Assignment 2 - I202357 - Muhammad-Abdullah

assignment-2/I20-2357-Muhammad-Abdullah.md

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+# Q1) Explain Docker Containers vs VMs
+
+- Docker Containers:
+1. OS level virtualization which means abstraction at the app layer.
+2. Share host OS kernel and hardware but can have its own OS.
+3. Space efficient as it takes less storage.
+4. It has burstable Compute, Bustable Memory and Low resource usage since it is light weight.
+5. In containers, there is "No Works on my machine" issue.
+6. Containers are faster to start and stop unlike VM.
+
+- Virtual Machines:
+1. hardware level virtualization which means abstraction of physical layer.
+2. share hardware but has its own OS and kernel.
+3. It is heavy weight as it has complete OS, its applications, binaries, libraries etc.
+4. It has static compute, static memory and high resource usage.
+5. In VM's, there is "Works on my machine" issue very common as a code can work well on developers machine but donot work on client's/user's pc due to version mismatch.
+6. slow to start and stop as it had to boot complete OS and its dependencies and it can cause delay.
+
+# Q2) Write command to create a docker container in detached mode with name assignment-2-I20-2357 running on host port 9090 and container port 80 using image nginx with version 1.24.0 on a custom network named assignment-2
+
+- docker run -d --name assignment-2-I20-2357 -p 9090:80 --network assignment-2 nginx:1.24.0
+
+
+# Q3) Run the above command and add screenshot of it and share the logs
+
+![Container Created Successfully after Creating Network](Assignment2_Q2.PNG)
+
+- Logs: 
+docker logs assignment-2-I20-2357
+/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
+/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
+/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
+10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
+10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
+/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
+/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
+/docker-entrypoint.sh: Configuration complete; ready for start up
+2023/10/06 09:49:41 [notice] 1#1: using the "epoll" event method
+2023/10/06 09:49:41 [notice] 1#1: nginx/1.24.0
+2023/10/06 09:49:41 [notice] 1#1: built by gcc 10.2.1 20210110 (Debian 10.2.1-6) 
+2023/10/06 09:49:41 [notice] 1#1: OS: Linux 5.10.16.3-microsoft-standard-WSL2
+2023/10/06 09:49:41 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
+2023/10/06 09:49:41 [notice] 1#1: start worker processes
+2023/10/06 09:49:41 [notice] 1#1: start worker process 29
+2023/10/06 09:49:41 [notice] 1#1: start worker process 30
+2023/10/06 09:49:41 [notice] 1#1: start worker process 31
+2023/10/06 09:49:41 [notice] 1#1: start worker process 32
+2023/10/06 09:49:41 [notice] 1#1: start worker process 33
+2023/10/06 09:49:41 [notice] 1#1: start worker process 34
+2023/10/06 09:49:41 [notice] 1#1: start worker process 35
+2023/10/06 09:49:41 [notice] 1#1: start worker process 36
+