Grafana provides a repository for dashboards that can be used to easily
import dashboards. Providing these dashboards there would make it easier
for users not using the full setup provided here to still use the
dashboards. To be able to upload however, the datasource reference in the
dashboards has to be a template.
This is however not compatible with the way how the dashboards are imported
in the Grafana of the stack provided here. Thus, the variables are
removed during the installation.
Change-Id: I99f127882a6f7594ca1c40fbe1e299378e89f4e9
Ytt 0.28.0 introduced a breaking change. The --output-directory
option was removed. This was done because this option implicitly
emptied the directory, which could be dangerous. While this option
still exist under a different name, the --output-files option is
now recommended.
The installer now uses the --output-files option, but to ensure a
clean installation, it checks, whether the directory already exists
and if it does, asks the user, whether it can empty it. If it is
not allowed to do so, the installation will abort.
Change-Id: I574c3b054e9293c0534d609c062946cd39890793
This adds the promtail chart to the installation that allows to
collect the logs of the applications in the cluster, which are written
to stdout of the containers.
This will only collect logs from pods in the same namespace as the
monitoring setup. In a later change also logs from Gerrit instances
in Kubernetes will be added.
Change-Id: I86c5c5470eaa31191fb5ac339ee21dee85106097
So far it was only possible to monitor single instance Gerrit servers.
This was due to to the fact that a URL had to be used that pointed to
a dedicated instance, since if multiple replicas would be behind the
instance, the metrics of a random replica would be scraped and not of
all.
Prometheus has a service discovery functionality for deployments running
in Kubernetes. This is now used, when monitoring a Gerrit instance in
Kubernetes. This allows to have a variable number of replicas running,
which will be automatically discovered by Prometheus.
The dashboards were adapted accordingly and allow now to select the
replica to be observed. For now, no summary of all replicas can be
displayed in the dashboards, but that feature is planned to be added
in the future.
Change-Id: I96efc63a192cd90f5e3e91a53dace8e1ae83132e
The installation failed, if TLS verification was disabled and no CA
certificate was given in the configuration. This happened because the
installation script always expected the CA certificate.
The installation now only expects the certificate, if TLS verification
is enabled.
Change-Id: I5429fc1ee0d230c74cc0689607cf2736d6520030
This adds the promtail version used in the setup to a file and adds
an installation step downloading promtail, if the installation is not
run in `dryrun`-mode.
Change-Id: I1127220a57b2610b5c4458ce2205077706a860e6
So far the install-script could only create a single promtail config.
Since the monitoring setup is able to monitor multiple Gerrit servers,
this caused manual work to create a promtail config per Gerrit server.
Now ytt will create a configuration for each Gerrit host configured
in the config.yaml. Ytt is only able to do that in a single file. Thus,
csplit is used to split the files into separate files that can then
be used to configure promtail on the respective hosts. The config-
files can then be found under
$OUTPUT/promtail/promtail-$GERRIT_HOSTNAME.yaml.
Change-Id: Ib09fba83d8a8fbd45b42e9e5388a85a37ab1a952
The scripts were written in bash. Using bash became quite unwieldy.
Python by nature can deal well with yaml and is thus better suited
in dealing with the yaml-based configuration files. This change
rewrites the original scripts staying as close as possible to the
original ones.
Right now, the python scripts call subprocesses a lot to work with
the tools, which were already used before. At least for yaml-
templating there may be better tools that have a python integration,
which could be used in the future.
Change-Id: Ida16318445a05dcfdada9c7a56a391e4827f02e7
