tini | A tiny but valid ` init ` for containers | Continuous Deployment library
kandi X-RAY | tini Summary
kandi X-RAY | tini Summary
Tini is the simplest init you could think of. All Tini does is spawn a single child (Tini is meant to be run in a container), and wait for it to exit all the while reaping zombies and performing signal forwarding.
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Trending Discussions on tini
QUESTION
I have the following ECS container definition
...ANSWER
Answered 2022-Apr-02 at 11:15Per the POSIX documentation for exec (bolding mine):
If exec is specified with
command, it shall replace the shell withcommandwithout creating a new process. ...
Your shell process and the signal handler you created with trap no longer exists once you call exec "$@".
This will probably do what you want, but it's totally untested and I haven't analyzed what the string "$@" that you've constructed:
QUESTION
I was referring to example given in the elasticsearch documentation for starting elastic stack (elastic and kibana) on docker using docker compose. It gives example of docker compose version 2.2 file. So, I tried to convert it to docker compose version 3.8 file. Also, it creates three elastic nodes and has security enabled. I want to keep it minimal to start with. So I tried to turn off security and also reduce the number of elastic nodes to 2. This is how my current compose file looks like:
...ANSWER
Answered 2022-Feb-25 at 08:04Try this :
QUESTION
With the second generation runtime of Google Cloud Run, it's now possible to mount Google Storage Buckets using gcsfuse.
https://cloud.google.com/run/docs/tutorials/network-filesystems-fuse
The python3 example is working fine. Unfortunately, I keep getting this error with my Dockerfile:
...ANSWER
Answered 2021-Dec-23 at 13:39I solved it mounting GCS bucket in Cloud Run and read/write of object with the following changes:
- Dockerfile:
QUESTION
I used the command prefect server start --postgres-port=5433 --server-port=5001 --hasura-port=5002 --graphql-port=5003 --expose to start prefect server at the allowed ports in my azure network. And when i do a docker ps i get
ANSWER
Answered 2021-Dec-08 at 09:17The same issue was posted via community Slack and based on a discussion there we figured that the solution is to set the port using --server-port and not expose other ports since those are used only internally between individual components. So the command below should work:
QUESTION
I have the following C++ code:
...ANSWER
Answered 2021-Nov-20 at 12:27I've been there before. It's a real struggle especially when things work on your device but it's not on other devices.
I'll write the steps I did for my own problem and maybe it can light up some solutions for you.
Things were working perfectly on macOS and I had to compare the docker engine versions between my device and the server which was CentOS7 but no difference!
Then I tried to run the same docker image using docker-compose on Ubuntu instead of CentOS7 and here is the surprise! it was working too, so my problem was only on CentOS7. I would recommend you do the same, try to run your docker image on another OS like Ubuntu just to make sure that's your problem not related to your actual application.
Yes, try to run it as a cronjob. I'm not sure about the problem's root cause but this worked for me. I think it's related to how docker proxy signals when you run the container Here you will find at the end of the README file a useful conclusion about signals depending on how you run your container.
Also, another possible reason is when the application is running in the background the signals somehow are not proxied to it, so running it as a cronjob would be different from a regular background process.
You can manage this approach as a full solution with maintaining the docker container responses to your app (including the crash) as follows:
- Use
tinias the entrypoint of your container. - Make
tiniruns your script asCMD - Your script will update the crontab file with your cronjob (it's up to you to define the frequency of run)
- The added cron would run your actual run script.
- Your run script should have a
trapfunction. Why? once your app is crashed you can send a KILL signal to your entrypoint script (point #2) which will kill the docker container. This way you maintained the behaviour of running your app as an entrypoint.
Hope this is helpful for your case.
QUESTION
typedef struct ResponseBody {
size_t memorySize = BUFSIZ;
size_t dataSize{};
char *bodyMemory = new char[BUFSIZ];
public:
~ResponseBody();
} ResponseBody;
ResponseBody::~ResponseBody() {
delete[] this->bodyMemory;
}
size_t get_containers_callback(const char *buff, size_t size, size_t buff_size, void *data) {
auto *body = (ResponseBody *) data;
size_t needMemory = body->dataSize + buff_size;
if (needMemory > body->memorySize) {
auto *newMemory = new char[needMemory];
strcpy(newMemory, body->bodyMemory);
delete[] body->bodyMemory;
body->bodyMemory = newMemory;
body->memorySize = needMemory;
}
memcpy(body->bodyMemory + body->dataSize, buff, buff_size);
body->dataSize += buff_size;
return size * buff_size;
}
int main() {
auto *responseBody = new ResponseBody;
curl_easy_setopt(curl, CURLOPT_URL, "http://localhost:8080/containers/json?all=true");
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, get_containers_callback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, responseBody);
res = curl_easy_perform(curl);
if (res == CURLE_OK) {
fprintf(stdout, "%s\n", responseBody->bodyMemory);
}
return 0;
}
ANSWER
Answered 2021-Oct-14 at 14:52Using "proper" C++ your code could be rewritten something like this:
QUESTION
ANSWER
Answered 2021-Oct-06 at 00:20When you docker run the image, you'll note the following output:
QUESTION
I have defined 3 services in the docker-compose.yaml file. Out of which 2 services (my-app_my-app_1 & my-app_mongodb_1) are getting started automatically when firing this command docker-compose -f docker-compose.yaml up. But failing to start one of the service (my-app_mongo-express_1). Just to add, I can start the failed container successfully again by executing docker start my-app_mongo-express_1 separately.
Contents of file - docker-compose.yaml:
...ANSWER
Answered 2021-Sep-30 at 16:54You can use the depends_on option to control the order in which your defined services startup.
In this specific case, the mongo-express service has a dependency on the mongodb service, and so if the mongo-express service is started before mongodb, it will fail to connect:
QUESTION
TL;DR - gke 1.20 preemptible nodes cause pods to zombie into Failed/Shutdown
We have been using GKE for a few years with clusters containing a mixture of both stable and preemptible node pools. Recently, since gke v1.20, we have started seeing preempted pods enter into a weird zombie state where they are described as:
Status: Failed
Reason: Shutdown
Message: Node is shutting, evicting pods
When this started occurring we were convinced it was related to our pods failing to properly handle the SIGTERM at preemption. We decided to eliminate our service software as a source of a problem by boiling it down to a simple service that mostly sleeps:
...ANSWER
Answered 2021-Aug-07 at 09:21Starting with GKE 1.20.5 and later, the kubelet graceful node shutdown feature is enabled preemptible nodes. From the note on the feature page:
When pods were evicted during the graceful node shutdown, they are marked as failed. Running kubectl get pods shows the status of the the evicted pods as Shutdown. And kubectl describe pod indicates that the pod was evicted because of node shutdown:
Status: Failed Reason: Shutdown Message: Node is shutting, evicting pods Failed pod objects will be preserved until explicitly deleted or cleaned up by the GC. This is a change of behavior compared to abrupt node termination.
These pods should eventually be garbage collected, although I'm not sure of the threshold value.
QUESTION
I have a docker container
...ANSWER
Answered 2021-Jul-20 at 09:32Seems you confused the source dir in container and target dir in local machine, try docker cp 44758917bf50:/home/jovyan/pysparkex.ipynb ./pyex.ipypnb
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