Terraform v0.14 is producing a lockfile after running `terraform init`.
The docs suggest we should include this file in the git repository:
> You should include this file in your version control repository so
> that you can discuss potential changes to your external dependencies
> via code review, just as you would discuss potential changes to your
> configuration itself.
Sounds similar to go.sum
https://www.terraform.io/docs/configuration/dependency-lock.html#lock-file-location
Our dnsmasq configuration needs host-specific data that we can't configure in
the AMI build. But configuring this in userdata leads to a race between
userdata execution, docker.service startup, and dnsmasq.service startup. So
rather than letting dnsmasq come up with incorrect configuration and then
modifying it after the fact, do the configuration in the service's prestart,
and have it kick off a Docker restart when we're done.
The cloud-init configuration runs on boot, which can result in a race
condition between that and service startup. This has caused provisioning
failures because Nomad expects the userdata to have configured a host volume
directory. Diagnosing this was also compounded by a warning being fired by
systemd for the Nomad unit file.
* Update the location of the `StartLimitIntervalSec` field to it's
post-systemd-230 location.
* Ensure that the weekly AMI build is up-to-date to reduce the risk of
unexpected system software changes.
* Move the host volume to a directory we can set up at AMI build time rather
than in userdata.
Small changes to the Windows 2016 Packer build for debuggability of
provisioning:
* improve verbosity of powershell error handling
* remove unused "tools" installation
* use ssh communicator for Packer to improve Packer build times and eliminate
deprecated winrm remote access (unavailable from current macOS)
The `nomad_sha`, `nomad_version`, and `nomad_local_binary` variables for the
Nomad provisioning module assumed that only one would be set. By having the
override each other with an explicit precedence, it makes it easier to avoid
problems with Terraform's implicit variables behavior.
Set the expected default values in the `terraform.full.tfvars` to avoid
shadowing by any future changes to the `terraform.tfvars` file.
Update the Makefile to put the `-var` and `-var-file` in the correct order.
The base Ubuntu AMI modifies apt sources during cloud-init. But the Packer
build can potentially start the setup script before that work is done,
resulting in errors trying to install base system dependencies like
`dnsmasq`. Delay the setup long enough to lose the race with cloud-init.
We intend to expand the nightly E2E test to cover multiple distros and
platforms. Change the naming structure for "Linux client" to the more precise
"Ubuntu Bionic", and "Windows" to "Windows 2016" to make it easier to add new
targets without additional refactoring.
Most of the time that a human is running the TF provisioning, they want the
"dev cluster" which is going to deploy an OSS sha, with fewer targets and
configuration alternatives. But the default `terraform.tfvars` is the nightly
E2E run. Because the nightly run is automated, there's no reason we can't have
it pick a non-default `terraform.full.tfvars` file and have the default be the
dev cluster.
When uploading a local binary for provisioning, the location that we pass into
the provisioning script needs to be where we uploaded it to, not the source on
our laptop. Also, the null_resource for uploading needs to read in the private
key, not its path.
Instead of hard-coding the base AMI for our Packer image for Ubuntu, use the
latest from Canonical so that we always have their current kernel patches.
For everyday developer use, we don't need volumes for testing CSI. Providing a
flag to opt-in speeds up deploying dev clusters and slightly reduces infra costs.
Skip CSI test if missing volume specs.
Provisions vault with the policies described in the Nomad Vault integration
guide, and drops a configuration file for Nomad vault server configuration
with its token. The vault root token is exposed to the E2E runner so that
tests can write additional policies to vault.
The `-var-file` flag for loading variables into Terraform overlays the default
variables file if present. This means that variables that are set in the
default variables file will take precedence if the overlay file does not have
them set.
Set `nomad_acls` and `nomad_enteprise` to `false` in the dev cluster.
Adds a `nomad_acls` flag to our Terraform stack that bootstraps Nomad ACLs via
a `local-exec` provider. There's no way to set the `NOMAD_TOKEN` in the Nomad
TF provider if we're bootstrapping in the same Terraform stack, so instead of
using `resource.nomad_acl_token`, we also bootstrap a wide-open anonymous
policy. The resulting management token is exported as an environment var with
`$(terraform output environment)` and tests that want stricter ACLs will be
able to write them using that token.
This should also provide a basis to do similar work with Consul ACLs in the
future.
Newer EC2 instances are both cheaper and have generally better
performance.
The dnsmasq configuration had a hard-coded interface name, so in order to
accomodate instances with more recent networking that result in so-called
predictable interface names, the dnsmasq configuration needs to be replaced at
runtime with userdata to select the default interface.
Have Terraform run the target-specific `provision.sh`/`provision.ps1` script
rather than the test runner code which needs to be customized for each
distro. Use Terraform's detection of variable value changes so that we can
re-run the provisioning without having to re-install Nomad on those specific
hosts that need it changed.
Allow the configuration "profile" (well-known directory) to be set by a
Terraform variable. The default configurations are installed during Packer
build time, and symlinked into the live configuration directory by the
provision script. Detect changes in the file contents so that we only upload
custom configuration files that have changed between Terraform runs
* remove outdated references to envchain in documentation
* add new host volume locations in userdata
* don't exit the entire script during provisioning, just return
This changeset stages upcoming E2E provisioning improvements work. It splits
the existing shared configuration directory into 3 profiles:
* "full-cluster": the set of configurations currently in use
* "dev-cluster": a simplified set of mostly existing configurations that
weren't in use.
* "custom": an empty profile for developers to keep non-standard
configurations during complex feature development.
The tooling to switch between profiles will be in a later changeset.
Also drops some unused configuration knobs from the provisioning scripts to
make the next stage of work easier.
Our provisioning process for E2E doesn't require the `depends_on` fields to be
set for client instances, so dropping that field allows all instances to be
started in parallel.
We don't use the extra EBS volumes (they aren't even mounted), so remove them
to reduce costs.
The `-recursor` flag in the Consul service unit files is specific to a given
cloud, but we already have cloud-specific configuration files. Consolidate all
the cloud-specific items into the config.
As we add new Linux targets for E2E, the existing setup.sh script will be used
only for Ubuntu. Rather than have the service and config files echo'd from the
script, move them into files we upload so they can be reused.
Includes some general noise reduction in the setup.sh script and removal of
unused bits.
This changeset moves the installation of Nomad binaries out of the
provisioning framework and into scripts that are installed on the remote host
during AMI builds.
This provides a few advantages:
* The provisioning framework can be reduced in scope (with the goal of moving
most of it into the Terraform stack entirely).
* The scripts can be arbitrarily complex if we don't have to stuff them into
ssh commands, so it's easier to make them idempotent. In this changeset, the
scripts check the version of the existing binary and don't re-download when
using the `--nomad_sha` or `--nomad_version` flags.
* The scripts can be OS/distro specific, which helps in building new test
targets.
By default, Docker containers get /etc/resolv.conf bound into the container
with the localhost entry stripped out. In order to resolve using the host's
dnsmasq, we need to make sure the container uses the docker0 IP as its
nameserver and that dnsmasq is listening on that port and forwarding to either
the AWS VPC DNS (so that we can query private resources like EFS) or to the
Consul DNS.
