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Tectonic ships with CoreOS's signature automated operations, runs multi-cloud, and is the fastest, most secure path to Kubernetes.

Terraform variables

This document gives an overview of variables used in all platforms of the Tectonic SDK.

Inputs

Name Description Type Default
tectonic_admin_email (internal) The e-mail address used to: 1. login as the admin user to the Tectonic Console. 2. generate DNS zones for some providers.

Note: This field MUST be in all lower-case e-mail address format and set manually prior to creating the cluster.		 string -
tectonic_admin_password (internal) The admin user password to login to the Tectonic Console.

Note: This field MUST be set manually prior to creating the cluster. Backslashes and double quotes must also be escaped.		 string -
tectonic_base_domain The base DNS domain of the cluster. It must NOT contain a trailing period. Some DNS providers will automatically add this if necessary.

Example: openstack.dev.coreos.systems.

Note: This field MUST be set manually prior to creating the cluster. This applies only to cloud platforms.

[Azure-specific NOTE] To use Azure-provided DNS, tectonic_base_domain should be set to "" If using DNS records, ensure that tectonic_base_domain is set to a properly configured external DNS zone. Instructions for configuring delegated domains for Azure DNS can be found here: https://docs.microsoft.com/en-us/azure/dns/dns-delegate-domain-azure-dns		 string -
tectonic_bootstrap_upgrade_cl (internal) Whether to trigger a ContainerLinux upgrade on node bootstrap. string true
tectonic_ca_cert (optional) The content of the PEM-encoded CA certificate, used to generate Tectonic Console's server certificate. If left blank, a CA certificate will be automatically generated. string ``
tectonic_ca_key (optional) The content of the PEM-encoded CA key, used to generate Tectonic Console's server certificate. This field is mandatory if tectonic_ca_cert is set. string ``
tectonic_ca_key_alg (optional) The algorithm used to generate tectonic_ca_key. The default value is currently recommended. This field is mandatory if tectonic_ca_cert is set. string RSA
tectonic_cluster_cidr (optional) This declares the IP range to assign Kubernetes pod IPs in CIDR notation. string 10.2.0.0/16
tectonic_cluster_name The name of the cluster. If used in a cloud-environment, this will be prepended to tectonic_base_domain resulting in the URL to the Tectonic console.

Note: This field MUST be set manually prior to creating the cluster. Warning: Special characters in the name like '.' may cause errors on OpenStack platforms due to resource name constraints.		 string -
tectonic_config_version (internal) This declares the version of the global configuration variables. It has no impact on generated assets but declares the version contract of the configuration. string 1.0
tectonic_container_base_images (internal) Base images of the components to use map <map>
tectonic_container_images (internal) Container images to use map <map>
tectonic_container_linux_channel (optional) The Container Linux update channel.

Examples: stable, beta, alpha		 string stable
tectonic_container_linux_version The Container Linux version to use. Set to latest to select the latest available version for the selected update channel.

Examples: latest, 1465.6.0		 string latest
tectonic_ddns_key_algorithm (optional) This only applies if you use the modules/dns/ddns module.

Specifies the RFC2136 Dynamic DNS server key algorithm.		 string ``
tectonic_ddns_key_name (optional) This only applies if you use the modules/dns/ddns module.

Specifies the RFC2136 Dynamic DNS server key name.		 string ``
tectonic_ddns_key_secret (optional) This only applies if you use the modules/dns/ddns module.

Specifies the RFC2136 Dynamic DNS server key secret.		 string ``
tectonic_ddns_server (optional) This only applies if you use the modules/dns/ddns module.

Specifies the RFC2136 Dynamic DNS server IP/host to register IP addresses to.		 string ``
tectonic_etcd_ca_cert_path (optional) The path of the file containing the CA certificate for TLS communication with etcd.

Note: This works only when used in conjunction with an external etcd cluster. If set, the variable tectonic_etcd_servers must also be set.		 string /dev/null
tectonic_etcd_client_cert_path (optional) The path of the file containing the client certificate for TLS communication with etcd.

Note: This works only when used in conjunction with an external etcd cluster. If set, the variables tectonic_etcd_servers, tectonic_etcd_ca_cert_path, and tectonic_etcd_client_key_path must also be set.		 string /dev/null
tectonic_etcd_client_key_path (optional) The path of the file containing the client key for TLS communication with etcd.

Note: This works only when used in conjunction with an external etcd cluster. If set, the variables tectonic_etcd_servers, tectonic_etcd_ca_cert_path, and tectonic_etcd_client_cert_path must also be set.		 string /dev/null
tectonic_etcd_count The number of etcd nodes to be created. If set to zero, the count of etcd nodes will be determined automatically.

Note: This is not supported on bare metal.		 string 0
tectonic_etcd_servers (optional) List of external etcd v3 servers to connect with (hostnames/IPs only). Needs to be set if using an external etcd cluster. Note: If this variable is defined, the installer will not create self-signed certs. To provide a CA certificate to trust the etcd servers, set "tectonic_etcd_ca_cert_path".

Example: ["etcd1", "etcd2", "etcd3"]		 list <list>
tectonic_etcd_tls_enabled (optional) If set to true, all etcd endpoints will be configured to use the "https" scheme.

Note: If tectonic_experimental is set to true this variable has no effect, because the experimental self-hosted etcd always uses TLS.		 string true
tectonic_experimental If set to true, experimental Tectonic assets are being deployed. string false
tectonic_image_re (internal) Regular expression used to extract repo and tag components string /^([^/]+/[^/]+/[^/]+):(.*)$/
tectonic_license_path The path to the tectonic licence file. You can download the Tectonic license file from your Account overview page at [1].

[1] https://account.coreos.com/overview

Note: This field MUST be set manually prior to creating the cluster unless tectonic_vanilla_k8s is set to true.		 string ``
tectonic_master_count The number of master nodes to be created. This applies only to cloud platforms. string 1
tectonic_networking (optional) Configures the network to be used in Tectonic. One of the following values can be used:

- "flannel": enables overlay networking only. This is implemented by flannel using VXLAN.

- "canal": [ALPHA] enables overlay networking including network policy. Overlay is implemented by flannel using VXLAN. Network policy is implemented by Calico.

- "calico": [ALPHA] enables BGP based networking. Routing and network policy is implemented by Calico. Note this has been tested on baremetal installations only.		 string flannel
tectonic_pull_secret_path The path the pull secret file in JSON format. This is known to be a "Docker pull secret" as produced by the docker login [1] command. A sample JSON content is shown in [2]. You can download the pull secret from your Account overview page at [3].

[1] https://docs.docker.com/engine/reference/commandline/login/

[2] https://coreos.com/os/docs/latest/registry-authentication.html#manual-registry-auth-setup

[3] https://account.coreos.com/overview

Note: This field MUST be set manually prior to creating the cluster unless tectonic_vanilla_k8s is set to true.		 string ``
tectonic_service_cidr (optional) This declares the IP range to assign Kubernetes service cluster IPs in CIDR notation. The maximum size of this IP range is /12 string 10.3.0.0/16
tectonic_stats_url (internal) The Tectonic statistics collection URL to which to report. string https://stats-collector.tectonic.com
tectonic_update_app_id (internal) The Tectonic Omaha update App ID string 6bc7b986-4654-4a0f-94b3-84ce6feb1db4
tectonic_update_channel (internal) The Tectonic Omaha update channel string tectonic-1.7-production
tectonic_update_server (internal) The URL of the Tectonic Omaha update server string https://tectonic.update.core-os.net
tectonic_vanilla_k8s If set to true, a vanilla Kubernetes cluster will be deployed, omitting any Tectonic assets. string false
tectonic_versions (internal) Versions of the components to use map <map>
tectonic_worker_count The number of worker nodes to be created. This applies only to cloud platforms. string 3

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