fun fun function you know today I’m
going to the cypher in fire side five
fair in a couple of hours so I need to
record an episode before that so we’re
going to do are going to continue the
decoding project the communities
shenanigans project where I write try to
make this nobody where I try to make
this little body come on focus interact
with a server deployed on kubernetes and
a lot of people have asked me why do you
do this on kubernetes why do you do this
on Heroku well because I wanna I could
you know just have some person of the of
the internet do this code for me and
build it or I could just buy a buy an
egg timer and use that for Pomodoro
timer instead but you know it’s fun to
do things if you haven’t watched the
previous week and shenanigans videos you
can watch them there I have not touched
this project for I think two weeks which
means that I have forgotten everything
about it so that is why it’s really good
and that is why it’s very important to
keep a work log to remember where you
were and I have okay last time we did
this we want to press the button and
have the server log out the number of
the button that was pressed okay I don’t
think that I have I think I deleted the
cluster we need this cluster last time
so I’m gonna spin that up no no I need
to create it
take a while come on I’m going to while
that is doing its job I’m going to go to
the window and look at something in the
in the distance because my optician have
taught me that as you watch a screen at
this distance your eyes cramp up and be
that is how you gradually your your eye
eyesight is gradually being detrimental
and watching something in the distance
every 20-30 minutes or so will relax
your eye muscles and we’re done
excellent let’s create a it’s the ploy
Kyrene let’s create a doctor Quick Start
what I’m doing now is kind of annoying
every time I do this thing I spin up a
cluster on the cloud and I don’t want to
keep that running in the two weeks where
I don’t do this project so I spin this
thing again and every time I do that I
have to remember all these commands and
I should really us create a deploy
script for this application I’m not sure
if I should be doing that yet because at
poi script is it’s kind of you know it’s
one of those things that is alluring
it’s you feel like wow this would be so
great if you I could automate it but
it’s gonna take you time to automate it
and you will probably change it a lot so
the time you spend automating it is
probably not gonna be a good time
investment either way I try to you know
just apply a little bit of inertia upon
myself before I before I start creating
the poi scripts and automating that kind
of thing before you know about things I
you don’t want this is a mess I am gonna
be doing this every time and I am going
to make the goal of this episode to make
a deploy script we want an automated
deploy of Kyrene to Benitez now on
Google container we’re spending a lot of
time just getting the server up but you
know development is like that sometimes
you just find yourself with struggling
with just one aspect or but getting your
application deployed and it’s usually
not a hard programming problem it’s
usually some kind of
configuration thing that you just can’t
figure out and that’s the way it is some
parts are going to move very slowly
some parts are going to move very very
fast and that’s the way it is so let’s
first create a deployed no we’re gonna
call it we just control it scripts
directory in this know it wanna scripts
file that’s wrong come on create new not
file I’m stupid scripts folder cool and
this is going to have deploy so we’re
gonna have one deploy script that
creates the cluster from scratch and
deploys the server and one that creates
like updates the existing an existing
server we’re going to begin by having a
next step is that we want to build image
probably gonna do this at the top
because if if you’re not in the docker
terminal this is going to fail and we
don’t want to do anything otherwise you
will this will not fail in the docker
tournament terminal and that means that
the the deploy script will have this
super annoying long thing and then it
will fail at the second step by the way
I want to figure out how to hold bash
all right so we want to create the
cluster and then what’s next we want to
deploy it now we want to wanna upload
the docker image to VM we want to upload
I’m kinda short this tank that we try
checking out Stack Exchange dating in
documentation but it might also be you
know organizational archaeology you
digging around in old code that people
have written or just going around the
office asking who knows about this I
think that we all would like our jobs to
be of coding and stuff but in reality
that is a very small part of the job the
main part of the job is figuring out
am so it’s this in break the replication
control thank that this needs wonder
where do we run this from Dom and oh
crap it’s creating it’s generating this
dynamically because the next command
that we need to do is to actually expose
expose replication controller and these
things and these things you know here
it’s being generated and this it’s not
how do we do this can we perhaps can we
perhaps give the replication controller
a label and expose by label and we do
aha
we’re gonna do a new we’re gonna call it
service JSON Kyrene service ports utter
one word ports this is its 3000 target
for a thousand maybe a selector service
name Korean right because Karina’s
that’s we’re defining a service name
label here
no no here and the in this specification
file for the main replication controller
and the service will be using that to
select it for this world cube CTL create
file service in Bali Kashyap beginning
ah this let’s see if they work cube CTL
I get service yes
okay let’s copy this I P know we don’t
have an external IP yet let’s there
particle IO dashboard right no it’s not
the dashboard it’s the build thing I
think it’s this right right right right
okay but this is just publishing events
well does my code look like we have
looked at code yet so alright because we
have a because this publish where that
goes it’s going it’s going to go to
centrally to the build up particle IO
service there cloud and then we’re gonna
have a service hoc Jason that sets this
up to post to this IP which is our old
server so that won’t work
hmm this is a bit tricky because this
lalalalala
next step we generate a particle of JSON
file from the ip3 turned from from
kubernetes or keep CTL this is a bit
tricky because the cube CTL command like
running cube CTL and get services ah
this thing here first of all this is a
table and the external IP that’s not
gonna appear immediately when we first
run this command this is gonna be empty
so it’s going to have to either wait a
little while or poll so we will be using
node to do this deploy script or at
least parts of it so we won’t be using
bash because Bash is quite possibly the
worst programming language invented of
all time so I think the first step is to
write a reg X that will match this do we
have the output where the thing did not
exist yes so I’m writing this to my
so this is what it looks like when there
isn’t one and this is what it looks like
when there is one so we’re gonna do this
with a regular expression since my Ruby
days I
this was my standard go-to thing I
really like this one is and we want like
any whitespace character and we want
would capture here we want digits any
digit and we want dots and we need to
escape the dots now we want some digits
and we want to escape the dot because
they have a special meaning in regular
expressions IP is always gonna be
formatted like this it really won’t
because this one is like it won’t work
with ipv6 I guess I don’t even know how
an ipv6 address looks like are we
escaping these correctly regular
expressions as the hardest thing ever to
there that’s sort of an IP ah
yes for ipv6 reasons I’m going to know
they might so for supporting ipv6 we’re
gonna change this to word okay and that
will work I thing okay that works for
capturing the the happy path however we
also have the sad path which is when it
looks like this I’m gonna try just make
sure that it works when I do this to all
right wait the other one was actually
wrong it’s the second IP address that we
want so I’m just gonna copy this and
we’re gonna white space here
and then we’re gonna capture and we
don’t care about this right so now it’s
matching second one and let’s see the
non happy path case okay it’s not
matching that’s actually good that’s
actually good our regular expression
works okay so we have a regular
expressions for extracting the the IP
out of the cube CTL it services the next
step is to create a little script
that extracts that out and shoves that
into a Jason for the particle web cooked
and right snap down to disk and then
uses that file to create a new web hook
this is very convoluted but I’m having a
lot of fun this is turning into some
kind of kubernetes DevOps Internet of
Things series I’m going to the sci-fi
fair now I’m going to be continuing this
later in the day or in the evening I
guess and we’ll see where if we can
ah screw it we’ll do this with
JavaScript
haha I tried to extract that with grep
no shell script I don’t remember how to
do this it’s found you see let’s see
this will do nicely
damn install don’t say – ljs gotcha
how does this work this is just magic
syntax because there globally injecting
all these things I’m not sure I like it
but that’s the way chill shell EAS does
it so so how do you just execute a
command o here x ik so I just exact what
square oh right I have to make it
executable or we can’t run it as a Oh
– script okay cool it runs it but we
want to get that as or so as this art
works hello no no do you know what I
want to do oh I have no idea of this
gonna work does this work yes okay but I
got a zero for some reason here what is
this oh okay this is yes this is the
result code you don’t want that say that
let’s try it yes yes so the output is
here cool now let’s just match it to the
Reg X that we made before copy that and
STD out dot match X X X
oh no I lost the poop emoji I should
have this
some kind of hotkey no copy don’t know
why it doesn’t copy online first when
the first time I press it blocked okay I
have to use use strict all right so the
match is okay so this is the match it’s
okay alright the first the first array
of the match is the full string and then
the second one is the actual the first
match so I need to do this to get the IP
so vehicle it let the Const first no ii
ii IP second IP you reg ex yes the red x
i think there we go and then we call
this match ii vipera X matches the
public IP we’re gonna not bulik public
and we’re gonna call that is the matches
one cool let’s just check that that is
okay that
all right cool we’re now extracting the
IP what we wanna do now is to read in
the service hook JSON the particle hook
definition for the particle web hook and
read that in as a sort of template and
replace this IP here with the IP that to
get from service we are going to call
this service of the template instead and
we are going to invent a new IP a new
templating system here I’m not really
mad but I server IP address okay so how
node documentation ain’t nobody got time
for that
this looks good it’s a bit messy okay so
this is the read file we want to read
the serve this
for template JSON file I’m just gonna
log this out and see if it behaves yes
it behaves cool we see here that the
take the log down here is the template
file we and we want to replace the I
server IP address with the public IP we
want to call this new contents sorry
right
new contents not to date are because
there is no date anymore and now we have
replaced the IP that went faster than I
imagined sometimes things go easy okay
we did something I have forgotten what
we were doing and gonna check the work
log ok generate the particle to JSON
file from the IP return from cube CT I
will almost on that what we need to
write this two disc as well so that we
can pass it to the particle web hook
command how do I write to know arrive to
via lol no jest if the words the spot
and Google still figures it out isn’t
this amazing we live in the future
writing father OH
did you notice I have been googling this
before these are purple purple file and
it’s not gonna be called template it’s
gonna be just called service of calling
particle service I’m gonna call a
particle web hook that’s better and we
are going to bind to the one part of me
here wants to turn this into pretty
promises but that is one of those things
that might turn into a distraction that
takes over like the entire task so might
do that in the future might not but I
think it’s always really important to
focus on the end goal before you allow
yourself to tidy things up too much
let’s write a console.log successfully
route to output fun let’s see what that
does
unexpected end of input oh I’m not
ending this properly right all right I
don’t want this to be echoed out I think
yes
let’s make this there okay so we now
have a little script that it when you
run it you know script test that is a
horrible name we’re gonna talk it’s
gonna be Jenna we’re gonna call it
generate web.config like that when we
run generate webhook config that is
going to generate a particle whether
jason with fresh IP picked from the from
communities by running the cubes et al
get services command so what we did was
had a cube City organ services and it’s
gone to via reg Alex it’s going to
extract this string here and it’s going
to hurt put it there but that’s not the
same string no no no it’s complete that
one sorry this one and put it there so I
want to put this in the deploy command
we are going to we’re going to generate
webhook con
web.config and then we are going to
particle weather creamy I think that is
just particle where book JSON right try
that yes yes that works okay we have a
thousand web books now I need to delete
some pool now this was create this won’t
work out of the box because this command
will take a little bit of time not a lot
of time like if we want to be fancy or
we could extend this thing to wait and
pull for it I am too lazy to do that as
I think that I just want a sleep command
bash sleep okay right to sleep for 5
seconds use 5 that was the most
unnecessary copy/paste ever delays it to
write sleep ah ok
X
posing we’ll say while so let’s sleep 20
seconds you know this might be it I’m
going to go and delete my cluster again
ah where is my Google cloud here so this
is my go claw I’m gonna delete this
container cluster here yes I want to
meet Kareem but if I’m pom pom pom pom
pom pom pom from home we’re deleting
it’s deleted ok I am not yet confident
enough to run this on its own so I’m
gonna run ranked line by line just make
this nice and clean okay first command
building the docker image ok successful
build that worked create the cluster
copy paste great oh this would take some
found a bit of old parrots in the
kitchen
you just gotta finish itself because I’m
gonna get carrot in my teeth
and everybody’s gonna screech up at that
worked
push the try pushing the image worked
rating the replication controller it’s
created at work and we are going to
expose no this won’t work because this
is this generator right oh but we
resolve this before we are going to this
is gonna be cube CTL create bow service
yes yes it’s gonna beat that I think
this looks sensible yes okay now we’re
gonna wait 30 seconds what’s this 30
I don’t think 30 seconds is gonna be
enough the way it is there oh yeah now
30 seconds is definitely not enough I’m
gonna use it I’m just gonna go crazy and
do 120 seconds I know I’m just gonna
delete this to make sure that it’s
actually generating it and then we’re
gonna do particle webhook particle jet
trick Jason okay cool I think everything
worked so yes let me do cube CT I’ll get
pods to see what service is running this
is running now so let’s see if we’re
gonna tell the logs of this little
bugger logs do you do to do follow and
if this works now I think yes haha
awesome I’m going to do that again I’m
gonna do that again but I’m going to use
other camera and I’m going to press the
button here and it’s going to update and
I gotta press other buttons I’m just
gonna say for and it’s gonna say to you
and it’s kind of oh yes I have created
life so this works now it’s tiny things
up a bit because everything is really
kubernetes top JSON is a bit of as
misnomer this is actually the
configuration for the replication
this is looking pretty good we’re
spending a lot of time on this and and
and it’s actually pretty stupid for for
a hack but or no nothing is stupid for a
hack and hack is what it is a
side-project is what it is what it’s
whatever you want it to be but for a
real application it’s very very good to
have you know a very simple deploy
process where all these things are
solved in one place and you can do it in
a simple way and you know that it’s
gonna work you don’t need to remember to
put your servers into a certain state to
deploy the app you don’t have to
remember to yeah we have to install this
on this server and you have to
remember to do this before you do that
if you have a process to take care of
that things are going to be a lot easier
for you because this kind of will
take up so much of your time otherwise
our you know some to not watch the
screen yes this means that we have
accomplished our mission we want an
automated deploy of Kyrene on Google
commit message it’s for a master yep and
it’s it’s pushed and you can check it
out here if you are interested in
reading any of this blabber bladder as
usual with these episodes we didn’t get
very far the only thing that we did was
an automate to deploy of our server on
Google cloud what we accomplished what
we set out to do I think it’s very
important to celebrate every little step
along the way because no matter how big
your application is it’s going to be
made up of these small small individual
steps towards a bigger goal and if you
if you focus too much on the end goal
and forget about focusing on the
individual parts and feeling the sense
of progress that you’re making with each
individual part you’re going to feel
you’re going to feel bad you’re gonna
feel like oh I’m not getting to my goal
and eventually if you don’t feel that
sense of progress it’s going to hurt
your motivation so much that you just
don’t have the stamina to each reach
your end goal and this is especially
important when you are working with your
own projects where nobody is telling you
what to do and pushing you so in those
cases you have to think about your
motivation a lot how did you like this
episode how do you like this format did
you feel that this episode improved over
the last episodes is there anything that
you would like to see different do you
like the length or are you actually a
cat and you’re just writing comments on
the internet and you you post as a human
and you want to confess that write a
comment below or write a comment below
write a comment below
or if you don’t feel like that hit like
that’s also good or maybe even hit
subscribe I make a new episode of fun
fun function every Monday and
subscribing will make sure that you
don’t miss out on them if you don’t feel
like waiting and you want more fun fun
function right now you can check out
this episode
perhaps it’s nuts I am mpj this is fun
fun function until next Monday morning stay curious