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158 lines
6.6 KiB
Markdown
158 lines
6.6 KiB
Markdown
# AWS specific configuration options
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These options can be set as environment variables to customize how your cluster is created. Only options
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specific to AWS are documented here, for cross-provider options see [this document](../options.md).
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This is a work-in-progress; not all options are documented yet!
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**KUBE_AWS_ZONE**
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The AWS availability zone to deploy to. Defaults to us-west-2a.
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**AWS_IMAGE**
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The AMI to use. If not specified, the image will be selected based on the AWS region.
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**AWS_S3_BUCKET**, **AWS_S3_REGION**
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The bucket name to use, and the region where the bucket should be created, or where the bucket is located if it exists already.
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If not specified, defaults to AWS_S3_REGION us-east-1, because buckets are globally named and you probably
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want to share a bucket across all regions; us-east-1 is a sensible (relatively arbitrary) default.
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AWS_S3_BUCKET will default to a uniquely generated name, so you won't collide with other kubernetes users.
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(Currently this uses the hash of your AWS Access key to produce a per-user unique value).
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It is not a bad idea to set AWS_S3_BUCKET to something more human friendly.
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AWS_S3_REGION is useful for people that want to control their data location, because of regulatory restrictions for example.
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**MASTER_SIZE**, **NODE_SIZE**
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The instance type to use for creating the master/minion. Defaults to auto-sizing based on the number of nodes (see below).
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For production usage, we recommend bigger instances, for example:
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```
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export MASTER_SIZE=c4.large
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export NODE_SIZE=r3.large
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```
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If you don't specify master and minion sizes, the scripts will attempt to guess the correct size of the master and worker
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nodes based on `${NUM_NODES}`. See [Getting started on AWS EC2](../../docs/getting-started-guides/aws.md) for details.
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Please note: `kube-up` utilizes ephemeral storage available on instances for docker storage. EBS-only instance types do not
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support ephemeral storage and will default to docker storage on the root disk which is usually only 8GB.
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EBS-only instance types include `t2`, `c4`, and `m4`.
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**KUBE_ENABLE_NODE_PUBLIC_IP**
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Should a public IP automatically assigned to the minions? "true" or "false"
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Defaults to: "true"
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Please note: Do not set this to "false" unless you...
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- ... already configured a NAT instance in the kubernetes VPC that will enable internet access for the new minions
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- ... already configured a route for "0.0.0.0/0" to this NAT instance
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- ... already configured a route for "YOUR_IP/32" to an AWS internet gateway (for the master instance to reach your
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client directly during setup)
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**DOCKER_STORAGE**
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Choose the docker storage driver to use. This is an advanced option; most people should leave it as the default aufs
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for parity with GCE.
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Supported values: btrfs, aufs, devicemapper, aufs-nolvm
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This will also configure your ephemeral storage in a compatible way, and your Docker containers
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will run on this storage if available, as typically the root disk is comparatively small.
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* `btrfs` will combine your ephemeral disks into a btrfs volume. This is a good option if you have a recent kernel
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with a reliable btrfs.
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* `aufs` uses the aufs driver, but also installs LVM to combine your disks. `aufs-nolvm` will not use LVM,
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meaning that only your first ephemeral disk will be used.
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* `devicemapper` sets up LVM across all your ephemeral disks and sets Docker to drive it directly. This is a
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similar option to btrfs, but without relying on the btrfs filesystem. Sadly, it does not work with most
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configurations - see [this docker bug](https://github.com/docker/docker/issues/4036)
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If your machines don't have any ephemeral disks, this will default to the aufs driver on your root disk (with no LVM).
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**KUBE_OS_DISTRIBUTION**
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The distribution to use. Defaults to `jessie`
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Supported options:
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* `jessie`: Debian Jessie, running a custom kubernetes-optimized image. Should
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be supported until 2018 by the debian-security team, and until 2020 by the
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debian-LTS team.
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* `wily`: Ubuntu Wily. Wily is not an LTS release, and OS support is due to
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end in July 2016.
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No longer supported as of 1.3:
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* `vivid`: Ubuntu Vivid. Vivid OS support ended in early February 2016.
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Docker no longer provides packages for vivid.
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Given the support situation, we recommend using Debian Jessie. In Kubernetes
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1.3 Ubuntu should have their next LTS release out, so we should be able to
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recommend Ubuntu again at that time.
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Using kube-up with other operating systems is neither supported nor
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recommended. But we would welcome increased OS support for kube-up, so please
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contribute!
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**NON_MASQUERADE_CIDR**
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The 'internal' IP range which Kubernetes will use, which will therefore not
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use IP masquerade. By default kubernetes runs an internal network for traffic
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between pods (and between pods and services), and by default this uses the
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`10.0.0.0/8` range. However, this sometimes overlaps with a range that you may
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want to use; in particular the range cannot be used with EC2 ClassicLink. You
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may also want to run kubernetes in an existing VPC where you have chosen a CIDR
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in the `10.0.0.0/8` range.
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Setting this flag allows you to change this internal network CIDR. Note that
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you must set other values consistently within the CIDR that you choose.
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For example, you might choose `172.16.0.0/14`; and you could then choose to
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configure like this:
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```
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export NON_MASQUERADE_CIDR="172.16.0.0/14"
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export SERVICE_CLUSTER_IP_RANGE="172.16.0.0/16"
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export DNS_SERVER_IP="172.16.0.10"
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export MASTER_IP_RANGE="172.17.0.0/24"
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export CLUSTER_IP_RANGE="172.18.0.0/16"
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```
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When choosing a CIDR in the 172.20/12 reserved range you should be careful not
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to choose a CIDR that overlaps your VPC CIDR (the kube-up script sets the VPC
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CIDR to 172.20.0.0/16 by default, so you should not overlap that). If you want
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to allow inter-VPC traffic you should be careful to avoid your other VPCs as
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well.
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There is also a 100.64/10 address block which is reserved for "Carrier Grade
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NAT", and which some users have reported success using. While we haven't seen
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any problems, or conflicts with any AWS networks, we can't guarantee it. If you
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decide you are comfortable using 100.64, you might use:
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```
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export NON_MASQUERADE_CIDR="100.64.0.0/10"
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export SERVICE_CLUSTER_IP_RANGE="100.64.0.0/16"
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export DNS_SERVER_IP="100.64.0.10"
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export MASTER_IP_RANGE="100.65.0.0/24"
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export CLUSTER_IP_RANGE="100.66.0.0/16"
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```
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**KUBE_VPC_CIDR_BASE**
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By default `kube-up.sh` will create a VPC with CIDR 172.20.0.0/16. `KUBE_VPC_CIDR_BASE` allows to configure
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this CIDR. For example you may choose to use `172.21.0.0/16`:
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```
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export KUBE_VPC_CIDR_BASE=172.21
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```
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[]()
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