When a task is restored after a client restart, the template runner will
create a new lease for any dynamic secret (ex. Consul or PKI secrets
engines). But because this lease is being created in the prestart hook, we
don't trigger the `change_mode`.
This changeset uses the the existence of the task handle to detect a
previously running task that's been restored, so that we can trigger the
template `change_mode` if the template is changed, as it will be only with
dynamic secrets.
Make backward compatibility notes about Task Driver config options. Namely, call out the use of blocks with non-identifier attributes (like in docker systctl and storage_options) or nesting block syntax within an attribute assignment. Neither of these are valid HCL2. The solution is relatively simple: We can add = and quote the non-identifier attribute names.
Co-authored-by: Tim Gross <tgross@hashicorp.com>
Applying the default --concurrency for gateways was missed before.
Set the default Envoy concurrency to 1 for connect gateways. The
same override value meta.connect.proxy_concurrency applies.
* docs: Remove 1.0 beta warning about HCL2.0 docs
* docs: multiregion is not beta anymore either
* docs: scaling isn't beta
* docs: neither is events api
Mainly note that block labels need to be string literals, and that decimals without a leading significant digits aren't acceptable anymore (e.g. .9 are required to be 0.9).
Dynamic blocks can be used here, but feels too much of a hack, or a hammer to highlight it here, specially given the error reporting and debugging isn't so straightforward. I'd advocate internally for relaxing the restriction and allowing expressions in block labels instead.
Related to https://github.com/hashicorp/nomad/issues/9522
During testing we discovered old versions of Nomad and Consul seemed to
prevent Envoy from accepting new connections while the Nomad agent was
being upgraded.
* use full name for events
use evaluation and allocation instead of short name
* update api event stream package and shortnames
* update docs
* make sync; fix typo
* backwards compat not from 1.0.0-beta event stream api changes
* use api types instead of string
* rm backwards compat note that only changed between prereleases
* remove backwards incompat that only existed in prereleases
* systemd should be downcased
* containerd should be downcased
* spellchecking, adjust list item spacing
* QEMU should be upcased
* spelling, it's->its
* Fewer exclamation points; drive-by list spacing
* Update website/pages/docs/internals/security.mdx
* Namespace is not ent only now.
Co-authored-by: Tim Gross <tgross@hashicorp.com>
Expand `volume` and `volume_mount` sections to describe how to use HCL2
dynamic blocks and interpolation to have finer-grained control over how
allocations get volumes.
Previously, every Envoy Connect sidecar would spawn as many worker
threads as logical CPU cores. That is Envoy's default behavior when
`--concurrency` is not explicitly set. Nomad now sets the concurrency
flag to 1, which is sensible for the default cpu = 250 Mhz resources
allocated for sidecar proxies. The concurrency value can be configured
in Client configuration by setting `meta.connect.proxy_concurrency`.
Closes#9341
If Docker auth helpers are used but aith fails or the image isn't found, we
hard fail the task. Users may set `auth_soft_fail` to fallback to the public
Docker Hub on a per-job basis. But users that mix public and private images
have to set `auth_soft_fail=true` for every job using a public image if Docker
auth helpers are used.
* Remove Managed Sinks from Nomad
Managed Sinks were a beta feature in Nomad 1.0-beta2. During the beta
period it was determined that this was not a scalable approach to
support community and third party sinks.
* update comment
* changelog
Before, upstreams could only be defined using the default datacenter.
Now, the `datacenter` field can be set in a connect upstream definition,
informing consul of the desire for an instance of the upstream service
in the specified datacenter. The field is optional and continues to
default to the local datacenter.
Closes#8964
Add more detailed HCL2 docs, mostly lifted from Packer with tweaks for Nomad.
The function docs are basically verbatim taken from Packer with basic string substitutions. I commented out some for_each details as the examples are mostly driven towards Packer resources. I'll iterate on those with better Nomad examples.
The API is missing values for `ReadAllocs` and `WriteAllocs` fields, resulting
in allocation claims not being populated in the web UI. These fields mirror
the fields in `nomad/structs.CSIVolume`. Returning a separate list of stubs
for read and write would be ideal, but this can't be done without either
bloating the API response with repeated full `Allocation` data, or causing a
panic in previous versions of the CLI.
The `nomad/structs` fields are persisted with nil values and are populated
during RPC, so we'll do the same in the HTTP API and populate the `ReadAllocs`
and `WriteAllocs` fields with a map of allocation IDs, but with null
values. The web UI will then create its `ReadAllocations` and
`WriteAllocations` fields by mapping from those IDs to the values in
`Allocations`, instead of flattening the map into a list.
Only `change_mode = "restart"` will result in the template environment
variables being updated in the task. Clarify the behavior of the unsupported
options.
* `nomad operator keyring` was missing the general options section
* `nomad operator metrics` was missing a page in the docs entirely
Co-authored-by: Luiz Aoqui <luiz@hashicorp.com>
Create a new "Operating Nomad" section of the docs where we can put reference
material for operators that doesn't quite fit in either configuration file /
command line documentation or a step-by-step Learn Guide. Pre-populate this
with the existing telemetry docs and some links out to the Learn Guide
sections.
* vault secrets named with `-` characters cannot be read by `consul-template`
due to limitations in golang's template rendering engine.
* environment variables are not modified in running tasks if
`change_mode.noop` is set.
The `nomad alloc logs` command does not remove terminal escape sequences for
color from the log outputs of a task. Clarify that the standard `-no-color`
flag, which does apply to Nomad's error responses from `nomad alloc logs`,
does not apply to the log output.
