job "${job_name}" { # The "region" parameter specifies the region in which to execute the job. # If omitted, this inherits the default region name of "global". # region = "${region}" # The "datacenters" parameter specifies the list of datacenters which should # be considered when placing this task. This must be provided. datacenters = "${datacenters}" # The "type" parameter controls the type of job, which impacts the scheduler's # decision on placement. This configuration is optional and defaults to # "service". For a full list of job types and their differences, please see # the online documentation. # # https://www.nomadproject.io/docs/jobspec/schedulers # type = "service" update { # The "max_parallel" parameter specifies the maximum number of updates to # perform in parallel. In this case, this specifies to update a single task # at a time. max_parallel = ${max_parallel} health_check = "checks" # The "min_healthy_time" parameter specifies the minimum time the allocation # must be in the healthy state before it is marked as healthy and unblocks # further allocations from being updated. min_healthy_time = "10s" # The "healthy_deadline" parameter specifies the deadline in which the # allocation must be marked as healthy after which the allocation is # automatically transitioned to unhealthy. Transitioning to unhealthy will # fail the deployment and potentially roll back the job if "auto_revert" is # set to true. healthy_deadline = "3m" # The "progress_deadline" parameter specifies the deadline in which an # allocation must be marked as healthy. The deadline begins when the first # allocation for the deployment is created and is reset whenever an allocation # as part of the deployment transitions to a healthy state. If no allocation # transitions to the healthy state before the progress deadline, the # deployment is marked as failed. progress_deadline = "10m" %{ if use_canary } # The "canary" parameter specifies that changes to the job that would result # in destructive updates should create the specified number of canaries # without stopping any previous allocations. Once the operator determines the # canaries are healthy, they can be promoted which unblocks a rolling update # of the remaining allocations at a rate of "max_parallel". # # Further, setting "canary" equal to the count of the task group allows # blue/green deployments. When the job is updated, a full set of the new # version is deployed and upon promotion the old version is stopped. canary = ${canary} # Specifies if the job should auto-promote to the canary version when all # canaries become healthy during a deployment. Defaults to false which means # canaries must be manually updated with the nomad deployment promote # command. auto_promote = ${auto_promote} # The "auto_revert" parameter specifies if the job should auto-revert to the # last stable job on deployment failure. A job is marked as stable if all the # allocations as part of its deployment were marked healthy. auto_revert = ${auto_revert} %{ endif } } # The "group" stanza defines a series of tasks that should be co-located on # the same Nomad client. Any task within a group will be placed on the same # client. # # https://www.nomadproject.io/docs/job-specification/group # group "${job_name}-group-1" { # The "count" parameter specifies the number of the task groups that should # be running under this group. This value must be non-negative and defaults # to 1. count = ${group_count} # The volume stanza allows the group to specify that it requires a given # volume from the cluster. The key of the stanza is the name of the volume # as it will be exposed to task configuration. # # https://www.nomadproject.io/docs/job-specification/volume %{ if use_host_volume } volume "${job_name}-volume-1" { type = "host" read_only = false source = "${volume_source}" } %{ endif } # The restart stanza configures a tasks's behavior on task failure. Restarts # happen on the client that is running the task. # # https://www.nomadproject.io/docs/job-specification/restart # restart { interval = "30m" attempts = 40 delay = "15s" mode = "delay" } # The constraint allows restricting the set of eligible nodes. Constraints # may filter on attributes or client metadata. # # https://www.nomadproject.io/docs/job-specification/constraint # constraint { attribute = "$${attr.cpu.arch}" operator = "!=" value = "arm64" } constraint { attribute = "$${node.class}" value = "builder" } # The network stanza specifies the networking requirements for the task # group, including the network mode and port allocations. When scheduling # jobs in Nomad they are provisioned across your fleet of machines along # with other jobs and services. Because you don't know in advance what host # your job will be provisioned on, Nomad will provide your tasks with # network configuration when they start up. # # https://www.nomadproject.io/docs/job-specification/network # network { port "${service_name}" { static = ${port} to = ${port} } } # The "task" stanza creates an individual unit of work, such as a Docker # container, web application, or batch processing. # # https://www.nomadproject.io/docs/job-specification/task # task "${job_name}-task-1" { # The "driver" parameter specifies the task driver that should be used to # run the task. driver = "exec" %{ if use_host_volume } volume_mount { volume = "${job_name}-volume-1" destination = "${volume_destination}" read_only = false } %{ endif } %{ if use_vault_provider } vault { policies = "${vault_kv_policy_name}" } %{ endif } # The "config" stanza specifies the driver configuration, which is passed # directly to the driver to start the task. The details of configurations # are specific to each driver, so please see specific driver # documentation for more information. config { command = "local/loki-linux-amd64" } # The artifact stanza instructs Nomad to fetch and unpack a remote resource, # such as a file, tarball, or binary. Nomad downloads artifacts using the # popular go-getter library, which permits downloading artifacts from a # variety of locations using a URL as the input source. # # https://www.nomadproject.io/docs/job-specification/artifact # artifact { source = "${url}" args = [ "-config.file secrets/config.yml" ] } template { change_mode = "noop" change_signal = "SIGINT" destination = "secrets/loki.yml" data = <