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AMQP 0-9-1
AMQP 1.0
MQTT 3.1.1
STOMP 1.0 through 1.2
How to start a ZSH shell session with additional non-permanent aliases?
# zsh-functions.nix
{ pkgs ? import <nixpkgs> {} }:
let
inherit (pkgs) lib;
in
pkgs.writeText "functions.zsh" ''
PATH=${lib.makeBinPath [pkgs.hello]}:$PATH
hi(){
hello
}
''
zsh% eval "source $(nix-build zsh-functions.nix)"
-----------------------
# zsh-functions.nix
{ pkgs ? import <nixpkgs> {} }:
let
inherit (pkgs) lib;
in
pkgs.writeText "functions.zsh" ''
PATH=${lib.makeBinPath [pkgs.hello]}:$PATH
hi(){
hello
}
''
zsh% eval "source $(nix-build zsh-functions.nix)"
RabbitMQ Cannot allocate executable memory. Use the interpreter instead
sudo dnf remove erlang* rabbitmq-server
sudo dnf install rabbitmq-server erlang --disablerepo updates
exclude=rabbitmq_server erlang*
-----------------------
sudo dnf remove erlang* rabbitmq-server
sudo dnf install rabbitmq-server erlang --disablerepo updates
exclude=rabbitmq_server erlang*
-----------------------
Django celery beat not able to locate app to schedule task
@task(name="add_trades_to_database")
def add_trades_to_database():
...
app.conf.beat_schedule = {
'add_trades_to_database_periodically': {
'task': 'transactions.tasks.add_trades_to_database',
'schedule': crontab(minute='*/1'),
},
}
@task
def add_trades_to_database():
...
app.conf.beat_schedule = {
'add_trades_to_database_periodically': {
'task': 'add_trades_to_database',
'schedule': crontab(minute='*/1'),
},
}
from celery import shared_task
@shared_task
def add_trades_to_database():
...
-----------------------
@task(name="add_trades_to_database")
def add_trades_to_database():
...
app.conf.beat_schedule = {
'add_trades_to_database_periodically': {
'task': 'transactions.tasks.add_trades_to_database',
'schedule': crontab(minute='*/1'),
},
}
@task
def add_trades_to_database():
...
app.conf.beat_schedule = {
'add_trades_to_database_periodically': {
'task': 'add_trades_to_database',
'schedule': crontab(minute='*/1'),
},
}
from celery import shared_task
@shared_task
def add_trades_to_database():
...
-----------------------
@task(name="add_trades_to_database")
def add_trades_to_database():
...
app.conf.beat_schedule = {
'add_trades_to_database_periodically': {
'task': 'transactions.tasks.add_trades_to_database',
'schedule': crontab(minute='*/1'),
},
}
@task
def add_trades_to_database():
...
app.conf.beat_schedule = {
'add_trades_to_database_periodically': {
'task': 'add_trades_to_database',
'schedule': crontab(minute='*/1'),
},
}
from celery import shared_task
@shared_task
def add_trades_to_database():
...
-----------------------
@task(name="add_trades_to_database")
def add_trades_to_database():
...
app.conf.beat_schedule = {
'add_trades_to_database_periodically': {
'task': 'transactions.tasks.add_trades_to_database',
'schedule': crontab(minute='*/1'),
},
}
@task
def add_trades_to_database():
...
app.conf.beat_schedule = {
'add_trades_to_database_periodically': {
'task': 'add_trades_to_database',
'schedule': crontab(minute='*/1'),
},
}
from celery import shared_task
@shared_task
def add_trades_to_database():
...
-----------------------
@task(name="add_trades_to_database")
def add_trades_to_database():
...
app.conf.beat_schedule = {
'add_trades_to_database_periodically': {
'task': 'transactions.tasks.add_trades_to_database',
'schedule': crontab(minute='*/1'),
},
}
@task
def add_trades_to_database():
...
app.conf.beat_schedule = {
'add_trades_to_database_periodically': {
'task': 'add_trades_to_database',
'schedule': crontab(minute='*/1'),
},
}
from celery import shared_task
@shared_task
def add_trades_to_database():
...
RabbitMQ fails to start with persistence storage on Kubernetes. Permission denied error
chown rabbitmq:rabbitmq /var/lib/rabbitmq/mnesia
How to restart rabbitmq inside docker
# Copy config from container to your machine
docker cp <insert container name>:/etc/rabbitmq/rabbitmq.config .
# (optional) make changes to the copied rabbitmq.config
...
# Start a new container with mounted config (substitute /host/path
# with a full path to your local config file)
docker run -v /host/path/rabbitmq.config:/etc/rabbitmq/rabbitmq.config <insert image name here>
# Now local config linked inside the container and all changes
# are immediately available. You can restart the container to restart the application.
How can I configure these docker containers using a docker-compose.yml instead of a run command?
services:
my_local_redis:
image: redis
[...]
ports:
- 6379:6379
command: gosu redis:redis redis-server /redis-settings/redis.conf
This task (name) has extra params, which is only allowed
ansible.builtin.shell: "/usr/sbin/rabbitmqctl force_boot"
-----------------------
- name: Force RabbitMQ to boot anyway
command: "/usr/sbin/rabbitmqctl force_boot"
register: result
ignore_errors: True
- debug: var=result
-----------------------
- name: Force RabbitMQ to boot anyway
command: "/usr/sbin/rabbitmqctl force_boot"
register: result
ignore_errors: True
- debug: var=result
RabbitMQ cluster-operator does not work in Kubernetes
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv
spec:
capacity:
storage: 10Gi
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle
hostPath:
path: /mnt/rabbitmq # data will be stored in the "/mnt/rabbitmq" directory on the worker node
type: Directory
# kubectl get pv,pvc -A
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
persistentvolume/pv 10Gi RWO Recycle Bound test-rabbitmq/persistence-rabbitmq-server-0 11m
NAMESPACE NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
test-rabbitmq persistentvolumeclaim/persistence-rabbitmq-server-0 Bound pv 10Gi RWO 11m
# kubectl get pod -n test-rabbitmq
NAME READY STATUS RESTARTS AGE
rabbitmq-server-0 1/1 Running 0 11m
-----------------------
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv
spec:
capacity:
storage: 10Gi
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle
hostPath:
path: /mnt/rabbitmq # data will be stored in the "/mnt/rabbitmq" directory on the worker node
type: Directory
# kubectl get pv,pvc -A
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
persistentvolume/pv 10Gi RWO Recycle Bound test-rabbitmq/persistence-rabbitmq-server-0 11m
NAMESPACE NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
test-rabbitmq persistentvolumeclaim/persistence-rabbitmq-server-0 Bound pv 10Gi RWO 11m
# kubectl get pod -n test-rabbitmq
NAME READY STATUS RESTARTS AGE
rabbitmq-server-0 1/1 Running 0 11m
Airflow issue with pathlib / configparser - 'PosixPath' object is not iterable
# filename: custom_script.py
p = p.parent
confpath = p.joinpath('config', config_file_name))
# filename: custom_script.py
from pathlib import Path
p = Path(dirname(__file__))
p = p.parent
confpath = p.joinpath(config_file_name)
-----------------------
# filename: custom_script.py
p = p.parent
confpath = p.joinpath('config', config_file_name))
# filename: custom_script.py
from pathlib import Path
p = Path(dirname(__file__))
p = p.parent
confpath = p.joinpath(config_file_name)
AMQP connection lost doesn't kill parent process, so reconnection never happens
@restart_delay 2000 # 2 seconds
def init(_opts) do
Process.flag(:trap_exit, true)
send(self(), :connect)
{:ok, nil}
end
def handle_info(:connect, state) do
#...
case Connection.open("amqp://#{username}:#{password}@#{host}:#{port}/#{vhost}") do
{:ok, conn} ->
Process.link(conn.pid)
# ...
{:noreply, state}
{:error, :econnrefused} ->
Logger.error("amqp transport failed with connection refused")
Process.send_after(self(), :connect, @restart_delay)
{:noreply, nil}
end
end
def handle_info({:EXIT, pid, reason}, state) do
Logger.error("amqp transport failed with #{inspect(reason)}")
Process.unlink(pid)
Process.send_after(self(), :connect, @restart_delay)
{:noreply, nil}
end
QUESTION
How to start a ZSH shell session with additional non-permanent aliases?
Asked 2022-Mar-05 at 12:07I'm using ZSH as my default shell on NixOS I've added rabbitmq-server
in a shell.nix
, and need to pass the paths to its binaries to pytest as command line arguments so the pytest-rabbitmq plugin can find them.
For this, I'd like to be able to start ZSH with a pytest
alias which includes the required parameters:
{ pkgs ? import <nixpkgs> { } }:
(
let rabbitmq_bin = "${builtins.toString pkgs.rabbitmq-server}/bin"; in
pkgs.mkShell {
buildInputs = [
pkgs.python39Packages.pytest
# ... (Python environment details omitted for brevity)
pkgs.rabbitmq-server
];
shellHook = "
alias pytest=\"pytest \
--rabbitmq-server ${rabbitmq_bin}/rabbitmq-server \
--rabbitmq-ctl ${rabbitmq_bin}/rabbitmqctl\"
";
}
)
I can add a zsh
invocation in shellHook
, but I haven't been able to figure out a way to instruct it to initialize the alias.
Solutions I've considered:
pytest
alias would affect all my other environments as well. I could use a different alias name, but that would still remain in my static ZSH configuration polluting aliases.ANSWER
Answered 2022-Mar-05 at 12:07nix-shell
/nix develop
were originally designed for the specific use case of debugging Nixpkgs stdenv-based builds, which use bash.
If you want to support a different shell, I'd recommend to create a custom shell launcher script that you can run with nix run
. That gives you all the flexibility you need. That is, assuming you're ok with using experimental features.
Otherwise, you can create a script that fills the gap of nix run
: running nix-build
and exec
-ing its result, which is your custom shell launcher.
Alternatively, you can generate a script to be source
-d.
# zsh-functions.nix
{ pkgs ? import <nixpkgs> {} }:
let
inherit (pkgs) lib;
in
pkgs.writeText "functions.zsh" ''
PATH=${lib.makeBinPath [pkgs.hello]}:$PATH
hi(){
hello
}
''
zsh% eval "source $(nix-build zsh-functions.nix)"
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