Collects ignition platform id from /proc/cmdline in the varriable
`ignition.platform.id=` and stores the collected data inside the
`identity::Identity` struct.

Also adds different grains of data collection level: minimum and
full, depending on the passed toml configuration.

Signed-off-by: Allen Bai, abai@redhat.com

Changes the use of term "metrics", deduplicates match pattern and
uses maplit::hashmap! macro.

Picks up CoreOS alpha version information from `/.coreos-aleph-version.json`.

Signed-off-by: Allen Bai, abai@redhat.com

src/full: add hardware data collection

Signed-off-by: Allen Bai <abai@redhat.com>

Signed-off-by: Allen Bai <abai@redhat.com>

Signed-off-by: Allen Bai <abai@redhat.com>

.travis.yml: test inside ubi container instead of ubuntu vm

Allows "yes"/"no" values for `removable` field of `lsmem --json`, because of
different implementations, the field type might be different. However, in an
FCOS machine this will be true/false. This change is mainly to accommodate testing
environment.

Signed-off-by: Allen Bai <abai@redhat.com>

Signed-off-by: Allen Bai <abai@redhat.com>

agent/full: only collect hw info on bare metals

Signed-off-by: Allen Bai <abai@redhat.com>

full/network: collect network info with `nmcli`

Collects network data with format `[key[\s]+value\n]+`,
to see example run `nmcli device show`. Parse the data
as key:value pairs stored in a HashMap.

Signed-off-by: Allen Bai <abai@redhat.com>

Signed-off-by: Allen Bai <abai@redhat.com>

tests: add tests to print minimum and full agent with test config file

Signed-off-by: Allen Bai <abai@redhat.com>

Signed-off-by: Allen Bai <abai@redhat.com>

Dockerfile: install dependency, openssl-devel

Signed-off-by: Allen Bai <abai@redhat.com>

Since reporting will happen daily or monthly, we are keeping
track of time intervals between reports. Two threads are spawned
for tracking daily and monthly reporting. Daily thread will check
timestamp every 12 hours, otherwise put to sleep. Monthly thread
will check every 15 days, otherwise put to sleep.

Signed-off-by: Allen Bai <abai@redhat.com>

…time

Previously we are using individual container runtimes to extract container
information, e.g. calling `podman container ls` to count running containers.
It would create two problems:
  - podman failed when trying to create `/.config/containers` since root dir
    is read-only and dynamic user does not have its own home dir
  - successful calls do not make sense either since counting running containers
    under the dynamic user is not useful
Hence, switch to count containers by calling `pgrep` and count the running
processes of each container runtime.

Signed-off-by: Allen Bai <abai@redhat.com>

Previously used `StateDirectory=` to persist pinger specific
data across bootups. It turns out that systemd does not allow
sharing state directory across different dynamic users. An example
would be:

```
$ systemd-run --pty --property=DynamicUser=yes --property=StateDirectory=wuff /bin/sh
$ systemd-run --pty --property=DynamicUser=yes --property=StateDirectory=wuff /bin/sh
```

Reference: http://0pointer.net/blog/dynamic-users-with-systemd.html
Signed-off-by: Allen Bai <abai@redhat.com>