docker
Container log return a single character instead line
I try to get container logs using stream but instead of getting a line every time I get a single character
For example:
If the line in log is: 172.17.0.1 - - [17 / Nov / 2021: 14: 54: 05 +0000] "GET / HTTP / 1.1" 304 0 "-"
So I get in output 1 and in the next log I get the next character 7
Here is my python code:
container_logs = Sdk.docker_client.logs(container=containerid,
stdout=True,
stream=True)
while True:
try:
log = next(container_logs).decode("utf-8")
socketio.emit('stream_logs_response', {'log': log, 'containerid':containerid}, to=sessionid)
socketio.sleep(0)
except StopIteration:
socketio.emit('stream_logs_response', {'log': 'CONTAINER NOT RUNNING','containerid':containerid }, to=room)
break
what am I missing here?
@moti-malka maybe try using attach instead.
From the documentation:
attach(container, stdout=True, stderr=True, stream=False, logs=False, demux=False) Attach to a container.
The .logs() function is a wrapper around this method, which you can use instead if you want to fetch/stream container output without first retrieving the entire backlog.
This function not includes all of the logs function but maybe it will be enough for our use case?
I faced the same issue. According to the code of APIClient._get_result_tty, this happens when you started the container with tty=True. In this case, logs(stream=True) function emits events chunked to separate bytes. It's not well documented.
This was my hacky work around since the chars are coming in 1 char at a time
line = ""
for char in container.logs(stream=True, follow=True):
char = char.decode("utf-8")
line += char
if char == "\n":
line = line.strip()
print(line)
line = ""
