Entrypoint tools for elegant, programmable containers
Hello, I'm Jeff! 馃憢
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These tools look like they could be very useful. Some documentation to help explain them, what they do, and maybe an example use case would be awesome.
Would it be possible that the releases are binaries instead of tgz ?
This would allow us to do this in Dockerfiles:
ADD https://github.com/progrium/entrykit/releases/download/v0.4.0/entrykit_0.4.0_Linux_x86_64 /bin/entrykit
[Originally posted by @Brescia717]
Any chance you've tried using prehook? Running this in the Dockerfile:
ENTRYPOINT [ \
"prehook", "ruby -v", "--", \
"prehook", "/myapp/backend/prehook", "--"]
yields this error:
Error response from daemon: failed to create shim task:
OCI runtime create failed: runc create failed:
unable to start container process:
exec: "prehook": executable file not found in $PATH: unknown
NOTE: /myapp/backend is the directory the application is in, in the docker container.
Removes the dependency on the no-longer-supported glu.
With a command like codep <script with flags> <other script> I could not figure out how to get things to behave correctly when the flags required quoting.
For instance, with codep "consul-template -template '/etc/nginx/conf.d/services.conf.ctmpl:/etc/nginx/conf.d/services.conf:nginx -s reload'" I could not for the life of me figure out the quoting that would work correctly. Part of the issue might be that the ENTRYPOINT from Dockerfile makes this even more complicated, but I haven't tried codep directly yet.
I ended up just using an HCL file so I wouldn't need to quote the spaces around "nginx -s reload".
Sometimes running these commands panics a Go program, sometimes it doesn't seem to do anything:
$ sudo docker run -it progrium/envy sh
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x451d12]
goroutine 9 [running]:
os.(*Process).signal(0x0, 0x7f206b2c77a8, 0xc2080325a8, 0x0, 0x0)
/usr/local/go/src/os/exec_unix.go:40 +0x42
os.(*Process).Signal(0x0, 0x7f206b2c77a8, 0xc2080325a8, 0x0, 0x0)
/usr/local/go/src/os/doc.go:51 +0x4e
github.com/progrium/entrykit.func路001()
/home/ubuntu/.go_workspace/src/github.com/progrium/entrykit/entrykit.go:51 +0xf8
created by github.com/progrium/entrykit.ProxySignals
/home/ubuntu/.go_workspace/src/github.com/progrium/entrykit/entrykit.go:54 +0x12e
...
Same thing with /bin/bash:
$ sudo docker run -it progrium/envy /bin/bash
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x451d12]
goroutine 9 [running]:
os.(*Process).signal(0x0, 0x7fe1542ca7a8, 0xc2080325e8, 0x0, 0x0)
/usr/local/go/src/os/exec_unix.go:40 +0x42
os.(*Process).Signal(0x0, 0x7fe1542ca7a8, 0xc2080325e8, 0x0, 0x0)
/usr/local/go/src/os/doc.go:51 +0x4e
github.com/progrium/entrykit.func路001()
/home/ubuntu/.go_workspace/src/github.com/progrium/entrykit/entrykit.go:51 +0xf8
created by github.com/progrium/entrykit.ProxySignals
/home/ubuntu/.go_workspace/src/github.com/progrium/entrykit/entrykit.go:54 +0x12e
...
Idea...render should only render the template if the desired file does not exist. For example, say the end user of a Docker image wants to provide a config file through a volume mount and not care about rendering a template at all.
I do this:
ENTRYPOINT [ \
"codep", \
"/usr/sbin/ucarp --interface=eth0", \
"/usr/local/sbin/haproxy -f /etc/haproxy/haproxy.cfg" ]
And get this:
!! exec: "eth0": executable file not found in $PATH
I don't really understand what's happening, I think codep parses argv[1] wrongly.
If render files having same base filename like test.01.txt test.02.txt, only last file are rendered.
My Dockerfile is like below.
FROM ubuntu:latest
ENV ENTRYKIT_VERSION 0.4.0
ADD https://github.com/progrium/entrykit/releases/download/v${ENTRYKIT_VERSION}/entrykit_${ENTRYKIT_VERSION}_Linux_x86_64.tgz /tmp/entrykit.tgz
RUN tar -xf /tmp/entrykit.tgz -C /bin entrykit && \
entrykit --symlink && \
true
COPY test.01.txt.tmpl /tmp/
COPY test.02.txt.tmpl /tmp/
ENTRYPOINT [ \
"render", \
"/tmp/test.01.txt", \
"/tmp/test.02.txt", \
"--", \
"codep", \
"tail -f /dev/null" \
]
I run this image and exec ls /tmp/. Only test.02.txt exist.
entrykit.tgz test.01.txt.tmpl test.02.txt test.02.txt.tmpl
But if divide render task into two like below, both files are renderd.
ENTRYPOINT [ \
"render", \
"/tmp/test.01.txt", \
"--", \
"render", \
"/tmp/test.02.txt", \
"--", \
"codep", \
"tail -f /dev/null" \
]
Hi, do you have any plan on supporting the Macbook M1? I'm getting this error on my machine:
Here's how we used entrykit in our Docker
RUN wget https://github.com/progrium/entrykit/releases/download/v${ENTRYKIT_VERSION}/entrykit_${ENTRYKIT_VERSION}_Linux_x86_64.tgz \
&& tar -xvzf entrykit_${ENTRYKIT_VERSION}_Linux_x86_64.tgz \
&& rm entrykit_${ENTRYKIT_VERSION}_Linux_x86_64.tgz \
&& mv entrykit /bin/entrykit \
&& chmod +x /bin/entrykit \
&& entrykit --symlink
Thank you!
Entrykit works great with Alpine and it's a bit cumbersome to set up Entrykit. curl .. | tar .. and then entrykit --symlink. If made an Alpine package it could be as simple as apk-install entrykit.
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