`--no-init-db` is used to silence the need for `--hostname` and
`--email` arguments; it is a proxy for "this is not a frontend host."
We would ideally like to use `has_class` to know if the user's
provided puppet classes are include an `app_frontend`, and thus
`--hostname` and `--email` are required -- but doing that requires
several other steps, and we would like this feedback to be immediate.
We make the presence of `--puppet-classes` equivalent to
`--no-init-db`, since nearly every configuration with
`--puppet-classes` does not install both a database and a frontend,
which is what is required to initialize a database.
Setting `credential_source` is used when assuming role credentials --
that is, when running as one role, use the AssumeRole right to become
someone else.
The AWS command-line tools only do this if `role_arn`, the role to
assume, is also set -- if it is not set, it transparently falls
through to IAM role attached to the EC2 instance profile. However,
with the `aws-sdk-go` package, used by Teleport, this configuration
produces an error.
Remove the `credential_source = Ec2InstanceMetadata` line, which isn't
necessary for the AWS CLI, and interferes with Teleport operation.
`postgresql-14.4` is a notable upgrade in the PostgreSQL series, as it
fixes potential database corruption from `CREATE INDEX CONCURRENTLY`
statements which are run while rows are modified[1]. However, it also
requires an upgrade from `libllvm9` to `libllvm10`, which means it is
not installed by a mere `apt-get upgrade`.
Add the `--with-new-pkgs` flag to all of the potentially relevant
`apt-get upgrade` calls, so that this (and similar) packages are
upgraded successfully.
[1]: https://www.postgresql.org/docs/release/14.4/
Even though this looks like an independently runnable script, it
should not be run independently: a SHA-256 mismatch will fail to stop
the script, unless it was sourced from another script that has ‘set
-e’.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
Installing an updated linux kernel package, as can happen during the
`apt dist-upgrade` done by the installer, can cause grub to pop up a
prompt to update its configuration file. In an unattended headless
configuration, this will stop the installation.
Explicitly configure apt to be non-interactive, and prefer the newest
configuration, during the install.
The previous steps for standing up a new host were somewhat manual.
This further scripts the process, by using the AWS CLI to start the
instance, and pass it a "user data" script to provision itself upon
boot. This results in a hands-off provisioning process which
completes in 5min.
Additional settings are required for `~/.zulip-install-server.conf`.
It is not suited for all roles, as it assumes one instance type and
security group value. Additionally, not all of the post-provision
process is currently automated -- Nagios SSH key verification, for
instance, is still a manual step. There are also additional steps for
database or frontend servers. Regardless, this is a move toward
automated provisioning.
Alex Vandiver
Anders Kaseorg