Merge branch 'master' of github.com:omidraha/mystack

src/deploy/kubernetes.rst

@@ -331,7 +331,7 @@ Install kubectl binary via curl
 
     $ curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl
     # To download a specific version
-    $ curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.4.6/bin/linux/amd64/kubectl
+    $ curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.13.1/bin/linux/amd64/kubectl
     $ chmod +x ./kubectl
     $ sudo mv ./kubectl /usr/local/bin/kubectl
 
@@ -458,3 +458,10 @@ Labels are key/value pairs attached to objects and can be used in any number of
     $ kubectl get services
     $ kubectl describe services/kubernetes-bootcamp
 
+
+Toturials
+---------
+
+
+https://www.digitalocean.com/community/tutorials/modernizing-applications-for-kubernetes
+

src/django/tips.rst

@@ -205,3 +205,105 @@ Translation
     txt = 'Hello'
     ugettext(txt)
     'سلام'
+
+
+
+Django User Group Object Permissions
+------------------------------------
+
+
+Add permission to user
+
+.. code-block:: python
+
+    from django.contrib.auth.models import User
+    from django.contrib.auth.models import Permission
+    usr = User.objects.first()
+    perm = Permission.objects.get(name='Can edit org')
+    usr.user_permissions.add(perm)
+
+
+Add user to group
+
+.. code-block:: python
+
+    from django.contrib.auth.models import User
+    from django.contrib.auth.models import Group
+    usr = User.objects.first()
+    grp = Group.objects.get(name='Operator')
+    grp.user_set.add(usr)
+
+
+Add group to user
+
+.. code-block:: python
+
+    from django.contrib.auth.models import User
+    from django.contrib.auth.models import Group
+    usr = User.objects.first()
+    grp = Group.objects.get(name='Operator')
+    usr.groups.add(grp)
+
+
+
+Add permission to group
+
+.. code-block:: python
+
+    from django.contrib.auth.models import Group
+    from django.contrib.auth.models import Permission
+    perm = Permission.objects.get(name='can edit org')
+    grp = Group.objects.get(name='Operator')
+    grp.permissions.add(perm)
+
+
+Create permission for an object
+
+.. code-block:: python
+
+    from django.contrib.auth.models import Group
+    from django.contrib.auth.models import Permission
+    from django.contrib.contenttypes.models import ContentType
+    from sample.models import SampleObj
+    ct = ContentType.objects.get_for_model(SampleObj)
+    perm = Permission.objects.create(codename='can edit org', name='Can Edit Org', content_type=ct)
+
+
+
+Add a permission to a user/group during a django migration
+
+
+.. code-block:: python
+
+    from django.contrib.auth.management import create_permissions
+    from django.db import migrations
+
+
+    def create_default_groups_and_permissions(apps, schema_editor):
+        for app_config in apps.get_app_configs():
+            app_config.models_module = True
+            create_permissions(app_config, verbosity=0)
+            app_config.models_module = None
+
+         # Now add your perms to group here
+
+
+    class Migration(migrations.Migration):
+        dependencies = [
+            ('contenttypes', '0002_remove_content_type_name'),
+        ]
+
+        operations = [
+            migrations.RunPython(create_default_groups_and_permissions)
+        ]
+
+
+
+Django rest DjangoModelPermissions
+
+*   ``GET`` requests require the user to have the ``view`` permission on the model.
+*   ``POST`` requests require the user to have the ``add`` permission on the model.
+*   ``PUT`` and ``PATCH`` requests require the user to have the ``change`` permission on the model.
+*   ``DELETE`` requests require the user to have the ``delete`` permission on the model.
+
+https://www.django-rest-framework.org/api-guide/permissions/#djangomodelpermissions

src/linux/cmds.rst

@@ -1485,3 +1485,24 @@ Install fonts
 .. code-block:: bash
 
     $ font-manager
+
+
+Install tzdata noninteractive
+-----------------------------
+
+
+.. code-block:: bash
+
+
+    $ apt-get install -y tzdata
+    $ ln -fs /usr/share/zoneinfo/Asia/Tehran /etc/localtime
+    $ dpkg-reconfigure --frontend noninteractive tzdata
+
+If you are fine with UTC:
+
+
+.. code-block:: bash
+
+
+    $ DEBIAN_FRONTEND=noninteractive apt-get install -y tzdata
+

src/python/celery.rst

@@ -60,3 +60,21 @@ http://stackoverflow.com/a/36977126
 
 http://docs.celeryproject.org/en/latest/userguide/canvas.html#signatures
 
+
+Chain tasks on celery
+---------------------
+
+
+
+.. code-block:: bash
+
+    t1 = my_task_01.subtask((arg1,), immutable=True)
+    t2 = my_task_02.subtask((arg1, arg2), immutable=True)
+    t3 = my_task_01.subtask((arg1,), immutable=True)
+    task_list = [t1, t2, t3]
+    tasks = chain(task_list)
+    tasks.apply_async()
+
+The next task will run, if previous task run successfully.
+
+The `immutable` option is set to `True`, so the result of each task won't  send to the next task.

src/vcs/git.rst

@@ -751,3 +751,33 @@ Related error: Git: cannot checkout branch - error: pathspec  did not match any
         rc
         dev
 
+
+Fix git remote fatal: index-pack failed
+-----------------------------
+
+Traceback:
+
+.. code-block:: bash
+
+
+    or@omid:~/ws$ git clone git@bitbucket.org:example/example.git
+    Cloning into 'example'...
+    remote: Counting objects: 39831, done.
+    remote: Compressing objects: 100% (16929/16929), done.
+    Connection to bitbucket.org closed by remote host. 163.00 KiB/s
+    fatal: The remote end hung up unexpectedly
+    fatal: early EOFs:  99% (39758/39831), 19.57 MiB | 166.00 KiB/s
+    fatal: index-pack failed
+
+Solution:
+
+.. code-block:: bash
+
+    $ git config --global core.compression 0
+    $ git clone --depth 1 git@bitbucket.org:example/example.git
+    # retrieve the rest of the clone
+    $ git fetch --unshallow
+    # or, alternately:
+    $ git fetch --depth=2147483647
+    $ git pull --all
+

src/virtualization/docker.rst

@@ -476,3 +476,92 @@ Set image name when building a custom image
 .. code-block:: bash
 
     $ docker build -t image_name .
+
+
+Set environment variables during the build in docker
+----------------------------------------------------
+
+.. code-block:: bash
+
+    FROM ubuntu:18.04
+    RUN apt-get update
+    ARG DEBIAN_FRONTEND=noninteractive
+
+
+The `ARG` is for setting environment variables which are used during the docker build process,
+and they are not present in the final image
+
+
+Remove unused, <none>, untag docker images file
+-----------------------------------------------
+
+
+.. code-block:: bash
+
+    $ docker image prune -f
+
+
+https://docs.docker.com/engine/reference/commandline/image_prune/#usage
+
+
+Disable auto-restart on a container
+-----------------------------------
+
+
+.. code-block:: bash
+
+    $ docker update --restart=no container-id
+
+
+Minimal base docker OS images
+-----------------------------
+
+
+
+* https://registry.hub.docker.com/_/ubuntu/
+
+* https://registry.hub.docker.com/u/library/debian/
+
+* https://registry.hub.docker.com/_/busybox/
+
+* https://registry.hub.docker.com/_/centos/
+
+* https://registry.hub.docker.com/_/fedora/
+
+* https://registry.hub.docker.com/_/alpine/
+
+* https://registry.hub.docker.com/_/cirros/
+
+* https://hub.docker.com/_/python/
+
+* https://github.com/GoogleContainerTools/distroless
+
+https://www.brianchristner.io/docker-image-base-os-size-comparison/
+
+.. code-block:: bash
+
+    $ docker pull python:3.6-alpine
+    $ docker images | grep -i python
+    #    python          3.6-alpine          cb04a359db13        3 days ago          74.3MB
+
+
+https://github.com/docker-library/python
+
+
+.. code-block:: bash
+
+    $ docker pull gcr.io/distroless/python3
+    $ docker images | grep -i distroless
+    #   gcr.io/distroless/python3   latest              523f07cec1e2        49 years ago        50.9MB
+
+Note that there is no ```docker exec(run) -it  ...``` in `distroless` image.
+
+https://github.com/GoogleContainerTools/distroless
+
+
+Links:
+
+https://medium.com/c0d1um/building-django-docker-image-with-alpine-32de65d2706
+
+https://www.caktusgroup.com/blog/2017/03/14/production-ready-dockerfile-your-python-django-app/
+