Just completed the Agentic AI Engineer course at DataArt!
I’ve been exploring AI-DLC, Spec-Driven Development, AI agents, and all the new ways AI is changing how we build software.
And I think I’m getting closer to being a Product Builder — taking an idea, turning it into a working product, and getting it all the way to production.
From idea to production. That’s the fun part!
I usually run coding agents somewhere in a VM or on a remote host, so I don’t have to think about what my laptop is doing.
But sometimes, especially for bigger tasks, I need to run an agent locally on my Mac.
And then there is one annoying problem: macOS may go to sleep while the agent is still working.
Apparently, caffeinate is a very simple way to prevent that.
Keep the Mac awake for a specific amount of time:
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caffeinate -t 3600 |
This keeps it awake for 1 hour (3600 seconds).
For a quick test:
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time caffeinate -t 10 |
And if you want to prevent pretty much all kinds of idle sleep while the command is running:
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caffeinate -dimsu |
Simple, built into macOS, and surprisingly useful when running long AI agent tasks, builds, migrations, or anything else you don’t want interrupted by sleep.
That’s easy!
Add Label:
kubectl label node <node name> node-role.kubernetes.io/<role name>=<key — (any name)>
Remove label:
kubectl label node <node name> node-role.kubernetes.io/<role name>-
Let’s try:
$ kubectl get nodes
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NAME STATUS ROLES AGE VERSION node-1.domain.loc Ready master 51d v1.17.0 node-2.domain.loc Ready <none> 51d v1.17.0 node-3.domain.loc Ready <none> 51d v1.17.0 |
$ kubectl label node node-2.domain.loc node-role.kubernetes.io/worker=
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node/node-2.domain.loc labeled |
and check:
$ kubectl get nodes
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NAME STATUS ROLES AGE VERSION node-1.domain.loc Ready master 51d v1.17.0 node-2.domain.loc Ready worker 51d v1.17.0 node-3.domain.loc Ready <none> 51d v1.17.0 |
How to setup L2TP over IPSec VPN server (Ubuntu 16.04)
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apt-get install strongswan xl2tpd |
# (optional, need to check ) apt-get install ppp libgmp3-dev bison flex
Edit /etc/ipsec.conf
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# /etc/ipsec.conf — Openswan IPsec configuration file modified for Strongswan # (c) Kayama 2018 # Add connections here conn L2TP-IPSEC authby=secret rekey=no keyingtries=3 type=transport esp=aes128-sha1 ike=aes128-sha-modp1024 ikelifetime=8h keylife=1h left=XXX.XXX.XXX.XXX # your router’s external IP leftprotoport=17/1701 right=%any rightprotoport=17/%any rightsubnet=0.0.0.0/0 auto=add dpddelay=30 dpdtimeout=120 dpdaction=clear #force all to be nat’ed. because of iOS forceencaps=yes |
Edit /etc/ipsec.secrets
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# This file holds shared secrets or RSA private keys for authentication. # RSA private key for this host, authenticating it to any other host # which knows the public part. : PSK “TypeYourPassPhraseHere” |
Edit /etc/ppp/options.xl2tpd
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require-mschap-v2 refuse-mschap ms-dns 8.8.8.8 ms-dns 8.8.4.4 asyncmap 0 auth crtscts idle 1800 mtu 1410 mru 1410 connect-delay 5000 lock hide-password local #debug modem name l2tpd proxyarp lcp-echo-interval 30 lcp-echo-failure 4 |
Edit /etc/xl2tpd/xl2tpd.conf
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[global] ipsec saref = no debug tunnel = no debug avp = no debug network = no debug state = no access control = no rand source = dev port = 1701 auth file = /etc/ppp/chap-secrets [lns default] ip range = 192.168.1.10-192.168.1.20 local ip = 192.168.1.1 require authentication = yes name = l2tp pass peer = yes ppp debug = no length bit = yes refuse pap = yes refuse chap = yes pppoptfile = /etc/ppp/options.xl2tpd |
And finally add password to the /etc/ppp/chap-secrets file
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test l2tpd TestTest “*” service xl2tpd restart service ipsec restart |
Everything should work fine!
Upd. 2022.01
