Docker Swarm
Getting Started
Requirement
- Docker has been installed
- The client and daemon API must both be at least 1.24 to use this command. (check docker version)
what is docker swarm?
How Docker works?
Avoid single point of failure..
Docker Swarm Frequent USED Command
Docker Swarm Basic Command
Command | Description |
---|---|
docker swarm init | Initialize a swarm. |
docker swarm join | Join a node to a swarm. |
docker swarm join-token | Manage join tokens |
docker swarm leave | Leave the swarm |
docker swarm update | Updates a swarm with new parameter values. |
docker swarm ca | View or rotate the current swarm CA certificate. |
Initialize a swarm. The docker engine targeted by this command becomes a manager in the newly created single-node swarm.
docker swarm init
Usage
docker swarm init --advertise-addr 192.168.65.3:3277
Join a node to a swarm.
The node joins as a manager node or worker node based upon the token you pass with the --token flag. If you pass a manager token, the node joins as a manager. If you pass a worker token, the node joins as a worker.
docker swarm join
Usage
#To Join As Worker
docker swarm join --token
SWMTKN-1-0o98avmvaz953j5zcdi0cu2endu1efv0o7msg5rgg9029b80uh-7fxpvu7croo4a4q63sg50kw2p
192.168.65.3:2377
#To Join As Manager
docker swarm join-token manager
docker swarm join --token
SWMTKN-1-0o98avmvaz953j5zcdi0cu2endu1efv0o7msg5rgg9029b80uh-6ueth0rrghscogkbwwhu3c7cj
192.168.65.3:2377
Manage join tokens
docker swarm join-token
Usage
docker swarm join-token (worker|manager)
When you run this command on a worker, that worker leaves the swarm.
You can use the --force option on a manager to remove it from the swarm.
However, this does not reconfigure the swarm to ensure that there are enough managers to maintain a quorum in the swarm.
The safe way to remove a manager from a swarm is to demote it to a worker and then direct it to leave the quorum without using --force. Only use --forcein situations where the swarm will no longer be used after the manager leaves, such as in a single-node swarm.
docker swarm leave
Usage
docker swarm leave
Updates a swarm with new parameter values. This command must target a manager node.
docker swarm update
Usage
docker swarm update --cert-expiry 720h
Manage Docker Swarm Nodes
Command | Description |
---|---|
docker node ls | List nodes |
docker node inspect (self/HOSTNAME) --pretty | Inspect an individual node |
docker node promote HOSTNAME | Promote a worker node to the manager role. |
docker node demote HOSTNAME | Demote a manager node to the worker role. |
docker node rm HOSTNAME | Remove the node from the node list. |
Manage Docker Swarm Services
Command | Description |
---|---|
docker service create | Create a new service |
docker service inspect | Display detailed information on one or more services |
docker service logs | Fetch the logs of a service or task |
docker service ls | List services |
docker service ps | List the tasks of one or more services |
docker service rm | Remove one or more services |
docker service rollback | Revert changes to a service’s configuration |
docker service scale | Scale one or multiple replicated services |
docker service update | Update a service |
DEMO TIME
ci/cd
what is ci?
ci stands for continuous integration
It focuses on blending the work products of individual developers together into a repository
Primary purpose is to enable early detection of integration bugs
what is cd?
cd stands for continuous delivery
Focuses to minimize the friction points that are inherent in the deployment or release processes.
The implementation involves automating each of the steps for build deployments.
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CI/CD Pipeline
Docker Swarm & CI/CD
By Syafiq bin abdul rahman
Docker Swarm & CI/CD
- 714