-"I’m a technical architect and programmer, which made the backend, especially the adapters, a natural choice for me. It involves both contributing to the management plane, but also looking at and using service meshes from an architectural point of view. The possible implementations of service meshes is an area that has been particularly fascinating for me." +I’m a technical architect and programmer, which made the backend, especially the adapters, a natural choice for me. It involves both contributing to the management plane, but also looking at and using service meshes from an architectural point of view. The possible implementations of service meshes is an area that has been particularly fascinating for me.
-"I’d probably continue to work with the Meshery adapters for now before moving on to other areas of the project. Haha, I would probably name the Meshery Adapter Library as my favorite Layer5 project till date." +I’d probably continue to work with the Meshery adapters for now before moving on to other areas of the project. Haha, I would probably name the Meshery Adapter Library as my favorite Layer5 project till date.
-"I have worked and collaborated with several open source communities before, including Eclipse Modelling Framework and Apache ServiceMix . I couldn’t possibly make a very accurate comparison, given by limited interaction with other communities, but the Layer5 community stands out based on the unique and extremely inclusive approach it takes towards upholding community values." +I have worked and collaborated with several open source communities before, including Eclipse Modelling Framework and Apache ServiceMix . I couldn’t possibly make a very accurate comparison, given by limited interaction with other communities, but the Layer5 community stands out based on the unique and extremely inclusive approach it takes towards upholding community values.
-"I find meshes intriguing in general. Meshes can look intricate, layered and complicated at a first glance, and yet they are built on the most basic principles. For me, meshes are visual structures, complete with an aesthetic and artistic dimension. " +I find meshes intriguing in general. Meshes can look intricate, layered and complicated at a first glance, and yet they are built on the most basic principles. For me, meshes are visual structures, complete with an aesthetic and artistic dimension.
-"Fun Fact: Overlapping meshes resulting in Moiré patterns are an example of this. They appealed to me from a young age, and I learned about their mathematics from my mathematics teacher." +
Fun Fact: Overlapping meshes resulting in Moiré patterns are an example of this. They appealed to me from a young age, and I learned about their mathematics from my mathematics teacher.
-"An increasing number of applications nowadays consist of distributed services, both in the cloud and on-premises, in mixed and hybrid environments. Many legacy applications are in express need of modernisation, consuming and being consumed by cloud native applications. Introducing microservices, also by refactoring monolithic applications, increases the complexity of the service landscape. By delegating cross-cutting infrastructure concerns like security, traffic management, resilience, and observability to the services mesh, some of the complexity is moved from the applications to the service mesh, allowing application developers to focus on business logic. A concern in these distributed, dynamic and scalable systems is that the security also needs to scale. If security doesn’t scale, it becomes very challenging to handle such systems. Services meshes today are already able to support many of these scenarios, and are continuously improving." +An increasing number of applications nowadays consist of distributed services, both in the cloud and on-premises, in mixed and hybrid environments. Many legacy applications are in express need of modernisation, consuming and being consumed by cloud native applications. Introducing microservices, also by refactoring monolithic applications, increases the complexity of the service landscape. By delegating cross-cutting infrastructure concerns like security, traffic management, resilience, and observability to the services mesh, some of the complexity is moved from the applications to the service mesh, allowing application developers to focus on business logic. A concern in these distributed, dynamic and scalable systems is that the security also needs to scale. If security doesn’t scale, it becomes very challenging to handle such systems. Services meshes today are already able to support many of these scenarios, and are continuously improving.
-"Service meshes are complex but that is something I enjoy attempting as a challenge, to have control and overview and make it appear simple, investing into automating options. Another field that I’m excited to learn about continuously is related to the security of distributed systems, and how service meshes contribute to implementing a zero trust network architecture." +Service meshes are complex but that is something I enjoy attempting as a challenge, to have control and overview and make it appear simple, investing into automating options. Another field that I’m excited to learn about continuously is related to the security of distributed systems, and how service meshes contribute to implementing a zero trust network architecture.
-"I actually dreamed about service mesh a while ago. That was almost a bit spooky.” +I actually dreamed about service mesh a while ago. That was almost a bit spooky.
-"Meshery currently does a great job of providing a neutral platform. Continuing in that direction would be a superb base plan. Enabling innovative applications from vendors, supporting all service meshes, integrating best practice methods, and implementing the SMP and SMI abstractions would probably score the top five positions in Meshery’s new year resolutions in 2021." +Meshery currently does a great job of providing a neutral platform. Continuing in that direction would be a superb base plan. Enabling innovative applications from vendors, supporting all service meshes, integrating best practice methods, and implementing the SMP and SMI abstractions would probably score the top five positions in Meshery’s new year resolutions in 2021.
-"At the moment, Meshery provides a management plane solution and provides support for the SMI and Service Mesh Performance (SMP) specifications. Helpful additions in the future should be the configuration based best practices, especially with regards to security and to possibly extend to owning up specific routes on security. For instance by verifying that the recommendations outlined in the NIST report “Building Secure Microservices-based Applications Using Service-Mesh Architecture” by Ramaswamy Chandramouli and Zack Butcher." +At the moment, Meshery provides a management plane solution and provides support for the SMI and Service Mesh Performance (SMP) specifications. Helpful additions in the future should be the configuration based best practices, especially with regards to security and to possibly extend to owning up specific routes on security. For instance by verifying that the recommendations outlined in the NIST report “Building Secure Microservices-based Applications Using Service-Mesh Architecture” by Ramaswamy Chandramouli and Zack Butcher.
-“I can’t claim to have worked with many implementations, and to have a good overview and wide experience. A lot of the complexity is already handled, but there is still enough to decide and implement for each solution. The solution makes for a challenging but highly interesting task. Additionally, there are a variety of different solutions from different vendors, which is excellent but it also makes it hard to know which would be the best fit for a given situation. Here, again, Meshery can be of invaluable help.” +I can’t claim to have worked with many implementations, and to have a good overview and wide experience. A lot of the complexity is already handled, but there is still enough to decide and implement for each solution. The solution makes for a challenging but highly interesting task. Additionally, there are a variety of different solutions from different vendors, which is excellent but it also makes it hard to know which would be the best fit for a given situation. Here, again, Meshery can be of invaluable help.
-“I take my role as a Meshery maintainer with its benefits and responsibilities. For one, it means to be able to give back to the community. I meet a lot of interesting and friendly people from around the globe, learning about their culture at the same time. Additionally, Open Source allows me to work on and dive into tasks as I like, making it easy to integrate the work with my existing work schedule. It also allows me to learn a lot, expanding on my understanding of service meshes, keeping up with the latest developments in the field, and also giving me the opportunity to witness first-hand how others are using them. This has a quite direct impact on my full-time role, complementing the work I do.” +I take my role as a Meshery maintainer with its benefits and responsibilities. For one, it means to be able to give back to the community. I meet a lot of interesting and friendly people from around the globe, learning about their culture at the same time. Additionally, Open Source allows me to work on and dive into tasks as I like, making it easy to integrate the work with my existing work schedule. It also allows me to learn a lot, expanding on my understanding of service meshes, keeping up with the latest developments in the field, and also giving me the opportunity to witness first-hand how others are using them. This has a quite direct impact on my full-time role, complementing the work I do.
-"A general love for software development combined with a readiness to help out newcomers and participating in the growing community is the key. +A general love for software development combined with a readiness to help out newcomers and participating in the growing community is the key.
-Come and visit, there is something for everyone, be it frontend, backend, CI/CD, website, documentation, standards, interfacing with other communities, and more. The friendly community members and the meshmates will provide support and guidance. Browse the Layer5 and Meshery websites and the repositories on GitHub, where issues suitable for newcomers are especially tagged." +Come and visit, there is something for everyone, be it frontend, backend, CI/CD, website, documentation, standards, interfacing with other communities, and more. The friendly community members and the meshmates will provide support and guidance. Browse the Layer5 and Meshery websites and the repositories on GitHub, where issues suitable for newcomers are especially tagged.
- "I’m working around Service Mesh Acceleration in Intel, and noticed the Service Mesh Performance project. So I attended the community meeting, the community is very active and welcoming and they hope for feedback and contribution from me. It’s the main reason that made me stay here and contribute continuously." + I’m working around Service Mesh Acceleration in Intel, and noticed the Service Mesh Performance project. So I attended the community meeting, the community is very active and welcoming and they hope for feedback and contribution from me. It’s the main reason that made me stay here and contribute continuously.
“Yes, I’ve worked with some open source projects. Layer5 community knows how to cultivate and fulfill the sprint of open source. If you are a newcomer to open source, you can get a big leg up from the Layer5 community."
+Yes, I’ve worked with some open source projects. Layer5 community knows how to cultivate and fulfill the sprint of open source. If you are a newcomer to open source, you can get a big leg up from the Layer5 community.
- “First, I’m working on Service Mesh Acceleration at Intel. Second, service mesh is a hot area this year, more and more people or enterprises are trying service mesh in their production." + First, I’m working on Service Mesh Acceleration at Intel. Second, service mesh is a hot area this year, more and more people or enterprises are trying service mesh in their production.
-“Service Mesh is the bridge between developers and infrastructure, how fascinating it is to build such a thing that benefits everyone.“
+Service Mesh is the bridge between developers and infrastructure, how fascinating it is to build such a thing that benefits everyone.
- “I’m focusing on the SMP project, because it’s related to my working scope. I also use Meshery to manage our service mesh environment and show our effort on Service Mesh acceleration. Every project has its specific goal, I can’t tell which one is the best." + I’m focusing on the SMP project, because it’s related to my working scope. I also use Meshery to manage our service mesh environment and show our effort on Service Mesh acceleration. Every project has its specific goal, I can’t tell which one is the best.
- "Having worked on and been a user of Meshery's performance characterization features, I'm biased. I like the `mesheryctl perf` command the most." + Having worked on and been a user of Meshery's performance characterization features, I'm biased. I like the `mesheryctl perf` command the most.
- “Meshery has a great dream to manage all the popular service mesh projects. It's a great idea for infrastructure & platform managers who are confused with so many different projects to try and understand their differences." + Meshery has a great dream to manage all the popular service mesh projects. It's a great idea for infrastructure & platform managers who are confused with so many different projects to try and understand their differences.
- "We have a distributed performance characterization feature upcoming in Meshery in which Nighthawk will be externalized. Meshery manages the lifecycle of Nighthawk, using Nighthawk as one of its load generators to run performance benchmarks. As Nighthawk supports an adaptive load control as a feature, Meshery can leverage this to build a custom load controller to run performance benchmarks."
+ We have a distributed performance characterization feature upcoming in Meshery in which Nighthawk will be externalized. Meshery manages the lifecycle of Nighthawk, using Nighthawk as one of its load generators to run performance benchmarks. As Nighthawk supports an adaptive load control as a feature, Meshery can leverage this to build a custom load controller to run performance benchmarks. -"By default, the adaptive load controller in Nighthawk runs benchmarks with different RPS values and based on the latency, it adjusts the RPS value. But, with its custom plugin ability, we can bring in our own inputs as well as metrics to measure."
+By default, the adaptive load controller in Nighthawk runs benchmarks with different RPS values and based on the latency, it adjusts the RPS value. But, with its custom plugin ability, we can bring in our own inputs as well as metrics to measure.
-"With the metrics from these tests, Meshery should also adjust the resiliency characteristics of the mesh automatically so as to improve these metrics and in turn improve performance. Meshery allows users to generate traffic load tests using Nighthawk. The tests are controlled and provisioned using meshery-nighthawk, a Meshery component supporting multiple load generators. This is a very powerful feature that is coming up in Meshery." +
With the metrics from these tests, Meshery should also adjust the resiliency characteristics of the mesh automatically so as to improve these metrics and in turn improve performance. Meshery allows users to generate traffic load tests using Nighthawk. The tests are controlled and provisioned using meshery-nighthawk, a Meshery component supporting multiple load generators. This is a very powerful feature that is coming up in Meshery.
"Yes! I think that being a maintainer requires a combination of technical expertise, community engagement, and leadership skills. Start by being a consistent contributor yourself. Demonstrate your commitment by making regular and valuable contributions to the projects. You'll need to build a strong understanding of the technologies and the codebase. In order to demonstrate your technical leadership, you'll need to show initiative, take ownership of tasks, and often do the menial work that other contributors may not want to do."
+Yes! I think that being a maintainer requires a combination of technical expertise, community engagement, and leadership skills. Start by being a consistent contributor yourself. Demonstrate your commitment by making regular and valuable contributions to the projects. You'll need to build a strong understanding of the technologies and the codebase. In order to demonstrate your technical leadership, you'll need to show initiative, take ownership of tasks, and often do the menial work that other contributors may not want to do.
-"One aspect of being a maintainer is actively participating in the Layer5 community, helping newcomers, and engaging in helping advance project discussions. Guiding and supporting other contributors is an expecation of a maintainer, so it's important to have a good understanding of the project and the technologies involved."
+One aspect of being a maintainer is actively participating in the Layer5 community, helping newcomers, and engaging in helping advance project discussions. Guiding and supporting other contributors is an expecation of a maintainer, so it's important to have a good understanding of the project and the technologies involved.
-Finally, I wholeheartedly suggest that you are not afraid to ask questions. The Layer5 community is welcoming and supportive. The existing maintainers are individuals who have given their time and demonstrated their dedication to the betterment of the projects. They are a valuable resource for you to learn from, too, so when you engage with them, be respectful of their time - be sure to have done your homework before asking questions."
+Finally, I wholeheartedly suggest that you are not afraid to ask questions. The Layer5 community is welcoming and supportive. The existing maintainers are individuals who have given their time and demonstrated their dedication to the betterment of the projects. They are a valuable resource for you to learn from, too, so when you engage with them, be respectful of their time - be sure to have done your homework before asking questions.
"Yes, that's right. It's important to remember that the Layer5 community is a diverse group of individuals with different backgrounds, experiences, and perspectives. Remember to have fun and enjoy the process of learning, contributing, and collaborating with the community."
+Yes, that's right. It's important to remember that the Layer5 community is a diverse group of individuals with different backgrounds, experiences, and perspectives. Remember to have fun and enjoy the process of learning, contributing, and collaborating with the community.
The Meshery project moves at an impressive pace thanks to maintainers like Xin. Be like Xin. Join the Layer5 Slack and say “hi".
Community members often inquired about how they can be a part of and contribute to Layer5 and its open source projects. Good news. There are many ways. The following is a list of ways depending upon the manner in which you would like to participate (any and all of these ways are encouraged).
+The Layer5 community grows on a daily basis, which means that each day community managers, MeshMates, and other existing community members field the question of "how can I contribute to your project" any number of times everyday. The good news is that there are many what is to engage - all of which are important to the health of both the projects and the community.
+ +Upon joining the community Slack workspace, individuals are warmly greeted and encouraged to browse the community handbook, join the weekly newcomers meeting, and to begin familiarizing our open source projects. We have heavily invest in each individual that shows up to participate as we consider their success, our success. Part of doing so is ensuring that everyone understands the variety of ways depending in which they can contribute. Any and all of the possible ways are encouraged.
### Community Engagement & Management @@ -113,4 +115,4 @@ All contributions are valuable and every skill set has a place in open source. *Every contribution, big or small, is valuable and helps strengthen the Layer5 community and its projects.* -+ Continuing in our Meet the Maintainer series, we have{" "} + Hussaina Begum. Hussaina + is a maintainer of the{" "} + Meshery CTL project. In + this interview, we get to know Hussaina a little better and learn about her + journey as an open source project maintainer and with Layer5 community. +
++ Hussaina, thank you for joining me today. Many people inside and outside of + the Layer5 Community have seen the effects of your contributions, but may + not know the backstory as to who Hussaina is and how you arrived at your + maintainer role. Indulge us. How did you discover the Layer5 community? What + made you stay? +
++ I wanted to contribute to Open source for a long time and finally made up + my mind to get into the world of Open Source during Hacktoberfest 2020. + Meshery was one of the projects I contributed to and it had a well defined + structure and meetings for everyone - Newcomers call, Developers call, + Websites(FrontEnd development) call, CI/CD call and community call, etc. + Also, the meshmate program where the existing Meshery maintainers help the + newest members to get started. Meshery project aligned with my networking + background and my goal towards backend development using golang. Last but + not the least, lighthearted jokes from Lee during the development call. +
++ You’re a Meshery Maintainer and have been for some long time now. What does + being a Meshery maintainer mean to you? +
++ Lots of learning. Though I started out small in Meshery with a + documentation PR, Meshery community had so much knowledge to share. With + their support, I could start on mesheryctl UX improvements. I have seen many + bright engineers implementing great features in Meshery. I draw inspiration + from them and try to pay it forward by helping new members of the + community. +
++ Layer5 projects has a number of active, open + source projects. You’ve been consistently contributing to a few of them. + Which one(s) are you currently focusing on? + Psst. Also, which one’s your favorite? I won’t tell. +
++ I have contributed to mesheryctl, meshkit and meshery.io projects so far, + It's hard to pick one. +
+What’s the coolest Meshery demo you have done/seen?
++ Meshed playground demo is awesome. I also remember the mesheyctl system + perf CLI demo I have done on the Meshey office hours from one of the Kubecon + events. Kudos to all the contributors of mesheyctl system per command + development and refactors. +
++ What do you anticipate will be Meshery’s biggest announcement this year? +
+Meshey project moving to Incubating status 🙂
+What is your favorite Meshery CLI command?
+mesheryctl system start
+What is your hot tip for working with Meshery that others may not know?
++ Use slack effectively and leverage discuss forum, talk to Meshmates and + maintainers, they are all ears to the issues you face while starting out. +
++ What are some personal goals for the next year with respect to the Meshery + and the Layer5 community? +
++ Work on the long pending system config CLI improvements and contribute to + other Meshey projects. +
++ Interesting. Do expand on that: What do you think Meshery could offer in + addition to what it already does? +
+Labs designed in a way that they work with local resources.
++ Your most often used emoji? Your preference: movie or book? Morning person + or night owl? What have you worked on in the past six months that you’re + particularly proud of? +
++ eyes emoji. My preference is a book compared to a movie. I am a Night Owl + w.r.t. work, however, I use my early mornings for my fitness goals. I have + not been active lately, however removing dependency on CLIs in `mesheryctl + system config` would be something I would consider a good milestone item for + me. +
++ The cloud native ecosystem moves quickly. Keeping up with all the + developments can be challenging. How do you stay up-to-date? +
++ I like listening to kubernetes podcasts and I follow the internal slack + channels for upstream activities at VMware. Also, attending the local KCD + events helped me understand the latest developments across various k8s + projects. Being a program committee member has given me good understanding + of developments across a specific technology area, let it be security and + identity area or the world of service meshes. +
++ Do you have any advice for individuals hopeful to become Layer5 contributors + or potentially maintainers? +
++ Show up and attend the meetings which align with your expertise and areas + you would like to learn or contribute to. Make use of the Meshmates and + Meshery slack and discuss forums are pretty active and everyone is eager to + help. +
++ The Meshery project moves at an impressive pace thanks to maintainers like + Hussaina. Be like Hussaina. Join the{" "} + Layer5 Slack and say “hi". +
+Before we dive into some common warnings and how to address them, let's review how to run build checks on a Dockerfile.
+ +#### Running Build Checks + +To run build checks, simply use the `--check` flag with your `docker build` command: ```bash docker build --check . ``` -**Common Warnings and Remediation** - -Let's explore some frequently encountered warnings and how to address them: +Yes, quite straightforward. This command triggers build checks for the Dockerfile in the current directory. If any issues are detected, Docker will display the corresponding warnings or errors. -**1. FromAsCasing** +Now, we're ready to explore some frequently encountered warnings and how to address them. Here are some of the warnings that I've run into, what they mean, and how to fix them: -**Warning:** `WARN: FromAsCasing: 'as' and 'FROM' keywords' casing do not match` +### 1. FromAsCasing -**Explanation:** This warning occurs when the `FROM` and `AS` keywords in a multi-stage build have different casing (e.g., `FROM` and `as`). While Docker allows both uppercase and lowercase, mixing casing can hinder readability. -**Remediation:** Ensure consistent casing for `FROM` and `AS` keywords throughout your Dockerfile. +- **Warning:** `WARN: FromAsCasing: 'as' and 'FROM' keywords' casing do not match` +- **Explanation:** This warning occurs when the `FROM` and `AS` keywords in a multi-stage build have different casing (e.g., `FROM` and `as`). While Docker allows both uppercase and lowercase, mixing casing can hinder readability. Consistency in casing enhances readability and maintainability, making your Dockerfile easier to understand for both yourself and collaborators. +- **Remediation:** Ensure consistent casing for `FROM` and `AS` keywords throughout your Dockerfile. -```dockerfile +```docker # Incorrect FROM ubuntu:latest as builder @@ -60,13 +78,11 @@ FROM ubuntu:latest as builder FROM ubuntu:latest AS builder ``` -**2. LatestType** - -**Warning:** `WARN: LatestType: 'latest' tag used for base image` +### 2. LatestType -**Explanation:** Using the `latest` tag can lead to unpredictable builds since the base image may change unexpectedly. - -**Remediation:** Specify a specific tag for your base image to ensure consistency and reproducibility. +* **Warning:** `WARN: LatestType: 'latest' tag used for base image` +* **Explanation:** Using the `latest` tag can lead to unpredictable builds since the base image may change unexpectedly. Pinning to specific tags ensures reproducible builds, preventing unexpected behavior due to changes in the base image. This is crucial for production environments where stability is paramount. +* **Remediation:** Specify a specific tag for your base image to ensure consistency and reproducibility. ```dockerfile # Incorrect @@ -76,13 +92,11 @@ FROM ubuntu:latest FROM ubuntu:22.04 ``` -**3. AptGetNoInstallRecommends** - -**Warning:** `WARN: AptGetNoInstallRecommends: 'apt-get install' with no ' --no-install-recommends' flag` - -**Explanation:** Installing recommended packages can increase image size and potentially introduce unnecessary dependencies. +### 3. AptGetNoInstallRecommends -**Remediation:** Use the `--no-install-recommends` flag with `apt-get install` to avoid installing recommended packages. +* **Warning:** `WARN: AptGetNoInstallRecommends: 'apt-get install' with no ' --no-install-recommends' flag` +* **Explanation:** Installing recommended packages can increase image size and potentially introduce unnecessary dependencies. Recommended packages often include extra dependencies that bloat your image size. This can lead to increased storage costs, slower downloads, and potentially longer build times. +* **Remediation:** Use the `--no-install-recommends` flag with `apt-get install` to avoid installing recommended packages. ```dockerfile # Incorrect @@ -92,13 +106,11 @@ RUN apt-get update && apt-get install -y package-name RUN apt-get update && apt-get install -y --no-install-recommends package-name ``` -**4. RunCommandWithNoExecForm** - -**Warning:** `WARN: RunCommandWithNoExecForm: 'RUN' command with no 'exec' form` - -**Explanation:** Using the exec form (`RUN ["executable", "param1", "param2"]`) for RUN commands is generally more efficient and avoids potential issues with shell interpretation. +### 4. RunCommandWithNoExecForm -**Remediation:** Use the exec form for `RUN` commands whenever possible. +* **Warning:** `WARN: RunCommandWithNoExecForm: 'RUN' command with no 'exec' form` +* **Explanation:** Using the exec form (`RUN ["executable", "param1", "param2"]`) for RUN commands is generally more efficient and avoids potential issues with shell interpretation. The exec form provides better performance and avoids potential shell injection vulnerabilities by directly executing the command without shell processing. +* **Remediation:** Use the exec form for `RUN` commands whenever possible. ```dockerfile # Incorrect @@ -109,13 +121,11 @@ RUN ["apt-get", "update"] RUN ["apt-get", "install", "-y", "--no-install-recommends", "package-name"] ``` -**5. RedunantAptUpdate** +### 5. RedunantAptUpdate -**Warning:** `WARN: RedundantAptUpdate: 'apt-get update' found in multiple RUN instructions` - -**Explanation:** Running `apt-get update` multiple times within a Dockerfile is inefficient. - -**Remediation:** Combine `apt-get update` with the subsequent `apt-get install` command in a single `RUN` instruction. +* **Warning:** `WARN: RedundantAptUpdate: 'apt-get update' found in multiple RUN instructions` +* **Explanation:** Running `apt-get update` multiple times within a Dockerfile is inefficient. Each `apt-get update` fetches package information from repositories. Repeating this unnecessarily consumes bandwidth and increases build time. +* **Remediation:** Combine `apt-get update` with the subsequent `apt-get install` command in a single `RUN` instruction. ```dockerfile # Incorrect @@ -126,9 +136,21 @@ RUN apt-get install -y package-name RUN apt-get update && apt-get install -y package-name ``` -**Conclusion** +These are just the checks that I ran into. See the full list of available checks by running `docker build --help` or visiting the [official documentation](https://docs.docker.com/reference/build-checks/). + +## Beyond the Build Check Basics + +Now, that you've gotten started with Dockerfile optimatization, you can further customize build checks to suit your needs. Know that you're not limited to just enabling or disabling all checks, but that Docker offers granular control, allowing you to: + +* **Skip specific checks:** If a particular check isn't relevant to your use case, you can skip it using the `--check=rule1,rule2,!rule3` syntax. This enables `rule1` and `rule2` while skipping `rule3`. +* **Fail on warnings:** By default, warnings don't halt the build process. However, you can enforce stricter compliance by using the `--fail-on=warn` flag, ensuring any warning triggers a build failure. +* **Explore experimental checks:** Push the boundaries with experimental checks by using the `--check=experimental` flag. These checks offer a glimpse into future best practices and can help you stay ahead of the curve. -Docker build checks are a powerful tool for improving the quality of your Dockerfiles. By enabling checks and addressing the warnings, you can ensure your images are optimized, secure, and maintainable. Regularly review the Docker documentation for the latest best practices and updates to build checks. +Build checks are not just about fixing warnings; they are about proactively adopting best practices. Up your Dockerfile game with these additional tips: +* **Embrace multi-stage builds:** Leverage multi-stage builds to create smaller, more efficient images by separating build-time dependencies from runtime essentials. +* **Utilize a `.dockerignore` file:** Exclude unnecessary files from your build context to reduce image size and speed up builds. +* **Order your instructions strategically:** Place frequently changing instructions towards the end of your Dockerfile to take advantage of Docker's layer caching. +By understanding the mechanics of build checks and actively addressing the warnings, you can unlock the full potential of Docker and build robust, efficient, and secure containerized applications.{description}
-About the Author
Paper
+ ++ The Paper component provides an elevated surface for displaying + content. It mimics the behavior of real-world surfaces with shadow + effects, supporting Material Design's elevation system. +
+ +Basic Example
+ ++ Here’s a simple example of a Paper component with default elevation. + This creates a surface with a subtle shadow. +
+Elevation Example
+ +
+ The elevation prop controls the shadow depth. Use
+ values from 0 to 24 to create varying levels of elevation:
+
Variant Example
+ +
+ The Paper component supports two variants: elevation{" "}
+ (default) and outlined. The outlined variant removes
+ shadows and adds a border instead:
+
Square and Rounded Corners
+ +
+ By default, the Paper component has rounded corners. You can make it
+ square by setting the square prop to true.
+
Paper
+ ++ The Paper component provides an elevated surface for displaying + content. It mimics the behavior of real-world surfaces with shadow + effects, supporting Material Design's elevation system. +
+ +Usage Guidelines
+ ++ When using the Paper component, follow these guidelines to ensure + consistency and usability across your designs. +
+ + +Elevation Guidelines
+ +-
+
- Use lower elevations (0-3) for subtle surfaces such as cards and + small sections. +
- Higher elevations (8-24) are best for modals or + key areas that need emphasis. +
- Be mindful of the dark mode + behavior, where higher elevations result in a lighter background. +
Variant Guidelines
+ +-
+
-
+ Use the
outlinedvariant for areas where shadows + might feel visually overwhelming. +
+ - + Stick to the default elevation variant for core components + requiring shadow depth. + +
Corners Guidelines
+ +-
+
- + Rounded corners are more user-friendly and should be preferred + unless a strict design requires square corners. + +
- + Use square corners sparingly, mostly for components meant to + indicate precision or alignment with grid systems. + +
Accessibility
+ +-
+
- + Make sure elevated surfaces have sufficient contrast with the + background. + +
- + Use clear and concise labels or headings for content within Paper + components to enhance accessibility. + +
Paper
+ ++ The Paper component provides an elevated surface for displaying + content. It mimics the behavior of real-world surfaces with shadow + effects, supporting Material Design's elevation system. +
+ ++ The Paper component is useful for designs that require elevated + surfaces, such as cards or modals, and offers multiple configuration + options like elevation, variants, and corner styles. +
+ + +Types
+ +
+ Paper can be configured with different elevation levels
+ to establish a visual hierarchy, and it also supports a flat,
+ outlined variant.
+
Elevation
++ The elevation prop determines the shadow depth, with values ranging + from 0 (no shadow) to 24 (maximum shadow). +
+ +Outlined
+
+ For designs requiring minimal shadows, the outlined{" "}
+ variant can be used instead of the default elevated one.
+
Corners
+ +
+ The Paper component has rounded corners by default, but you can use
+ the square prop to remove rounding.
+
Popper
+ ++ The Popper component provides a mechanism for positioning content + dynamically relative to a reference element. It is commonly used for + tooltips, dropdowns, and modals, enhancing the user experience by + presenting contextual information without overcrowding the interface. +
++ Proper usage of the Popper component can greatly enhance user + experience by providing relevant contextual information at the right + time. Below are some guidelines to ensure effective implementation. +
+ + +Positioning
+ ++ The positioning of the Popper is critical for usability. Use the + `placement` prop to control where the Popper appears relative to its + anchor element. Options include: +
+-
+
- top +
- bottom +
- left +
- right +
- top-start +
- top-end +
- bottom-start +
- bottom-end +
- left-start +
- left-end +
- right-start +
- right-end +
+ Choosing the right position helps to prevent overlap with other + interface elements and improves readability. +
+ + +Styling
+ ++ The Popper component inherits styles from the Sistent theme. You can + customize the appearance by applying styles to the content inside + the Popper. For instance: +
++ Ensure that the styling aligns with your application's theme for a + cohesive look and feel. +
+ + +Accessibility
+ ++ It’s important to ensure that the Popper component is accessible to + all users. Here are some key considerations: +
+-
+
-
+ Use appropriate
aria-attributes to enhance screen + reader compatibility, such asaria-describedbyfor + tooltips. +
+ - + Ensure that the Popper is keyboard navigable, allowing users to + open/close it using keyboard shortcuts. + +
- + Provide sufficient contrast for the text and background colors to + improve readability. + +
Performance Tips
+ ++ When using the Popper component, consider the following to optimize + performance: +
+-
+
- + Avoid excessive rendering by controlling when the Popper is + opened. Use state management effectively to minimize unnecessary + re-renders. + +
- + For complex popper content, consider lazy loading non-critical + elements to improve initial load times. + +