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create_aladdin_configuration.md

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Creating Aladdin Configuration

Create a new folder for your configuration files. We recommend you call it something like aladdin-config, and put it under source control. There is an example of this configuration in the config-example folder.

Directory Structure

aladdin-config/
  config.json
  default/
    config.json
  minikube/
    config.json
    env.sh
  REMOTE-CLUSTER-1/
    config.json
    env.sh
  REMOTE-CLUSTER-2/
    config.json
    env.sh
    namespace-overrides/
      test/
        config.json

Root config.json file

The config.json file in the root of your config directory will contain non cluster-specific configuration for your aladdin installation. Here is the config.json file from the config-example folder:

{
    "aladdin": {
      "repo": "fivestarsos/aladdin",
      "tag": "1.0.0"
    },
    "cluster_aliases": {
        "DEV": "CLUSTERDEV",
        "PROD": "CLUSTERPROD"
    },
    "git": {
        "account": "fivestars-os"
    },
    "kubernetes": {
        "label": "app"
    },
    "publish": {
        "aws_profile": "abcdefgh",
        "docker_ecr_repo": "xxxxxxxxxxxx.dkr.ecr.us-east-1.amazonaws.com/",
        "s3_helm_chart_bucket": "helm-charts-xxxxxxxxxxxxxx"
    }
}
  • Aladdin section:
    • repo: which repo to pull aladdin from. You can change this to your internal repo if you plan on creating a custom aladdin docker image and plan on pushing it there.
    • tag: which tag of the aladdin docker image to pull
    • repo_login_command: If you plan on extending aladdin, you may need to fill this in with your internal repo's login command
  • Cluster Aliases section:
    • When invoking aladdin, you can pass in the -c/--cluster flag to specify a cluster. Here you can add aliases for that cluster option (i.e. specify -c DEV rather than -c CLUSTERDEV in this example)
  • Git section
    • account: which git account to pull from. Aladdin mounts your git credentials onto the aladdin container when you call aladdin.
  • Kubernetes section:
    • label: which label to use when filter kubernetes resources. Several aladdin commands use this label to specify which exact resource to modify.
  • Publish section:
    • aws_profile: which aws profile to publish your docker image and helm charts to
    • docker_ecr_repo: the ecr path of your aws profile, used to push your docker images to
    • s3_helm_chart_bucket: which bucket to store your packaged helm charts to

Cluster env.sh file

The env.sh file in each of your subdirectories in your config folder will contain cluster-specific variables that aladdin sources. These variables are mainly used to create your cluster and to get the correct configuration. Here is the example env.sh file from the CLUSTERDEV folder.

#!/bin/bash
export CLOUD=aws
export KUBERNETES_VERSION=v1.8.6

export MASTER_SIZE=t2.large
export MASTER_COUNT=3
export MASTER_ZONES=us-east-1a,us-east-1c,us-east-1e

export NODE_SIZE=r4.x2large
export NODE_COUNT=2
# to find valid availability zones, use following command
# aws ec2 describe-availability-zones
export ZONES=us-east-1a,us-east-1c,us-east-1d,us-east-1e

export DNS_ZONE=
export CLUSTER_NAME=$DNS_ZONE
export KOPS_STATE_STORE=s3://$DNS_ZONE

export VPC=
export NETWORK_CIDR=

export AWS_DEFAULT_REGION=us-east-1
export AWS_DEFAULT_PROFILE=

export AUTHORIZATION=
export CLOUD_LABELS=
export ADMIN_ACCESS=

export IMAGE=

Most these variables are just used by kops when creating the cluster, which is wrapped by aladdin. If you need more info, check here. Note that the env.sh in your minikube folder will be mostly empty since you are not actually creating a cluster in that scenario.

Cluster config.json file

The config.json file in each of your subdirectories in your config folder will contain cluster-specific configuration for your aladdin installation. Here is an example config.json file for a specific cluster:

{
    "aws_profile": "abcdefgh",
    "cluster_name": "CLUSTERDEV",
    "root_dns": "clusterdev.exampledev.info",
    "service_dns_suffix": "exampletest.com",
    "values": {
        "service.publicServiceType": "LoadBalancer",
        "service.privateServiceType": "ClusterIP",
        "deploy.imagePullPolicy": "Always"
    },
    "allowed_namespaces": [
        "default", "kube-system"
    ],
    "cluster_init": [
        {"project": "dashboard", "ref": "v1.0.0", "namespace": "kube-system"}
    ],
    "dual_dns_prefix_annotation_name": "dns-name"
}
  • aws_profile section: which aws profile you are interacting with for the cluster
  • cluster_name section: the name of your cluster. This will match the name of the subdirectory in most cases.
  • root_dns section: the dns for your cluster. This should match the DNS_ZONE from your env.sh file in most cases. This is used by aladdin when it maps dns for each of your externally accessible services.
  • service_dns_suffix section: aladdin maps your services to {service name}.{namespace}.{root_dns}, and thus, will request a certificate for *.{namespace}.{root_dns}. By setting this, it will instead request a certificate for *.{service_dns_suffix}. Note that you will still need manually to map your service from {service name}.{service_dns_suffix} to {service name}.{namespace}.{root_dns}.
  • values section: which values to set for all helm charts in this cluster when running aladdin deploy or aladdin start
  • allowed_namespaces section: which namespaces you are allowed to interact with in this cluster
  • check_branch section (not shown in example): which branch on your remote repo to check against before deploying (e.g. set this to master for your production cluster)
  • cluster_init section: which projects to install when running aladdin cluster init. You must specify the project, ref, and namespace.
  • namespace_init section (not shown in example): whenever a namespace is created, install any projects in this section. You must specify a project and a ref.
  • dual_dns_prefix_annotation_name section: you can use this annotation (in this example, it is "dns-name") in your service.yaml files to change the prefix for the dns your service is mapped to

Note: Aladdin also supports a default/ folder which can have a config.json file that other clusters will inherit from.

Note: Aladdin allows you to override configuration on a namespace level as well. To do this, create a namespace-overrides folder in your cluster subdirectory folder, and create a folder for each namespace you want to override config for. Then create a config.json file with any overrides. See the config-example/CLUSTERDEV/namespace-overrides/test/config.json file for an example.