Overrides config/env settings.ĭo not sign requests. Use a specific profile from your credential file. This option overrides the default behavior of verifying SSL certificates.Ī JMESPath query to use in filtering the response data. ![]() For each SSL connection, the AWS CLI will verify SSL certificates. Override command’s default URL with the given URL.īy default, the AWS CLI uses SSL when communicating with AWS services. The generated JSON skeleton is not stable between versions of the AWS CLI and there are no backwards compatibility guarantees in the JSON skeleton generated. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command. Similarly, if provided yaml-input it will print a sample input YAML that can be used with -cli-input-yaml. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for -cli-input-json. Prints a JSON skeleton to standard output without sending an API request. Do not use the NextToken response element directly outside of the AWS CLI.įor usage examples, see Pagination in the AWS Command Line Interface User Guide. To resume pagination, provide the NextToken value in the starting-token argument of a subsequent command. If the total number of items available is more than the value specified, a NextToken is provided in the command’s output. ![]() The total number of items to return in the command’s output. ![]()
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