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Description
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Using Kubernetes API Effectively with Golang - Vishal Biyani, Infracloud.io
Extend Kubernetes to write custom abstractions effectively in Go language, starting with basic CRUD operations and then leading into advanced features like informers, listers watchers etc. to build robust and scalable apps.
About Vishal Biyani
Vishal is an engineer focused on programmable & scalable infrastructure in his earlier roles and latest as a CTO at Infracloud Technologies. He is a contributor to Fission - Serverless functions for Kubernetes; organizes “Pune Kubernetes & CNCF Meetup” and “Pune Serverless Meetup” every month and is a Google Developer expert (https://developers.google.com/experts/people/vishal-biyani). He likes books, cycle and natural/urban landscapes.
A
Hope
you
had
a
good
life.
Okay,
so
we're
gonna
talk
about
using
kubernetes
api
effectively,
gonna
go
back,
so
quick.
Introduction
of
my
name
is
Beshara
secant
father
and
if
I
go
technologies,
I'm
also
contributed
efficient
project.
It's
a
service
project
on
top
of
kubernetes
Gd
on
Google
this
and
also
organized
Winnetka,
where
the
speed
up
and
service
meetups.
So,
if
said
in
the
tower,
we
do
it
every
month
join
us
another
small,
quick
announcement.
We
are
doing
a
workshop
specially
for
women
on
kuvira's
6th
of
April
booming.
A
A
What
cube
it's
a
slack
board
which
allows
you
to
talk
to
kubernetes
so
Kubica
to
them
from
slack
and
you're,
adding
matter
most
support
and
adding
a
bunch
of
other
things
pretty
soon
you
can
check
out
at
our
booth
on
the
second
floor
and
the
pin
a
t-shirt
right
and
we
are
kubernetes
gonna
open
source,
a
bunch
of
other
things,
so
quick
questions
before
we
dive
into
the
top.
How
many
of
you
write
coding?
:,
please
answer.
A
Lastly,
did
you
attain
go
forth
on
2018,
so
for
those
of
you
who
are
ready
to
go
for
gone,
some
of
these
things
might
be
repetitive
for
you,
you
can
see
well,
I
thought
cool.
So
the
goal
of
my
talk
today
is
two
things:
introduce
the
vocabulary
in
the
client
go
when
you
are
writing
applications
against
cover
of
this
API
things
like
what
is
the
controller
or
what
is
the
indexer
and
then
expose
some
of
the
basic
best
practices,
whatever
think
of
it
is
native
applications.
A
This
is
mean
to
be
a
starter
dot
for
somebody
who
is
completely
new
to
cover
disk
and
lighting
controllers,
getting
tired
on
those
areas
and
there's
a
greater
proposal
on
the
DL
you
can
clone
it.
You
can
try
to
vent
later
on
with
it
as
a
starting
point
again,
your
sites
will
be
up
on.
My
twitter
handle
is
pretty
cool
so
before
we
dive
into
the
code
and
concepts.
A
A
The
client
code
is
what
you
will
dip
lead,
even
which
is
a
client
bullet
ready.
It
has
things
like
farmers,
Lister's,
watchers
and
you'll
write
pinto
verses
in
this
code,
typically
so
without
too
much
lights.
What
I
want
to
do
is
I
want
to
quickly
dive
into
core
we'll
start
with
a
very
simple
program
ago
program.
There
we
authenticate
with
a
cluster,
and
we
try
to
list
the
parts
that
are.
A
A
All
right,
so
this
is
a
simple
operation
class.
What
I'm
doing
here
is
first
getting
handled
to
kubernetes
and
the
way
I
do
is
to
it.
So
if
you're
within
the
cluster,
you
can
use
in
cluster
config
to
get
handled
to
the
client
set
and
then
just
of
the
operations
follow
using
client
side
so
think
of
it
like
a
connection,
cool
handle
to
a
database
similar
things
for
covalent
effect
and
if
you're
outside
cluster
you'll,
typically
used
to
config
and
cube
config,
is
the
way
you
get
in
the
cluster.
A
Basically,
so
that's
authentication
part
once
they've
got
that
what
we're
doing
is
within
the
client
set
our
queries.
We
are
saying
and
when
I
talk
to
the
code,
we
have
an
API
now,
for
those
of
you,
we're
aware
of
it
is
follows
the
API
naming
convention
there
is
given.
That
is
alpha
beta,
so
based
on,
where
your
object
is,
you
will
use
one
of
those
methods
and
I
want
to
list
parts
here.
So
parts
again
is
a
basic
unit
of
retirement
income.
Earnest
here,
I'm
passing
an
empty
string.
A
That
means
I
don't
care
about
the
namespace
in
which
the
pod
sectors
I
want
to
list
all
the
parts
and
then
I'm
calling
method
on
that.
But
if
the
list
letter
I
am
passing
something
more
I
am
doing
a
meat
of
evil
distortions.
What
does
it
do
so?
Let's
say
I
want
to
filter
I
want
to
filter
all
the
parts
that
have
label
as
database
or
that
are
evenly
spaced.
A
A
A
A
Kind
of
controller:
what
is
the
controller?
It's
nothing
but
active
loop,
which
is
time
to
bring
the
desired
state
to
the
current
state
right.
So
we
don't
specify
the
desired
state
using
a
Hamel
file
using
a
go
program
and
we
say:
hey
look
it'll
apply.
This
yamato-kun
is
just
right
and
then
Cooper
disease.
There
is
this
desired
state
which
says
three
bots
of
ng.
Acts
should
be
running
in
my
cluster,
but
there
is
nothing
and
then
the.
A
State
fruit
alive
state,
so
it
brings
up
the
three
parts
and
seaports
serving
in
the
cluster
right.
Of
course,
this
is
a
oversimplification
of
the
world
controller
loop,
but
the
basic
concept
remains
the
same
right,
there's
a
lot
of
details
that
will
go
through
shortly,
but
the
basic
idea
is
the
same:
you
get
it,
you
get
the
desired
state,
you
get
the
current
state
and
then
you
do
a
recalculation.
A
So
there
are
some
building
blocks.
You
know
when
you
write
controllers
and
I
want
to
talk
about
some
of
these
building
blocks,
which
are
good
to
understand
for
a
newbie
starting
with
Lando
programming.
So
first
thing
is
Alice
torture.
What
does
it
list?
What
you
do?
It
basically
lists
out
objects
like
we
did
in
the
previous
program,
but
also.
A
A
A
The
source
version
is
one
of
the
fields
in
the
metadata
of
the
objects
and
if
optic
changes,
the
research
resumes
change.
So
that
is
the
basic
list
watcher.
Then
there
is
store.
So
once
you
have
got
the
list
of
objects
from
the
properties
cluster
you
understood
in
somewhere
locally
and
that
first
throat
helps
you
store
objects
in
memory,
but.
A
I
am
getting
3000
parts
and
I
want
to
filter
them
for
that
locally,
not
not
very
getting
from
the
server
I'll
use.
Something
called
a
skin
texture.
So
indexer
gives
you
an
indexing
function.
So
I
can
say
this
is
my
Nexus
function,
apply
this
function
to
this
list
of
parts
and
give
me
only
the
one
that
matched
the
induction
spec.
So
it
is
almost
like
a
filter.
You
can
do
that
using
indexing
function.
A
Then
there
is
in
forever.
So
you
get
a
list
of
objects.
You
keep
watching
them,
but
I
want
somebody
to
be
reform
that
hey
this
pod,
what
is
or
this
forward
deleted,
or
this
pod,
what
updated
right
so
informer
is
the
bridge
between
listing
and
watching
from
which
server
to
a
local
cache,
even
informing
that
and
informer
could
also
be
shooting
forward.
So
let's
talk
about
a
use
case.
A
B
A
A
A
What
I
do
is
I
put
the
village
queue
and
then
from
queue
I
have
subscribers
were
gonna
process,
these
items
so
I'm,
basically
using
the
queue
and
the
worker
pattern.
Pretty
much
and
I
can
have
multiple
workers
process
the
pots,
so
I
can
do
thousand
parts.
Maybe
four
workers
so
250
parts
by
one,
but
there
so
I
can
reduce
my
time
from
one
to
one
force
or
off.
Then
there
is
rate
limiting
queue.
A
A
A
A
A
B
A
A
A
If
something
happens,
some
rival
two
functions
here
which
are
in
the
functions,
add
function
and
a
delete
function.
So
this
add
mission
gets
called
he's
doing
spicy
and,
if
delete
function,
gets
called,
please
do
XYZ
and
then
a
finally
making
a
stop
channel
and
simply
sync
mental
order.
So
what
this
is
not
do
is
usually
list
all
the
part
of
independent,
Roku
vanillas
and
then
keep
watching
for
them.
B
A
A
Similarly
I'm
going
to
do
remove
and
it
should
give
me
a
billet
event.
I,
don't
know
if
I'm
watching
for
delete
events.
Yes,
sir,
so
again,
I
got
a
delete
participation
right,
so
these
are
like
basic,
simple
building
blocks
for
building
to
be
nice
controllers
using
client
without
ready
now,
I
looked
at
example.
Looking
for,
let's
look
at
another
example
of
work.
You.
A
B
A
Here
and
read
the
documentation
on
that
matter,
what
exactly
it
does
right,
so
you
don't
necessarily
refer
to
something
your
code
itself
is
explaining
you
what
needs
to
be
done
here
right
and
then
I'm
giving
a
list
water.
There
is
little
like
last
time
just
watching
all
the
parts
for
all
the
things
and
then
I
use
a
new
index
in
forward
pass
the
wristwatch
and
this
time
I
am
only
talking
about
a
dysfunctional,
so
I,
don't
care
about
delete
or
update
function
in
Vistage
and
I.
A
A
Running
it,
we
are
just
getting
the
indexer
handing
power
and
we
did
it
the
queue
in
the
first
place
right.
So
using
these
three
things:
the
informer
indexer
and
the
queue
I'm,
treating
a
simple
object
or
struggle,
basically,
which
houses
all
three.
The
informer
and
excellent
queue
and
I
have
defined
the
definition
of
the
struggle
at
the
top
right,
the
type
controller.
A
A
For
each
item,
you
call
the
word
para.
So
what
cut
here
is
the
actual
thing
that
does
the
heavy
lifting
so
to
speak,
and
it
is
calling
the
process
next
time
so
now,
technically
this
process
next
item
could
be
done
in
a
different
spot
and
I
could
scale
it
out
horizontally
right.
So,
of
course,
here
we
are
showing
with
the
same
fire
or
same
bar,
but
in
practice
you
could
do
this.
A
Two
different
processes
and
this
process
next
item
is
what
could
be
multiple
of
them,
pulling
from
the
same
work
you
and
try
to
get
the
data
right
and
here
I'm
just
getting
the
key
of
the
object
and
declaim
from
the
queue
and
then
say
you
know,
process
from
business
project.
So
typically,
you
will
do
all
the
stuff
that
you
need
to
do
with
the
pod
or
any.
A
A
B
A
So
if
we
try
and
reach
you
so
have
a
property
traffic
of
you,
don't
assume
any
order,
so
you
could
have
potentially
two
or
three
controllers
looking
at
the
same
object,
and
you
can't
assume
that
controller
the
one
is
gonna
get
the
part
first
and
controller
who
is
going
to
get
the
coordinator
break.
So
it's
not
as
if
that
order.
You
can't
rely
on
that
order
for
any
person.
You
also
can't
assume
there
is
not
gonna,
be
any
Latin
see
if
you
are
running
the
highly
available
cluster
in
three
zones
in
any
given
region.
A
A
A
A
A
A
And
there
might
be
a
new
event
for
that
right,
so
you
don't
always
assume
there
is
nothing
more
than
one
actor
trying
to
change
things
apart
from
yourself,
so
that's
all
arose
for
my
car,
the
controller
dog.
The
cover
this
Peter
page
are
a
really
good
read
a
pretty
good
read
for
a
first-time
starter.
There
are
some
sample
controllers
build
in
calico
or
in
fact,
any
other
project
that
is
Highland.