feat(hub): Loki (config+datasource), panel de logs en node detail, stat nodos caídos + overview compacto, loki_url en deploy_agent

hub/deploy_agent.sh

@@ -19,6 +19,7 @@ HOST="${2:?uso: deploy_agent.sh <node> <ssh_host> [arch]}"
 ARCH="${3:-amd64}"
 
 HUB="https://metrics-dxaqj3ina6eqd5pjt85wkrrj.organic-machine.com/api/v1/import/prometheus"
+LOKI="https://logs-wmaxecsjcfnocz81d5luca92.organic-machine.com/loki/api/v1/push"
 PW="$(pass show fleet/ingest-pass | head -1)"
 BIN="$(cd "$(dirname "$0")/.." && pwd)/apps/metrics_agent/dist/metrics_agent_${ARCH}"
 
@@ -28,7 +29,7 @@ echo ">> copiando binario a $HOST"
 scp -q -o BatchMode=yes "$BIN" "$HOST:/tmp/metrics_agent"
 
 echo ">> instalando servicio en $NODE ($HOST)"
-ssh -o BatchMode=yes "$HOST" "NODE='$NODE' PW='$PW' HUB='$HUB' bash -s" <<'OUTER'
+ssh -o BatchMode=yes "$HOST" "NODE='$NODE' PW='$PW' HUB='$HUB' LOKI='$LOKI' bash -s" <<'OUTER'
 set -e
 sudo -n mkdir -p /opt/fleet-agent /etc/fleet-agent
 sudo -n mv /tmp/metrics_agent /opt/fleet-agent/metrics_agent
@@ -37,6 +38,7 @@ sudo -n tee /etc/fleet-agent/agent.json >/dev/null <<JSON
 {
   "node": "${NODE}",
   "hub_url": "${HUB}",
+  "loki_url": "${LOKI}",
   "user": "fleet",
   "pass": "${PW}",
   "interval_sec": 15
@@ -60,7 +62,8 @@ NoNewPrivileges=true
 WantedBy=multi-user.target
 UNIT
 sudo -n systemctl daemon-reload
-sudo -n systemctl enable --now fleet-agent
+sudo -n systemctl enable fleet-agent >/dev/null 2>&1
+sudo -n systemctl restart fleet-agent
 sleep 3
 echo -n "status: "; systemctl is-active fleet-agent
 OUTER